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Dirección: Dirección: Biblioteca Central Dr. Luis F. Leloir, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Intendente Güiraldes 2160 - C1428EGA - Tel. (++54 +11) 4789-9293 Contacto: Contacto: [email protected] Tesis Doctoral Adsorción de fluidos sobre sustratos Adsorción de fluidos sobre sustratos sólidos, estudiada en el marco de sólidos, estudiada en el marco de funcionales de la densidad funcionales de la densidad Sartarelli, Salvador Andres 2012 Este documento forma parte de la colección de tesis doctorales y de maestría de la Biblioteca Central Dr. Luis Federico Leloir, disponible en digital.bl.fcen.uba.ar. Su utilización debe ser acompañada por la cita bibliográfica con reconocimiento de la fuente. This document is part of the doctoral theses collection of the Central Library Dr. Luis Federico Leloir, available in digital.bl.fcen.uba.ar. It should be used accompanied by the corresponding citation acknowledging the source. Cita tipo APA: Sartarelli, Salvador Andres. (2012). Adsorción de fluidos sobre sustratos sólidos, estudiada en el marco de funcionales de la densidad. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Cita tipo Chicago: Sartarelli, Salvador Andres. "Adsorción de fluidos sobre sustratos sólidos, estudiada en el marco de funcionales de la densidad". Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 2012.

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Page 1: Adsorción de fluidos sobre sustratos sólidos, estudiada

Di r ecci ó n:Di r ecci ó n: Biblioteca Central Dr. Luis F. Leloir, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Intendente Güiraldes 2160 - C1428EGA - Tel. (++54 +11) 4789-9293

Co nta cto :Co nta cto : [email protected]

Tesis Doctoral

Adsorción de fluidos sobre sustratosAdsorción de fluidos sobre sustratossólidos, estudiada en el marco desólidos, estudiada en el marco de

funcionales de la densidadfuncionales de la densidad

Sartarelli, Salvador Andres

2012

Este documento forma parte de la colección de tesis doctorales y de maestría de la BibliotecaCentral Dr. Luis Federico Leloir, disponible en digital.bl.fcen.uba.ar. Su utilización debe seracompañada por la cita bibliográfica con reconocimiento de la fuente.

This document is part of the doctoral theses collection of the Central Library Dr. Luis FedericoLeloir, available in digital.bl.fcen.uba.ar. It should be used accompanied by the correspondingcitation acknowledging the source.

Cita tipo APA:

Sartarelli, Salvador Andres. (2012). Adsorción de fluidos sobre sustratos sólidos, estudiada enel marco de funcionales de la densidad. Facultad de Ciencias Exactas y Naturales. Universidadde Buenos Aires.

Cita tipo Chicago:

Sartarelli, Salvador Andres. "Adsorción de fluidos sobre sustratos sólidos, estudiada en elmarco de funcionales de la densidad". Facultad de Ciencias Exactas y Naturales. Universidadde Buenos Aires. 2012.

Page 2: Adsorción de fluidos sobre sustratos sólidos, estudiada

❯❱ ❯

t ♥s ①ts ② trs

♣rt♠♥t♦ ís

s♦ró♥ ♦s s♦r sstrt♦s só♦s

st ♥ ♠r♦ ♥♦♥s ♥s

ss ♣rs♥t ♣r ♦♣tr ♣♦r tít♦ ♦t♦r

❯♥rs ♥♦s rs ♥ ♥s íss

♦r ♥rs rtr

rt♦r ss r s③ ③②s③

♦♥sr♦ st♦s r rt♥ ③ ③

r r♦

♥tr♦ tó♠♦ ♦♥stt②♥ts ♦♠só♥ ♦♥ ♥rí tó♠ ♥♦s rs

❯♥rs ♦♥ ♥r r♠♥t♦ ♥♦s rs

♥♦s rs

Page 3: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 4: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦ró♥ ♦s s♦r sstrt♦s só♦sst ♥ ♠r♦ ♥♦♥s ♥s

s♠♥

s♦ró♥ ss ♥♦s ás♦s r ② ❳ s♦r sstrt♦s só♦s ♠ts ♥♦s s ②

② ♥♦s ♦tr♦s ♦♠♣st♦s s ♥st ♥ ♠r♦ ♦rí ♥♦♥ ♥s st♠♦s t♥t♦

s♦ró♥ s♦r ♥ s♦ ♣r ♣♥ ♦♠♦ ♥♦ r♥rs ♣♥s s♠étrs ♥ ♣r♠r r ♣r♦♣♦♥♠♦s

♥ ♦r♠ ♣r ♥tró♥ ♣rs ♦ q ♣ t③rs ♥ t♦♦ r♥♦ t♠♣rtrs T ♥tr

♣♥t♦ tr♣ ② rít♦ Tt ≤ T ≤ Tc ❱r♠♦s q ♣ró♥ ♣r t♥só♥ s♣r ♥trs

íq♦♣♦r r ② ❳ s ♦rrt ♠♦s s♦tr♠s s♦ró♥ ② ♣rs ♥s

♥③♠♦s í♥s ♣r♠♦♦ ② tr♠♥♠♦s t♠♣rtrs ♠♦♦ Tw ② ríts ♣r♠♦♦ Tcpw ♥

♥♦ r♥rs s♠étrs ♥♦♥tr♠♦s q ♦ rts ♦♥♦♥s ♦s st♦s ♥♠♥ts t♥♥ ♣rs

♥s q ♦♥ s♠trí ♣♦t♥ r♦ ♣♦r s ♣rs ② ♥ ♦rró♥ ♥tr ♣ró♥

st♦s ♣rs s♠étr♦s ② ①st♥ í♥s ♣r♠♦♦ s♦♠♦s ♦s sst♠s ♣♥♦ s stísts

♦rrs♣♦♥♥ts ♦s ♥s♠s ♥ó♥♦ sst♠ rr♦ ② r♥ ♥ó♥♦ sst♠ rt♦ ♦str♠♦s q

♣r sst♠s rt♦s t♠é♥ s ♦t♥ s♦♦♥s s♠étrs ♦♦s ♦s t♠s stá♥ st♦s ♥ t

Prs s s♦ró♥ ♦s r♠♥t♦ ♣ís ♥trss ② ♥ó♠♥♦s ♠♦♦ ♣tr s♣ó♥

t♥ s♠trí

Page 5: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 6: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦r♣t♦♥ ♦ s ♦♥ s♦ sstrts st ♥t r♠ ♦ t ♥st② ♥t♦♥s

strt

s♦r♣t♦♥ ♦ ♥♦ ss ss r ② ❳ ♦♥ s♦ sstrts ♦ ♠ts ♥ ♦tr ♦♠♣♦sts r

♥②③ ♥ t r♠ ♦ t ♥st② ♥t♦♥ ♦r② ❲ ♥stt ♦t t s♦r♣t♦♥ ♦♥ s♥ ♥

t ♥ ♦ s②♠♠tr ♣♦r sts ♥ rst st♣ ♣r♦♣♦s ♥ ♥②t ♦r♠ ♦r ♣r ♥trt♦♥ t♥

t♦♠s ♥ s ♦r t ♥tr r♥ ♦ t♠♣rtrs T t♥ tr♣ ♣♦♥t ♥ t rt ♦♥ Tt ≤ T ≤ Tc

❲ r tt ♣rt♦♥s ♦r t sr t♥s♦♥ ♦ t q♣♦r ♥tr ♦ r ♥ ❳ r ♦rrt

❲ t s♦r♣t♦♥ s♦tr♠s ♥ ♥st② ♣r♦s ❲ ♥②③ t ♣rtt♥ ♥s ♥ tr♠♥ tt♥

t♠♣rtrs Tw ♥ rt ♣rtt♥ ♦♥s Tcpw ❲ ♦♥ tt ♥r rt♥ ♦♥t♦♥s tr r r♦♥

stts t ♥st② ♣r♦s tt r t s②♠♠tr② ♦ t ♣♦t♥t ①rt ② t s r s ♦rrt♦♥

t♥ t ♦rr♥ ♦ s②♠♠tr ♣r♦s ♥ t ①st♥ ♦ ♣rtt♥ ♥s ♦r s♦♥ t qt♦♥s

♣♣ ♦t t ♥♦♥ ♦s s②st♠ ♥ r♥ ♥♦♥ ♦♣♥ s②st♠ ♥s♠s ❲ s♦ tt ♦r ♦♣♥

s②st♠ ♦♥ s♦ ts s②♠♠tr s♦t♦♥s

②♦rs s♦r♣t♦♥ ♦ s r♦t ♦ ♠s ♥trs ♥ tt♥ ♣♥♦♠♥ ♣♦♥t♥♦s s②♠♠tr② r

Page 7: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 8: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♠♥t♦s

r♦ rr t♦s s ♣rs♦♥s q ♥ ♠♥r ♦tr ♠ ②r♦♥

♦♥rtr st sñ♦

r s③ ③②s③ ♥♦ s♦♦ ♣♦r r♠ ♣t♦ ♣r trr ♥t♦ é s♥♦

t♠é♥ ♣♦r sr③♦ q ♣s♦ ♣r q t♦♦ ♥ ♣rt♦ ♣♦r s s♣♦só♥

② ♣♦r t♦♦ ♦ q rs s ①♥ ♣r♦s♦♥ ♣r♥í ❨ t♠é♥ ♣♦r s

♣♥

r③♦ t♠é♥ s ①♥ts ♣rs♦♥s q t♥♦ ♦♠♦ ♦♠♣ñr♦s tr♦

♦♦♦ rr r♥st♦ ②rs ② r♦ ❱r q♥s ♥ ♠ás ♥ ♦♣♦rt♥

trr♦♥ ♠ás ♥t ♣r q ②♦ ♣r r ♠ás t♠♣♦ st ss

rs ♦♥③ás ♣♦r ♣rstr♠ t ♦③ ♦♠♣t♦r ② t♠é♥ ♣♦r ♦s

♠♦♠♥t♦s st♥só♥

s♣♠♥t rs ♠ ♠ ♣♦r t♦♦ ♣♦②♦ ② ♥t

r♦ t♠é♥ rr ♠② s♣♠♥t ♦s srs ♠♥♦s ①♣♦♥s

rs ♥♦ ② st♥ ♣♦r t♦♦ ♦ q ②r♦♥ ② ♣♦rq ♠ s♥

②♥♦

rs ♥ ② ♥ ♣♦r t♦ q sts ♣rs♦♥ts s♥ ♥trr

Page 9: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 10: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦s srs q qr♦ ♠♦

② q ② ♥♦ stá♥

Page 11: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 12: Adsorción de fluidos sobre sustratos sólidos, estudiada

❮♥ ♥r

srr♦♦ ss

♥tr♦ó♥ ♥r

♦s ♠♣s

♦rí ♥♦♥ ♥s

r ♥tr♦ó♥ stór

t♦rí ♣ ♦s s♣t♦s ♥tí♦s ② t♥♦ó♦s

trs rr♠♥ts tórs

ét♦♦s ♠ó♥

♦rís ♦♥s ♥trs

♦rís ♣rtr♦♥s

♦rí ♥♦♥ ♥s

♥tr♦ó♥ ♦r♠s♠♦

♦s ♦♠♦é♥♦s

♥ó♥ ♣rtó♥ ♦rrs♣♦♥♥t s

♥ó♥ ♣rtó♥ s♦ ♦♥ s ♥tr♦♥s

♥♦♥s ♦rró♥

♦s ♥♦ ♦♠♦é♥♦s ♦rís ♦s ② ♥♦ ♦s

♦r♠s♠♦ r③♦♥♥s♥rs♦♥

♦rí s s ♥♠♥ts

s♣t♦s ♦r♠s t♦rí

♣t♠③ó♥ ♥♦♥ ♣r♦♣st♦ ♥ st ss

♥tr♦ó♥

str ♣r♦♣st

st ♥♦♥

st♦s ♦t♥♦s

st ♦s ♣rá♠tr♦s ♦rrs♣♦♥♥ts ó♥

❱ró♥ á♠tr♦ ♠♦r ② ♥t♥s ♣♦t♥ ♣rs

Page 13: Adsorción de fluidos sobre sustratos sólidos, estudiada

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

rs ♦①st♥ íq♦♣♦r ó♥

á♦s ♦rrs♣♦♥♥ts ró♥

❱ró♥ á♠tr♦ ♠♦r ② ♥t♥s ♣♦t♥ ♣rs

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

rs ♦①st♥ íq♦♣♦r

á♦s ♦rrs♣♦♥♥ts ❳♥ó♥

á♠tr♦ ♠♦r ② ró♥ ♣r♦♥ ♣♦t♥ ♣rs

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

rs ♦①st♥ íq♦♣♦r

♥só♥ s♣r

r ♥tr♦ó♥

♥só♥ s♣r ② ♣♦t♥ tr♠♦♥á♠♦

♥só♥ s♣r ♥trs íq♦♣♦r ó♥

♥só♥ s♣r ♥trs íq♦♣♦r ró♥

♥só♥ s♣r ♥trs íq♦♣♦r ❳♥ó♥

s♦ró♥ s♦r sstrt♦s ♣♥♦s

í♥tss ♥tr♦t♦r

♦♥s rr♥

P♦t♥s s♦ró♥

P♦t♥

P♦t♥

P♦t♥ ❩

♦♦ ② í♥ ♣r♠♦♦

♦♦ s♠♣ ♣r tr♥só♥ ♠♦♦

st♦s ♣r♦♣♦s s♦r s♦ró♥

s♦ró♥ ó♥ ♥s♠ ♥ó♥♦

s♦ró♥ s♦r s ②

s♦ró♥ s♦r ②

s♦ró♥ s♦r

s♦ró♥ ró♥ ♥s♠ ♥ó♥♦

s♦ró♥ r s♦r ♠ts ♥♦s

s♦ró♥ r s♦r ② 2

s♦ró♥ r s♦r

s♦ró♥ ❳♥ó♥ ♥s♠ ♥ó♥♦

Page 14: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦ró♥ ❳ s♦r ②

s♦ró♥ ❳ s♦r ②

s♦ró♥ ❳♥ó♥ ♥s♠ r♥ ♥ó♥♦

♦♥stró♥ ① s t♥♥ts

s♠♥ s♦r s♦ró♥

s♦ró♥

s♦ró♥ r

s♦ró♥ ❳

♥♦ r♥rs ♣♥s

s♠♥ ♥t♥ts

♥st♦♥s ♣r♦♣s

♦♥♥♠♥t♦ ró♥ ♥ r♥rs ♣♥s rrs

r ♥ r♥rs ♥ír♦ ró♥♦

r ♥ r♥rs ts ♥♦s

♠♣rtr í♠t r♣tr s♠trí

♦♥♥♠♥t♦ ❳♥ó♥

❳ ♥ r♥rs rrs ts ♥♦s

❳ ♥ r♥rs rrs ♥s♦

❳ ♥ r♥rs rts ♦♦

♦♥♥♠♥t♦ ó♥

♦♦♥s ♦♥ ♣rs s♠étr♦s ó♥

♦♦♥s ♦♥ ♣rs s♠étr♦s ó♥

♥áss s♦ró♥ s♦r ♦♦

s♠♥

♣é♥

P♦t♥ ❲

♦♥s♦♥s

Page 15: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 16: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

srr♦♦ ss

r♥t ♦s út♠♦s ñ♦s ♦ r♥♦ ♥trés t♥t♦ ♣rt ís ♦♠♦ qí♠ ♣♦r st♦

s ♣r♦♣s tr♠♦♥á♠s ② strtr ♠r♦só♣ ♦s s♦r♦s s♦r sstrt♦s só♦s

s ♥st♦♥s srr♦s ♥ st ss stá♥ r♦♥s ♦♥ ♥ t♠ q s♣rtó ♥str r♦s

♥♦ ①♠♥á♠♦s ♣r♦♣s ♥♦ r♥rs ♦♥ ♦s s♠♣s

② ♠ás ♦s és ♥ ♥ ② ss ♦♦r♦rs str ♥♦ r♥rs ♣♥s s♠étrs

♠♥t té♥ ♥á♠ ♦r ♥♦♥trr♦♥ q ♦ rts ♦♥♦♥s ♦s ♣rs ♥s ♥♦

t♥♥ s♠trí ♣♦t♥ q r ♣r ♣rs é♥ts s♦r ♦ ❬ ❪ s♣♦♥ ♥r♥

♥ ♣♥♦ xy s ♣rs r♥r ② q ♣r ♥s s ♥ó♥ ♦♦r♥ z ♣r♣♥r

s ♣rs st ♠♥r ♣rí ♥ó♠♥♦ r♣tr s♣♦♥tá♥ s♠trí st t♦ ♣r

♥♦ ♥tró♥ ♥tr sstrt♦ ② ♥ ♣rtí ♦ ♥♦ s ♠♦ ♠ás rt q ♥tró♥ ♥tr

♣rtís ♦ ♥trés ♣♦r t♠ s ♥r♠♥t♦ ♥ ♦s út♠♦s ñ♦s ♥t♠♥t r♠ ② ♥st♥ ❬❪

♥③r♦♥ ♥♦ r♥rs 2 ♦♥ r ♣♥♦ ♦rí ♥♦♥ ♥s ♥♦♥tr♥♦

q ♣r rts t♠♣rtrs ♣r t♦ ♦ s q ♣rs s♠étr♦s t♥♥ ♠♥♦r ♥rí r q

♦s s♠étr♦s q♦s á♦s r♦♥ r③♦s ♠♥t♥♥♦ ♦s t♠♣rtr T ② ♥ú♠r♦ ♣rtís

♣♦r ♥ ár ♥ ♣r n = N/A st♦ s s ♦♥srr♦♥ r♥rs rrs q ♦rrs♣♦♥♥ ♥s♠

♥ó♥♦

s♥♦ ♦s á♦s r♠ ② ♥st♥ ♦♥stt♠♦s q st♦s t♦rs tr♦♥ ♥tró♥ ♥tr ♦

② s ♣rs ♣♥tá♥♦s ♦str♠♦s q ♠♥♥♦ ♣♥t♠♥t♦ s♣r♥ ♦s ♣rs s♠étr♦s

❬❪

st♦s út♠♦s rst♦s ♥♦s ♥r♦♥ sr ♦s sst♠s ♠ás ♣r♦♣♦♥s ♣r ♥ ♣♦s r③ó♥

♥♦♥tr♠♦s q ♦s ss ♥♦s r r ② ❳ s♦r♦s s♦r sstrt♦s ♠ts ♥♦s s

② s♦♥ ♦s sst♠s ♠ás ♦s ♥r♠♦s st♦ st♦s sst♠s t③♥♦ ♥ rsó♥

♣r♦♣st ♣♦r ♥♦tt♦ ② ♦♦r♦rs ❬ ❪ ② ♦s ♣♦t♥s s♦ró♥ rsts ♣r♦♣st♦s ♣♦r ③♠s②

♦ ② ❩r♠ ❬❪ ♥ ♠r♦ ♥♦♥tr♠♦s q st ♦r♠ó♥ t♥ ♣r♦♠s ♥ r♥♦ t♠♣rtrs

r♥♦ tr♣ Tt ♣♦r ♠♣♦ ♠♣♦s r t♥só♥ s♣r ♣r Tt ≤ T <

❬❪ rró♥♦ rst♦ ♣r s♦tr♠ ♥ sst♠ r2 ❬❪ ♥t♠♦s q ♥♦♥♥♥t ♦

♣r♦♦ ♣♦t♥ ♥tró♥ ♥tr ♣rtís ♦ Pr♦♣s♠♦s ♦tr ♦r♠ ♣r s ♥tró♥

♣rs ② r♠♦s q ♦t♥♥ s♦♦♥s ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr ♣♥t♦ tr♣ ② rít♦

Page 17: Adsorción de fluidos sobre sustratos sólidos, estudiada

Tt ≤ T ≤ Tc ♥ ♣rtr ♣r♠♦s ♦rrt♠♥t s t♥s♦♥s s♣rs ② r ❬ ❪

♥ts ♥③r ♥♦ r♥rs st♠♦s s♦ró♥ ss ♥♦s s♦r ♥ s♦ ♣r ♣♥ ♠ts

♥♦s ② ♥♦s ♦tr♦s sstrt♦s ❬ ❪ ♠♦s s♦tr♠s s♦ró♥ ② ♣rs ♥s ♣r

s♦s sst♠s ♥ ♦s s♦s ♦♥ í r♦s ♥ r ❲s ♠♦s s ♦♥str♦♥s ① ♣rt♥♥ts

② ♦t♠♦s í♥s ♣r♠♦♦ ♦ r♦ sts í♥s q ♦♠♥③♥ t♠♣rtr ♠♦♦ Tw

♦①st♥ ♥ ♣í ♥ ♦♥ ♦tr rs q ♠ q T ♠♥t s ♣r♥ ③ ♠ás st rs

s rít ♣r♠♦♦ Tcpw ①st♥ sts í♥s ♣r♠♦♦ ♥ q ② tr♥s♦♥s

s ♣r♠r ♦r♥ ♥③á♥♦s tr♠♥♠♦s Tw ② Tcpw ♦♠♣ró♥ ♦♥ t♦s ①♣r♠♥ts ② ♣rs

♥s ♦s ♦♥ s♠♦♥s ♦♥t r♦ s ①t♦s

♦♥t♥ó♥ ♥③♠♦s ♥♦ r♥rs ♣rs é♥ts q ♦♠♦ ② ♦ í♠♦s sñ♦ ♥tr♦r

♠♥t ♣r♦♥ s♦r ♦ ♥ ♣♦t♥ s♠étr♦ rs♣t♦ ♣♥♦ ♣r♦ s ♣rs q ♣s ♣♦r ♥tr♦

r♥r ♥♦♥tr♠♦s q s s♦♦♥s q ♥ st♦s ♥♠♥ts ♦♥ ♣rs ♥s s♠étr♦s

♣r♥ ♥ sst♠s q ①♥ í♥s ♣r♠♦♦ ❬ ❪ t♦ ♦rr ♥tr♦ ♥ tr

♠♥♦ r♥♦ n ② s♣r ♣♦r ♦♠♣t♦ ♥♦ T s♣r ♥ ♦r rít♦ Tsb ❯♥ ♥áss t♦ ♠str

q t♦ ♦♥t♥ú ♣r T > Tw st ♥③r Tsb q rst sr Tcpw ♦rrs♣♦♥♥t

♦♠♥ó♥ sstrt♦♦ st st ♠♥r tr♠♥♠♦s q ② ♥ ♦rrs♣♦♥♥ ♥tr í♥s

♣r♠♦♦ ② ♣rs ♥♠♥ts s♠étr♦s ♥ ♥ rsr♦r♦ rr♦ st♦s st♦s s♠étr♦s ♥ ♣r♥♣♦

♣♦rí♥ st③rs

♥ ♠r♦ ♦s ①♣r♠♥t♦s ♥r♠♥t s r③♥ ♥ ♦♥tt♦ ♦♥ ♥ rsr♦r♦ q ♣r♠t ♥ rrstrt♦

♥tr♠♦ ♣rtís ♥♦ ♣rsó♥ ♦ s q♥t ♣♦t♥ qí♠♦ µ ♥ sts ♦♥♦♥s T ② µ

♦♥st♥ts ② q str sst♠ ♥ ♠r♦ ♥s♠ r♥ ♥ó♥♦ s♦♠♦s s ♦♥s

♥ st stíst ② ♦t♠♦s s♦tr♠s s♦ró♥ ♦♥ ♦s ♠s♠♦s st♦s sts ② ♠tsts q ♦♥

♥ sq♠ ♦s st♦s ♥♠♥ts s♦♥ q♦s q t♥♥ ♠í♥♠♦ r♥ ♣♦t♥ ♥♦

♥rí r ①r st ♦♥ó♥ q ♥ s♦♦ st♦ s♠étr♦ st q q t♥ ♦s ♥

♣r ♣í ♥ ② ♦s ♦tr ♣r ♣í rs q ♦①st♥ ♥ s♦ s♦ró♥ s♦r

♥ s♦ ♣r st st♦ t♥ ♠s♠♦ r♥ ♣♦t♥ q ♦s ♣rs s♠étr♦s ♦♥ ② ♥ ♣í ♥

♦s ♥ s ♣rs ♦ ♥ ② ♥ ♣í rs ♦s ♥ s ♣rs ❬ ❪

♥áss sst♠s rsts ♦ ♦ ♥ ♠r♦ s t♦t♠♥t ♦r♥

Page 18: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♥tr♦ó♥ ♥r

♦s ♠♣s

♦s ♦s s♠♣s s♦♥ q♦s ♦♥stt♦s ♣♦r ♣rtís át♦♠♦s ♦ ♠♦és s♥t♠♥t s♠étrs ♦♠♦

♣r q ss ú♥♦s r♦s rt s♥ ♦s trs♦♥s ❯♥ ♠♣♦ ♦ s♦♥ ♦s ♦s ♦♥stt♦s ♣♦r

ss ♥♦s st♦s stá♥ ♦♥♦r♠♦s ♣♦r át♦♠♦s ♣♦rs s♥ ♠♦♠♥t♦ ♣♦r ♣r♠♥♥t ♦♥ s r③s

♥tró♥ s♦♥ s ♣ró♥ ♠♦♠♥t♦s ♣♦rs tr♥st♦r♦s ♦s ♠♦♠♥t♦s tr♥st♦r♦s sr♥ ♦♠♦

rst♦ s t♦♥s ♥ s str♦♥s ♦s tr♦♥s q ♦♥♦r♠♥ s ♥s tró♥s ♦s

át♦♠♦s ♦ ♠♦és ♦♠♦ ♦♥s♥ st tó♥ ♥ ♥♦ ♦s át♦♠♦s ♣ ♣rr ♥ ♠♦♠♥t♦

♣♦r tr♥st♦r♦ q ♥ ♦tr♦ ♠♦♠♥t♦ ♣♦r ♥ át♦♠♦ ♥♦ ♥ó♠♥♦ ♦♥♦♦ ♦♠♦ ♥tró♥

s♣rsó♥ ♦ ♦♥♦♥ ❯♥ rsó♥ ♠② t r st t♠át ♣ ♦♥strs ♥ ❬❪

s t♦♥s ♥ ♠♦♠♥t♦ ♣♦r s♦♥ ts q ♥ ♣r♦♠♦ ♥ ♥ ♦r ♥♦ ♥ ♠r♦ s r

♦r♥tó♥ ♣♦r q s ♥r ♥tró♥ q s st ♦♥ át♦♠♦ ♠♦é ♥♦ ♥♦ s ♦♥sr

q ♣rt♣♥ ♥♦ ♠ás ♦s át♦♠♦s ♠♦és s s♠♣r trt

♣♦r③ ♣♥ t♣♦ sst♥ ♣r♦ ♥ st♠ó♥ s ♥rís ♥♦rs ♥ sts ♥tr

♦♥s s ♠t ♥ ♦r ♥♦ s♣r♦r ♥ ♠♦ ♥ ♠②♦rí ♦s s♦s P♦r ♠♣♦ ♣r

s♦ r ♥ s s íq t♠♣rtrs ♥tr tr♣ ② rít ♥rí ♥tró♥ ♥tr ♦s ♣♦♦s

♥♦s s ♠♦ r ♥ ③ s ♥r♦r s ♥rís ♥♦rs ♥ ♣♥ts r♦♥♦

♦♠♦ ♦s q s ♥r♥ ♥ s♦ ② ♥s ♥ s ♠♥♦r s ♦s ♦♥s ♥ só♦s rst♥♦s

P♦r ♦tr♦ ♦ ♥♦ ♦s ♦♥stt②♥ts sts sst♥s s ♥ t ♠♥r q s st♥ s rt♠♥t

♣qñ s r③s r♣ss q ♣r♥ ♥tr ss rs♣ts ♥s tró♥s ② ♥tr ♦s ♥ú♦s ♣r♦♠♥♥

♣♦r s♦r s trts ② ♥rí ♥♦r r ♥ r♦s ór♥s ♠♥t

á♦ ♠♥t ♣♦t♥s r♣s♦s s ♠② ♦♠♣♦ ② rqr rs♦r ♣r♦♠ ♦rrs♣♦♥♥t

strtr tró♥ sst♠ ♥♦ s ♣r♦ s♦♣♠♥t♦ ♥tr át♦♠♦s ♦ ♠♦és s t♥r ♥

♥t rátr r♠ó♥♦ ♦s tr♦♥s t♦r q r ♦♠♣ ♣r♦♠ ♥ ♠r♦ ♣r ♠♦s

♣r♦♣óst♦s st sr q r♣só♥ ♠♥t rá♣♠♥t s♠♥r st♥ ② q ♣r s sr♣ó♥

♣♥ ♠♣rs ①♣rs♦♥s ts ♦♠♦ Bexp(−αr) ♦♥ r s st♥ ♥tr át♦♠♦s ♦ ♠♦és ② ♦s

♣rá♠tr♦s B ② α ♣♥♥ ♥tr ♦trs ♦ss t♣♦ sst♥ st ①♣rsó♥ sr ♥ ♠á♥ á♥t

❬❪ ♣ rrs B/rn ♦♥ r♦ ♦♥ ♦s t♦s ①♣r♠♥ts n ♣ t♦♠r ♥ ♦r ♥tr ②

Pr ♥tr♦♥s ♥tr át♦♠♦s q ♦♠♣♦♥♥ ♦s ss ♥♦s n = 12 s ①♣♦♥♥t q ♠♦r ♣r ♦s t♦s

♠♣ír♦s

♥ss rt♠♥t ts ♦♠♦ s q ♣r♥ ♥ ♥ s íq ♥ ♦♥♦♥s ♥♦r♠s s♦♥ s r③s

Page 19: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♣ss s q tr♠♥♥ strtr ♦ st ♠♥r s s ♦♥♦ strtr ② tr♠♦♥á♠

♥ ♦ ♣r♠♥t r♣s♦ s r③s trts ♣♥ trtrs ♦♠♦ ♥ tér♠♥♦ ♥♥♠♥t ♣rtrt♦

♣r♦♠

sí ♥ st ♦♥t①t♦ ♥ ♠♦♦ ♦ ♣r str ♦s s♠♣s ♦♥sst ♥ ♦♥srr♦s ♦♠♦ ♥ ♦♥♥t♦

♣rtís ♠♦♦ srs rs ♦♥ ♥tr♦♥s trts

♦rí ♥♦♥ ♥s

r ♥tr♦ó♥ stór

♦rí ♥♦♥ ♥s ♦♥stt② ♥ rr♠♥t ♦s ♣r str ♦♠♣♦rt♠♥t♦

♦s ♦s ♥ s srr♦ó ♥ ♦♠♦ ♣r♦♠♥t♦ tr♥t♦ rs♦ó♥ ó♥

rö♥r ♣r ♣♦r ♣r♠r ③ ♠♥r ♠② ♣r♠♥r ♥ ♥♦ ♦s tr♦s ♥ r ❲s

❬❪ r♦♥♦ ♣r♦♠s ♥trss ♥♦ ♦♠♦é♥s ♥ sst♠s síq♦

tr♦ ♥ r ❲s ♥♦ t♦ ♠②♦r trs♥♥ ② ♦ q s♣rr st é ♦♥

♦r ♥t♦ s ♣r♠rs ♥♦♦♥s ♥ t♦rí ♥♦♥ ♥s r♦♥ srr♦s ♥

♣♦r ♦♠s ② r♠ st♦s t♦rs rr♦♥ ♥ ♣r♠r rsó♥ t♦rí ♥♦♥ ♥s ♥

♦♥t①t♦ ís tó♠ ♥♦ st♥ ♣r♦♠ r ♥rí ♥ át♦♠♦ r♣rs♥t♥♦

s ♥rí ♥ét ♦♠♦ ♥ ♥ó♥ ♥s tró♥ ② ♦♠♥♥♦ st♦ ♦♥ s ①♣rs♦♥s áss

s ♥tr♦♥s ♥ú♦tró♥ ② tró♥tró♥ q t♠é♥ s ♣♥ r♣rs♥tr ♥ tér♠♥♦s ♥s

tró♥ ❯♥ ñ♦ ♠s tr ♠♦♦ ♦♠sr♠ ♠♦r♦ ♣♦r r q♥ ñó ♥ ♥♦♥

♦rrs♣♦♥♥t ♥rí ♥tr♠♦

Ps ♦s ♦r♦s ♥③♦s ♥ s ♠♦♠♥t♦ t♦rí ♦♠sr♠r ♥♦ rst s♥t♠♥t ♣rs

♣r ♠②♦rí s ♣♦♥s st t ♣rsó♥ st ♦♥ ♠♥r ♣♦♦ r♣rs♥tr

tér♠♥♦ ♦rrs♣♦♥♥t ♥rí ♥ét ♦♠♦ ♥ ♥♦♥ ♥s tró♥

s tór ♣r t ré♥ ♥ ♣♦r ♦♥r ② ♦♥ q♥s ♠♦strr♦♥ q

♥rí ♣♦í ①♣rsrs ♦♠♦ ♥ ♥♦♥ ♥s ② q ♠ás ♥s rr sst♠ s q

♠♥♠③ st ♥♦♥ t♦r♠ ♦♥r ② ♦♥ ❬❪ s á♦ t♥t♦ ♣r ♦s♦♥s ♦♠♦ ♣r r♠♦♥s

♣ó♥ ♠ás ♠♣♦rt♥t t♦rí ♣ró ñ♦ s♥t ♥♦ ♦♥ ② ♠ ♠♦strr♦♥ q ♣rtr

s ♣♦s srr ♥ ó♥ ♣r ♦rts ♥ ♣rtí ♦s s s ♦t♥ ♥s tró♥

st ♦r♠ó♥ ♥ ♥t♦♥s ♦♠♦ ♥ t♦rí ♥♦♥ ♥s tró♥ s♥ ♠r♦ ♥♦ st

♠♦s ♦s ñ♦s ♥♦ s ♦♥tr♦♥s ♦♥r ♦♥ ② ♠ str♦♥ ♦r♠s♠♦

tór♦ ♥ q s s ♠ét♦♦ s♦ t♠♥t

♥ ♦♥ ró ♣r♠♦ ó í♠ ♣♦r ss ♣♦rts srr♦♦

ás tr ♦ q ♦r♥♠♥t s srr♦ó ♥ ♠r♦ t♦rí á♥t ♥♦ rtst ♦♥ át♦♠♦s

st♦♥r♦s s ①t♥ó ♦♠♥♦ ♠á♥ á♥t ♣♥♥t t♠♣♦ ② st♦ ♠tr

♦♥♥s ♥ ♥ ② r♦ss ♣r♦♥ ♥r③ó♥ t♦r♠ ♦♥r ② ♦♥ ♣r s♦

♣r♦♠s ♣♥♥ts t♠♣♦ ♦ ♦♥♦♥s s♥t♠♥t ♥rs ♦ q s♥tó s ss ♣r

♥♦♠♥ ♦rí ♥♦♥ ♥s ♣♥♥t ♠♣♦ ♦ ♥ ss ss ♥ ♥s ②

♦② í ② s ♥s ♣ó♥ st ♦r♠s♠♦ ♥ ♦♠♥♦ rtst

♥ t ♦s ♠ét♦♦s á♦ r♦s ♦rí ♥♦♥ ♥s s♦♥ ♦s ♠ás t③

♦s t♥t♦ ♥ ♣r♦♠s r♦♥♦s ♦♥ strtr tró♥ ♠tr ♦♠♦ ♥ ís ♠tr

♦♥♥s ♥ ♥r ② ♥ qí♠ á♥t

Page 20: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥ rs♦ó♥ ó♥ rö♥r ♣r♠t srr ♦r♠ ①t ♦♠♣♦rt♠♥t♦ sst♠s

♠r♦só♣♦s s ♣ ♣ró♥ s ♠t ♣♦r ♦ q ss ♦♥s s♦♥ ♠s♦ ♦♠♣s

rs♦r ♥♠ér♠♥t ♦ ♠♥♦s ú♥ ♥ít♠♥t ♦♥ s ♣♦ ♦rr st ♣r♦♠ r♦r♠á♥♦♦

♣r sr ♣③ ♦t♥r ♣♦r ♠♣♦ ♥rí ② stró♥ tró♥ st♦ ♥♠♥t ♣rs♥♥♦

♥ó♥ ♦♥ sst♠ ❯♥ ♥t s♥ ♦r á♦ r ♥ q ♥s ♥ sst♠

N ♣rtís s ♥ ♠♥t ♠♦ ♠ás s♠♣ q ♥ó♥ ♦♥ ♣s ♥ ♣r♥♣♦ r♥ q

♣♥ s♦♦ rs s ♦♦r♥s ♣♥t♦

❯♥ s♥t s q s♦ ♥ ♦s s♦s ♠ás s♠♣s ♥♦ s ♦♥♦ ♠♥r ①t ♥♦♥ q r♦♥

♥s ♦♥ ♥rí sst♠

♣rtr ♦s ñ♦s ♦r♠s♠♦ ♠♣♠♥t t③♦ ♣r á♦s ís st♦

só♦ s♥ ♠r♦ s ♦♥sr q ♥♦ r ♦ st♥t ♣rs♦ ♥ á♦s t③♦s ♥ ♦♥t①t♦ qí♠

á♥t

♠é♥ ♥ s♦s ñ♦s st ♦r♠ó♥ s ♣♦ s♦ ♦s ♦♠♦é♥♦s ♦♥sr♦s ♦♠♦ ♥ ♦♥♥t♦

srs rs ♦♥ ♥tr♦♥s t♣♦ trts ♦♥ rs♣t♦ ♦♥tró♥ s s í♥ ♣r♦♣st♦

rs ①♣rs♦♥s rrs ♣r r♣rs♥tr s♠ ♦s tér♠♥♦s ①♣♥só♥ ♦rrs♣♦♥♥t ♥rí

r ♦♠♦ ♣♦r ♠♣♦ ♦r♠ s ①t r♥♥ ② tr♥ ❬❪

♥s é s ♦♠♥③ó str sst♠s ♥♦ ♦♠♦é♥♦s ♦♠♦ ♦s q ♣r♥ ♥♦ ♥

♦ s s♦r s♦r s♣r ♥ só♦

♥ s és ♦s ② ♦s s ♥tr♦r♦♥ ♠♦rs ♥ ①♣rsó♥ ①s♦ ♥rí r s

♦♠♣♦♥♥t s♥ t♦rí Pr♠r♦ s s♣s♦ q s tér♠♥♦ í ♣♥r ♥ ♥s ♣r♦♠

s♦r ♥ sr á♠tr♦ s srs rs q ♦♠♣♦♥í♥ ♦ st ♣r♦♠♥t♦ q stá

♣♦ ♥ ♥ tr♦ r③♦♥ ❬❪ ♦♥t♥í ♣rá♠tr♦s q s st♥ ♣r r♣r♦r ♥ó♥

♦rró♥ ♦s r♣♦s

♥ s ♣r♦♣s♦ ♦tr ①♣rsó♥ ♣r ①s♦ ♥rí r s q ♥♦ ♦♥t♥í ♣rá♠tr♦s rs

♠ás ♦rrs♣♦♥♥t á♠tr♦ s srs rs q r♣rs♥t♥ át♦♠♦s ♦ ♠♦és ♦

st ♣r♦①♠ó♥ ♣r♦♣st ♣♦r ♦s♥ ❬❪ ② r♦r♠ ♣♦r r ② ♦s♥r ❬❪ s ♦♥♦ ♦♠♦ ♦rí

s s ♥♠♥ts

t♦rí ♣ ♦s s♣t♦s ♥tí♦s ② t♥♦ó♦s

s ♣♥t♦ st ♥tí♦ st♦ st♦ íq♦ ♣♥t ♥♦s sí♦s s♥♦ st♦ ♠tr

q ♣rs♥t ♠②♦r t ♣r s ♦♠♣r♥só♥ ♥trs q ①st♥ ♥♦s ♠♦♦s tór♦s ♣r só♦s ②

ss ♥ ♥♦ s ♣♦s ♦t♥r ♥♦s ♠♦♦s ♣r rátr ♥tr♠♦ ♥tr st♦s ♦s st♦s ♠tr

r♥t st s♦ s ♥ tr♠♥♦ ①♣r♠♥t♠♥t ♦♥ ♥ ♣rsó♥ s ♣r♦♣s tr♠♦♥á♠s

♥ r♥ ♥ú♠r♦ íq♦s ♦ q ♣r♠t r ♦s rs♦s ♠♦♦s srr♦♦s ♦♥trst♥♦ ♦s rst♦s

q ♣r♥ st♦s ♠♦♦s ♦♥ ♦s t♦s ♠♣ír♦s

st♦ st♦ íq♦ t♠é♥ rst r♥ ♠♣♦rt♥ s ♥ ♣♥t♦ st t♥♦ó♦ ♣s st

r♦rr q ♠②♦r ♣rt ♦s ♣r♦s♦s ♥strs t♥♥ r ♥ st♦ íq♦ ♥♥rí í♠

♠♦r♥ s ♥r♥t r♦ ♣r♦♠s q rqr♥ ♦♥♦♠♥t♦ ó♥ st♦ ♥ íq♦

♣r♦ ♦ ♥ ♠③ íq ♥t♣í ♣♦r③ó♥ ♣ ♦rí t Pr tr♠♥r sts

♣r♦♣s s t③♥ ♥r♠♥t ♦♥s st♦ ♠♣írs

s ♦♥s st♦ ús ♦♥stt②♥ s♥ s ♠ás ♣♦♣rs ♦ s s♠♣ ♥ r ❲s

♣r♠r♦ ♥ ♣r♦♣♦♥r st t♣♦ ♦♥s s ♥t♦♥s ♥ ♣r♦ ♦trs s♥ s♣r♦rs ♦♠♦

Page 21: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦♥ ó♥ ♦♥♦ ② P♥♦♥s♦♥ ♦s sts ♦♥s ♦♥s ♥ ♥ ♣r♥♣♦

♣r sst♥s ♣rs ♥ s♦ ①t♥s ♠③s t③♥♦ s ♥♦♠♥s rs ♠③ s ♣♥t♦

st t♥♦ó♦ s rts st t♣♦ ①♣rs♦♥s s r♦♥♥ ♥♦ s♦♦ ♦♥ s s♥③ s♥♦ ♠ás ♦♥

r♣③ ♦♥ q ♣r♠t♥ r ♦ ♦s á♦s rtrísts s♣♠♥t ss ♥♦ á♦

♣r♦♣s tr♠♦♥á♠s ♦♣r s♦♦ ♥ ♣qñ ♣rt t♠♣♦ ♠♣♦ ♥ sñ♦ ♣r♦s♦

♥str P♦r ♦tr♦ ♦ ♦ ♥♠♥t♠♥t s é♥ss s ♣♦ss ♠♦rr s ♣r♦♥s q

s ①tr♥ s s♦♥ ♠② ♠ts s s♦♥s rs♣t♦ ♦s rst♦s ①♣r♠♥ts q s ♦t♥♥

♣rtr sts ♦♥s ♠str♥ ♥ ♦♠♣♦rt♠♥t♦ rrát♦ q ♦ rátr ♠♣ír♦ s ♠s♠s

♠♣♦s tr tr♠♥r ♦♥ ♣rsó♥ ♦r♥ ts ♥s

♥ s♦ s ♠③s rátr ♣rt♦ s ♦♥s st♦ ús ♠♣írs s ♠② ♠t♦

Ps q t③ó♥ ①♣rs♦♥s ♠♣írs s ♦♣♥♦ ♥ r♦ ♠♣♦rt♥t ♥ t rst ♥t

q ♥ ♠♦r sst♥ ♥ ♣rsó♥ ♦s rst♦s ♦t♥♦s t♥t♦ ♣r sst♥s ♣rs ♦♠♦ ♣r ♠③s

só♦ s ♦♥srá t♥♥♦ ♥tr③ ♠♦r s ♥tr♦♥s ♥tr ♣rtís ② t③♥♦ ♠ét♦♦s

q s ♣♦②♥ s♦r s r♠ r ♣♦r á♥ stíst

P♦r ♦tr♦ ♦ ♥ st♦s út♠♦s ñ♦s ♦ ♥ ♣rt srr♦♦ ♥♥♦t♥♦♦í ♦r♠s♠♦ ♦ró ♥

♥♦ ♠♣s♦ ♥ s ♣ó♥ sst♠s ♦♥stt♦s ♣♦r ♦s s♦r♦s s♦r sstrt♦s só♦s ♣

t ♠♥♣ó♥ ♠tr ♥ s ♠♦r ② tó♠ ♣r♠t sñ♦ ② ró♥ ♦s ♠ás

rs♦s s♣♦st♦s q ♦♥tr♦♥ ♠♥♠♥t♦ ró♥ ② ró♥ rs♦s ♦s ♥tr sí ② ♦♥

♠trs só♦s ② ♥♦s ♦♥t♥♦ ♦♥ ♥s ás ② ♦♠♣rts ♥ ss q ♥ s ♠ró♠tr♦s

st ♥♥ó♠tr♦s ❯♥ ♣♥♦r♠ ♦s st♥t♦s t♣♦s ♣♦♥s ♣♦ss s s♣♦st♦s ♥strs st

♣rt♦s sr t③♦s ♥ ♦♦í ② ♠♥ stá rs♠♦ ♥ ♥ tr♦ qrs ② ❬❪

tr ♣ó♥ t♥♦ó s♠ ♠♣♦rt♥ st r♦♥ ♦♥ t③ó♥ ró♥♦ ♦♠♦ ♥t

♥rí ♥ ♣rtr ♠♥♠♥t♦ ró♥♦ ♠♦r ♦♥♥♦ ♥ r♣♥♦ stá trt♦ ♥

❬❪

P♦r t♦♦ ♦ ♦ ♥ts s ♦♥♥♥t ♦♠♣r♥r ♦s ♥ó♠♥♦s ♦s ♦♥ s♦ró♥ ♦s s♦r

s♣rs strtr ♦ s♦r♦ ♥ ♥ só♦ q tr♠♥ ♣♦r ♥ ♥ s ♥tr♦♥s

só♦♦ ② ♦♦ ♦ s♦r♦ ♣ ♣rs♥trs ♦♠♦ íq♦ ♦ ♣♦r ♦ ♥s ♥ s só

♣♥♥♦ ♥s ♦ ♥r♠♥t ♦ ♠ás r♥♦ sstrt♦ stá ♥ s íq ♦ ♥s

só ♠♥trs q ♠ás ♦ s ♥♥tr ♥ s s♦s st♦s sst♠s s♦r♦s ♣rs♥t♥ ♥trss

íq♦♣♦r ②s ♣r♦♣s strtrs ② tr♠♦♥á♠s s♦♥ ♣r♦s♠♥t ♥③s ♥ ♦r♠ tór

trs rr♠♥ts tórs

♥ ♥r ♦s trt♠♥t♦s ♥trss s♦♥ ♥trí♥s♠♥t t♦s♦s ♣♦rq ♣rs♥t♥ ♣rs ♥s

q ♣♥♥ ♣♦só♥ ♦♥ ♠ás ♦s r♥ts ♣♥ sr ♠② ♥t♥s♦s Pr rs♦r st s

sst♠s s ♣♥ ♣r ♠ás t♦rí ♥♦♥ ♥s ♠ét♦♦s s♦s ♥ s♠♦♥s

♦♥t r♦ ♦ ♦rt♠♦s á♦ q t③♥ ♦r♠s♠♦ ♥á♠ ♦r ♥tr ♦tr♦s ♥ r♦s

r♦s r♥t ♣ó♥ s ♣♥ ♥♦♥trr rsú♠♥s ♥rs ♦ó♥ sts ♦r♠♦♥s r

♣♦r ♠♣♦ s rr♥s ❬ ❪

♦♠♥③r♠♦s st ♣rt♦ ♦♥ ♥ r rs♠♥ r sts ♦trs rr♠♥ts

s t♦rís ♠♦r♥s st♦ íq♦ q ♦♠♥③r♦♥ ♦♠♦ ♥ ♥t♥t♦ srr ♦♠♣♦rt♠♥t♦ tr♠♦

♥á♠♦ íq♦s s♠♣s ♦♠♦ ♦s ♦♥stt♦s ♣♦r ss ♥♦s ♥ st♦ íq♦ ❬❪ ♣♥ r♣rs ♥ trs

r♥s ♠s

ét♦♦s ♠ó♥

Page 22: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦rís ♦♥s ♥trs

♦rís ♣rtr♦♥s

ét♦♦s ♠ó♥

rs ♥♦r♠ ♥ ♦r♦ ♥ srr♦♦ ♦s sst♠s ó♠♣t♦ s ♦ ♣♦s tr♠♥r s

♣r♦♣s tr♠♦♥á♠s rs♦s ♦s ♠♥t s♠♦♥s ♦♠♣t♦♥s t③♥♦ ♦s srr♦♦s

tór♦s q s s♣r♥♥ á♥ stíst r ♣♦r ♠♣♦ ❬❪

s té♥s s♠ó♥ ♦♠♣t♦♥ ♦♠♥③r♦♥ srr♦rs ♣rtr ♦s ñ♦s ♦♥ ♥♠♥t♦

♠♦r♥s ② ♣♦r♦ss ♦♠♣t♦rs

s s♠♦♥s ♦♠♣t♦♥s rqr♥ ♦♠♦ ♥♦r♠ó♥ ♥tr ♣♦t♥ ♥tr♠♦r P♦r ♦tr♦ ♦

tr♠♥ó♥ ♣♦t♥ ♥tró♥ ♥tr át♦♠♦s ♦ ♠♦és s ♥ ♣r♦♠ ♥♦ t♦♦ rst♦ q

♥♦ ♥ á♠t♦ á♥ á♥t ♦s ♣♦t♥s ♥tr♠♦rs ♦t♥♦s trés á♦s

♠á♥♦á♥t♦s s♦♥ t♦í ♣♦♦ ♣rs♦s ♦ rt♠♥t ♥①st♥ts st♦ s ñ t r♦♥

♦♥ ♥tró♥ ♥tr trs ♦ ♠s r♣♦s q ♥ ♠♥r s ss♥ t③♥♦ ♣♦t♥s t♦s Pr

tr♠♥r s ♣r♦♣s tr♠♦♥á♠s st♦ íq♦ ♣ sr ♥sr♦ ♥ ♦♥♦♠♥t♦ ♣♦t♥

q s ♦r♥ ♥tr ♠ás ♦s r♣♦s ♣s ♥ st st♦ át♦♠♦s ♦ ♠♦és ♣♥ ♥trtr ♥♦ s♦♦

♣rs ♥ t s ♦♥♦ ♠② ♣♦♦ ♥ rr♥ ♣♦t♥s ♥tró♥ q ♥♦r♥ ♠ás

♦s r♣♦s P♦r st r③ó♥ t♦♦s ♦s ♠ét♦♦s s♠ó♥ ts s♦s ♥ r♠♦♥á♠ stíst

t③♥ ♦♠♦ ♣♥t♦ ♣rt ♣♦t♥s ♣rs ♠♣ír♦s ♦ s♠♠♣ír♦s q ♣♥ ♦♥srrs ♦♠♦

♣♦t♥s ♣rs t♦s q ♥ ♥t ♥t♦♥s ♣rs♥ st t♣♦ ♥tr♦♥s

s té♥s s♠ó♥ t♠♥t t③s s♦♥ ás♠♥t ♦s s♠ó♥ ♦♥t r♦

❬❪ ② ♥á♠ ♦r ❬❪ ♥ ♠s s tr ♦♥ ♥♦s ♣♦♦s ♠s ♠♦és ♣r tr ♥ t♦

♦st♦ ♦♠♣t♦♥ ♣♦só♥ ② ♦ sts ♠♦és ♦♦♥♥ ♦r tr♠♥s ♦♥s

♠♦♠♥t♦

♥ s♦ s♠ó♥ ♦♥t r♦ s s q s r♥ts ♦♥r♦♥s q s ♥ ♥r♥♦ rst♥

♣r♦♣♦r♦♥s t♦r ♦t③♠♥♥ st t♣♦ s♠♦♥s ♣r♦♣♦r♦♥♥ s♦♦ ♣r♦♣s qr♦

sst♠

♥ s♦ ♥á♠ ♦r s rs♥ ♣r ♦♥ró♥ ♥r s ♦♥s ♠♦♠♥t♦

♦♥♥t♦ át♦♠♦s ♦ ♠♦és t♥♥♦ ♥ ♥t s r③s ② ♦s t♦rqs r♦s s♦r ss ♣rtís ♥

st út♠♦ s♦ s ♦t♥♥ t♠é♥ ♣r♦♣s ♥á♠s sst♠ ♥ stó♥

Pr ♠s té♥s ♦s t♠♣♦s ó♠♣t♦ s♦♥ ♥r♠♥t r♥s ② ♠♥t♥ rá♣♠♥t ♦♥ ♥ú♠r♦

♣rtís ♥♦rs

♦rís ♦♥s ♥trs

s t♦rís s♦r ♦♥s ♥trs ♥r♦♥ ♣r♥♣♦s st s♦ ♠r ♦s tr♦s r♥tí♥ ②

❩r♥t q ♦♥r♦♥ ♥♦♠♥ ó♥ r♥st♥❩r♥ ❩ ❬❪ st ó♥ s ♥ r

♥ ó♥ ♥tr q r♦♥ ♥ó♥ ♦rró♥ t♦t ♦♥ ♥♦♠♥ ♥ó♥ ♦rró♥ rt

♣r♦♠ ♥♠♥t s ♦♥s ♥trs s ♥♦♥trr ♥ s♥ ró♥ ♥tr sts ♥♦♥s

♥♦♠♥ ró♥ rr st ró♥ ♣r♠t rs♦r ♦rrs♣♦♥♥t sst♠ ♦♥s r♦

♦r♠s♠♦ s ♣r♦①♠♦♥s t♦rí stá♥ ♣s ♦♥t♥s ♥ ró♥ rr ①st♥ ás♠♥t s

s♥ts r♦♥s rr

ró♥ rr ♦r♠ ♣♦r Prs ② ❨ P❨ ❬❪

Page 23: Adsorción de fluidos sobre sustratos sólidos, estudiada

ró♥ rr ♥ í♣r♦♥t

ró♥ rr ♥ í♣r♦♥t rr♥ ❬❪

♥ ♥ tr♦ rsó♥ ♥s s ♣ ♥♦♥trr ♥ ró♥ ó♥ ❩ ② ♥s ss

r♦♥s rr s ♣rtr t♦rí ♥♦♥ ♥s ❬❪

♦s sts ♦♥s ♥trs s ♥ ♣♦ st♦ íq♦s ♦♥ r♥ts ♣♦t♥s ♣rs ♦♥

st♦s ♣♦t♥s ♥tró♥ ♥r♠♥t ♣♦s♥ s♠trí sér

♥ ♠②♦r ♣rt ♦s s♦s s ♥sr ♥ rs♦ó♥ ♥♠ér ó♥ ♥tr ② ♥ ♠② ♣♦♦s s♦s

s♦ó♥ s ♥ít

Pr ♠♦♦ srs rs ❲rt♠ ❬❪ ♥♦♥tró ♥ s♦ó♥ ♥ít ó♥ ❩ t③♥♦

ró♥ rr P❨ st♦ ♣r♠tó ♦t♥r ♦rs ♥ít♦s ♥ó♥ stró♥ r

P♦str♦r♠♥t ❱rt ② ❲ss ❬❪ ♦rrr♦♥ ♠♣ír♠♥t s♦ó♥ ó♥ ❩ ♦♥ ró♥

rr P❨ ② ♣r♦♣♦r♦♥r♦♥ ór♠s ♥íts ♠ás ♣rss ♣r tr♠♥ó♥ strtr ♥ ♦

srs rs

♦rís ♣rtr♦♥s

s t♦rís ♣rtr♦♥s ♥♥ ♥ ♦s ñ♦s ② s ♣♥ ♦♥ ♥♦s rst♦s r♥t é ♦s

s♥ ♥ ♦ q ♥rí r ♠♦t③ ♥ íq♦ q ♥tr♦♥ sú♥ ♥ ♣♦t♥ U

♣ srr♦rs ♥ t♦r♥♦ ♥ sst♠ rr♥ q ♦♥sst ♥ ♥ ♠♦♦ ♦ ②s ♠♦és

♥trtú♥ sú♥ ♥ ♣♦t♥ U0 ♥♦♠♥♦ ♣♦t♥ rr♥ ♥ s♥t♦ q U = U0 + δU s♥♦

‖δU‖ << ‖U0‖♦s tér♠♥♦s srr♦♦ ♥ sr ♥♦♠♥♦s tér♠♥♦s ♣rtrt♦s ♠♣♥ ♣r♦♠♦s ② t♦♥s

♣♦t♥ ♣rtró♥ ♦ rr♥

ó♥ sst♠ rr♥ stsr ♦s rqst♦s ♥♠♥ts

r♥t③r ♥ rá♣ ♦♥r♥ srr♦♦ ♣rtr♦♥s

Pr♠tr q strtr ② s ♣r♦♣s tr♠♦♥á♠s sst♠ rr♥ s♥ á♠♥t tr♠

♥s

sí ♣r íq♦s s♠♣s ♥♦♥tr♠♦s só♥ ♣♦t♥ rr♥ ② ♣rtró♥ ♣♦r rr ②

♥rs♦♥ ❬❪ ② ♣♦r ♣♦r ❲s ♥r ② ♥rs♥ ❲ ❬❪ ② ♣é♥

♣r♠r ♣♦t♥ sú♥ s s♥♦ ② s♥ sú♥ s♥♦ s ♣r♠r r st♦ s s

r③s ♥tr♠♦rs ♦ ♥trtó♠s

sr ♣rtrt ♦♥r ♦♥ ♠②♦r r♣③ ♥♦ s t③ só♥ ♣♦t♥ sú♥ rtr♦ ❲

q ♥♦ s t③ só♥ ♦♠♦ ♥ ♥ ♣st♦ ♠♥st♦ ♦s st♦s s♠ó♥ s♦♥ s r③s

r♣ss s q tr♠♥♥ ts ♥ss strtr ♦ ❬❪ ♣r♦♦♥♦ ♥ rá♣ ♦♥r♥

srr♦♦ ♣rtrt♦ ♥♦ s ♥②♥ t♦t♠♥t ♥ sst♠ rr♥

sst♠ rr♥ ❲ ♣ r♦♥rs á♠♥t ♦♥ ♥ ♦ srs rs ♣r q s s♣♦♥

♥ ó♥ st♦ t ♦♠♦ r♥♥tr♥ ❬❪ ② ♥ ♣r♠tr③ó♥ ♠② ♣rs ♥ó♥

stró♥ r ❬❪

sí ♣s t③ó♥ ♣♦t♥ ❲ ♥tr♦ ♦s sq♠s ♣rtrt♦s ♣r♠t ♣rr rst♦s q

stá♥ ♥ ♥ r♦ ♦♥ ♦s ①♣r♠♥ts ♦♥ ♥t ♦♣rt rr ♦s t♠♣♦s ♦♠♣t♦ ♥ ró♥

♦s ♠♣♦s ♥ rs♦ó♥ s ♦♥s ♥trs ♦ s s♠♦♥s ♥♠érs

P♦r ♦ t♥t♦ ♣♦♠♦s r♠r q ♣rtr ♦s ñ♦s ② ♣r♠r ♠t ♦s s ♣r♦♥ r rs

♣r♦♣s tr♠♦♥á♠s ♣rtr ♥ ♣♦t♥ ♦ ❬❪

Page 24: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♦rí ♥♦♥ ♥s

♥tr♦ó♥ ♦r♠s♠♦

❯♥ ♠♦♦ ♦ s♠♣ ♦♥sst ♥ ♥ sst♠ N ♣rtís ♠s m q ♥trtú♥ ♥tr s ♥ ♣r♥♣♦

♣rs ♠♥t ♥ ♣♦t♥ U ♦♥sr♠♦s t♠é♥ q ♥ sts ♣rtís s ♥ s

♣♦s♦♥s ri ♣♥ str s♦♠ts ♥ ♣♦t♥ ①tr♥♦ Uext P♦♠♦s srr st sst♠ ♠♥t ♥

♠t♦♥♥♦ ♦r♠

HT =∑

i

− ~2

2m∇2

i +∑

i,j

U (ri − rj) + Uext(r).

s rtrísts íss sst♠ stá♥ ♦♥t♥s ♥ ♥ó♥ st♦ ψ s♦ó♥ ó♥ rö

♥r

HTψ = Eψ.

E r♣rs♥t ♥rí st♦ ψ srá ♥ ♥ó♥ ♣♥♥t ♣r♦r N+1 rs ψ = ψ(r1,r2,........rN,t)

♦ ♥s ♥ó♥ ♥ r♣♦ ♣ sr ♦t♥ ♣rtr ①♣rsó♥

ρ(r1) = N

´

dr2dr3.......drNψ2(r1, r2, ........rN)

´

dr1dr2.......drNψ2(r1, r2, ........rN).

①st ♠ás ♥ sq♠ ♣r♦①♠♦♥s ♣r ♦rr st ♣r♦♠ ♠♦s r♣♦s

❯♥ ♣♦s ♠♥♦ ♣r s trt♠♥t♦ ♣r♦♥ st♠♥t t♦r♠ ♦♥r ♦♥ ❬❪ ② r♠♥ ❬❪

q ♠str ①st♥ ♥ ró♥ ♥í♦ ♥tr ♥s ρ ② ♣♦t♥ ①tr♥♦ ♣♦ sst♠

Uext

Uext(r) ⇐⇒ ρ(r).

Pr ♥str♦ sst♠ N ♣rtís ♦♥ ♥tr♦♥s s♦♠t♦ ♥ ♣♦t♥ ①tr♥♦ ♣♦♠♦s ♦♥strr r♥

♣♦t♥ Ω ♦♠♦ ♥ ♥♦♥ ♥s sst♠

Page 25: Adsorción de fluidos sobre sustratos sólidos, estudiada

Ω[ρ, Uext] = Fint[ρ] +

ˆ

drρ(r)Uext(r)− µN.

♥ st ①♣rsó♥ µ s ♣♦t♥ qí♠♦ ② Fint r♣rs♥t ♥rí r ♥trí♥s ♠♦t③ st s ♥

♦♠♦ ♥rí r sst♠ N ♣rtís ♥♦ ♥♦ ♥trtú ♦♥ ♥♥ú♥ ♠♦ ①tr♥♦

♥ú♠r♦ ♣rtís s ♣ ①♣rsr ♥ ♥ó♥ ♥s trés ①♣rsó♥

N =

ˆ

ρ(r)dr,

♥t r♥ ♣♦t♥ s ♣ ♦t♥r ♥s rs♦♥♦ s♥t ♣r♦♠ r♦♥

δΩ[ρ, Uext]

δρ(r)= 0,

♦ q♥t♠♥t

δFint[ρ]

δρ(r)= µ− Uext(r).

♥rí r ♥trí♥s ♠♦t③ sst♠ s ♣ ♦♥strr ♣rtr ♥ó♥ ♣rtó♥ ♥ó♥

QN (V, T )

Fint(V, T ) = −kBT lnQN (V, T ).

st ♥rí s ♣ srr ♦♠♦ s♠ ♥ ♥rí q ♦rrs♣♦♥ ♥ s Fid) ♦♥ ♥

♥rí s ♥tr♦♥s ♥tr s ♣rtís ♦♥ s ③ ♣r ♥str♦ ♠♦♦ st t♠ s ♣

♣♥sr ♦♠♣st ♣♦r ♦s tér♠♥♦s ♥♦ ♦ ♦♥ ♥ sst♠ srs rís ♦♥ ♥tr♦♥s ♣r♠♥t

r♣ss FHS ② ♦tr♦ s♦♦ s ♥tr♦♥s trts ♥ ♦♥♥t♦ ♠♦és ♣rt♠♥t sérs

Fatt s

Fint = Fid + FHS + Fatt.

♦s ♦♠♦é♥♦s

♦s ♦s ♦♠♦é♥♦s s♦♥ q♦s ♦♥ ♥s ♦♥stt② ♥ ♠♣♦ sr ♥♦r♠

♥ó♥ ♣rtó♥ ♥ó♥ ❬❪ ♦♥t♥ ♠t♦♥♥♦ srt♦ ♥ tér♠♥♦s ♥ ♣♦t♥ ♥tró♥

♣rs U(rij) ♦♥ rij = ri − rj ② ♥rí ♥ét s N ♣rtís p2i /2m

H =

N∑

i=1

p2i2m

+

N∑

i=1

N∑

j>1

U(ri,j).

♦ ♥ s♦ ás♦

QN (V, T ) =1

N !h3N

ˆ

..

ˆ

exp

−β

N∑

i=1

p2i2m

+N∑

i=1

N∑

j>1

U(ri,j)

dp1...dpN =

=1

N !h3N

ˆ

..

ˆ

exp

[

−β∑

i

p2i2m

]

dp1..dpN .

Page 26: Adsorción de fluidos sobre sustratos sólidos, estudiada

ˆ

..

ˆ

exp

−βN∑

i=1

N∑

i>j

U(ri,j)

dr1..drN =

=1

N !

[

(

2πm

βh2

)1

2

]3Nˆ

..

ˆ

exp

−βN∑

i=1

N∑

i>j

U(ri,j)

dr1...drN =

=1

N !

[

(

2πm

βh2

)1

2

]3N

ZN (V, T ).

♥ st ①♣rsó♥ β = 1/kBT ② kB s ♦♥st♥t ♦t③♠♥♥

♥ s ♥tr♦♥s ♥tr s ♣rtís stá♥ ♦♥t♥s ♥ ♥♦♠♥ ♥tr ♦♥ró♥

r♣rs♥t ♣♦r

ZN (V, T ) =

ˆ

..

ˆ

exp

−βN∑

i=1

N∑

i>j

U(ri,j)

dr1...drN .

rst♦ st ①♣rsó♥ s ♣ ♥tr ♦♥ ♥rí ♥ét ♥ sst♠ N ♣rtís ♦♥ s ♣♥

s♣rr ♦s t♦s á♥t♦s

♥ó♥ ♣rtó♥ ♥ó♥ s t♦r③ ♥t♦♥s ♥ tér♠♥♦s q ①♣rs♥ ♦♠♣♦rt♠♥t♦ sst♠

② ♦tr♦s tér♠♥♦s q ♥ ♥t s ♥tr♦♥s ♥tr s ♣rtís s r

QN−int(V, T ) = QN−id(V, T )ZN (V, T )

V N= QN−idQN−inter.

♠♥t ①♣rs♠♦s ♥♦ st♦s t♦rs ♣r ♦ srr s ♦rrs♣♦♥♥ts ♥rís rs s♦s

♦♥ ♦s

♥ó♥ ♣rtó♥ ♦rrs♣♦♥♥t s

s ás♦

t♦r s♦♦ s s ♦t♥ ♦♥sr♥♦ q ♦s tér♠♥♦s r♦♥♦s ♦♥ s ♥tr♦♥s Uij s♦♥

é♥t♠♥t ♥♦s st ♠♥r ♥ó♥ ♣rtó♥ s sr ♦♠♦

QN−id(V, T ) =1

N !

[

(

2πm

βh2

)1/2]3N

Z0N (V, T ) =

1

N !Λ3NZ0N (V, T ) =

V N

N !Λ3N,

♦♥ Λ s ♦♥t ♦♥ ❵r♦ ♥ ♣♦r

Λ = h/(2πmkBT )1/2.

♥ qr♦ tr♠♦♥á♠♦ ♥rí r ♥trí♥s ♠♦t③ s s r♦♥ ♦♥ ♥ó♥

♣rtó♥ ♥ó♥ ♠♥t st ♠♥r

FN,id(V, T ) = −kBT[

Nln

(

Λ3

V

)

+NlnN −N

]

= kBTN

[

ln

(

Λ3N

V

)

− 1

]

,

sí ♥rí r ♣♦r ♥ ♦♠♥ s ①♣rs ♦♠♦

Page 27: Adsorción de fluidos sobre sustratos sólidos, estudiada

FN,id(V, T )

V= kBTρ

[

ln(

Λ3ρ)

− 1]

,

♦♥

ρ =N

V,

r♣rs♥t ♥s ♥ s♦ ♥ ♦ ♦♠♦é♥♦

s á♥t♦

♥rí r ♣r ♥ s ♦s♦♥s s ♣ srr ♦♠♦

FN,id(V, T )

V= kBTρ

[

ln(

Λ3ρ)

− 1

Λ3ρg5/2(Λ

3ρ)

]

,

♦♥ ♥íó♥

g5/2(ρΛ3) =

∞∑

s=1

(ρΛ3)s

s5/2.

óts q s ρΛ3 ≪ 1 ♦ s s s ♠♦és stá♥ ♠② st♥s ♥ ♦♠♣ró♥ ♦♥ ♦♥t ♦♥

r♦ q t♥♥ s♦s s r♣r ①♣rsó♥ ás ♥rí r

♥ó♥ ♣rtó♥ s♦ ♦♥ s ♥tr♦♥s

♥ó♥ ♣rtó♥ s♦ ♥ sst♠ N ♣rtís q ♥trtú♥ ♥tr sí ② q qí ♠♦s ♥♦t♦

♣♦r QN,inter s sr ♥ ♥ó♥ ♥tr ♦♥ró♥

QN,inter(V, T ) =ZN (V, T )

V N.

♣rtr st út♠ ①♣rsó♥ s ♣ ♦t♥r ♥rí r ♠♦t③ s♦ s ♥tr♦♥s ♥tr

s ♣rtís q ♦♥stt②♥ ♦

FN,inter(V, T ) = −KBT ln [QN,inter(V, T )] =

= −KBT ln

[

ZN (V, T )

V N

]

.

♦ ♥rí r ♣♦r ♥ ♦♠♥ s sr ♦♠♦

FN,inter(V, T )

V= −KBT

1

Vln

(

ZN (V, T )

V N

)

.

P♦r ♦tr♦ ♦ ♣♦♠♦s ①♣♥r ①♣♦♥♥ q ♦♠♣♦♥ ZN (V, T ) ♦♥sr♥♦ q s ♥tr♦♥s s

s♥ ♠②♦r♠♥t ♣rs ♥tr♥♦ s ♣ rsrr s♥t ♠♥r

exp

−βN∑

i=1

N∑

i>j

U(ri,j)

=∏

pares

exp [−βU(ri,j)] .

Page 28: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦ ♦♥sr♠♦s q ♣♦t♥ ♥tró♥ ♥tr ♦s ♣rtís ♣♥ s♦♦ st♥ q s♣r

s ♣rtís

s s

U(ri,j) = U (‖ri − rj‖) = U(rij)

♣r♦①♠ó♥ ♥ ♥ ♠♦♦ ♦ ♦♥ s ♦♥sr q s ♠♦és q ♦ ♦♠♣♦♥♥ s♦♥ ♣rt♠♥t

sérs ♣♦♠♦s srr t♦♦ ♥ tér♠♥♦s ♥♦♠♥s ♥♦♥s ②r fij ❬❪

exp [−βU(ri,j)] = 1− βU(ri,j) +1

2β2U2(ri,j) + ............ = 1 + fij .

♦ ♥ s♦ ♥ q s ♣rtís sté♥ ♠② rs ♦♠♦ ♦rr ♣r ♦s ♠② ♥s♦s fij s ♣qñ ② ♥t♦♥s

s♥t srr♦♦ ♦♥ s rt♥♥ s♦♠♥t ♦s tér♠♥♦s q ♦rrs♣♦♥♥ r♠s rrs ❬❪

r♣r♦ ♠♥t ♥tr♥♦

exp

−βN∑

i=1

N∑

i>j

U(ri,j)

=∏

pares

exp [−βU(ri,j)] =∏

pares

[1 + fij ] =

=∑

ij

fij +∑

ijk

fijfjkfki + ...........,

ZN (V, T )

V N=

1

V N

ˆ

....

ˆ

ij

fij +∑

ijk

fijfjkfki + ...........

dr1dr2.......drN =

= 1 +N(N − 1)

2

1

V 2

ˆ ˆ

f12dr1dr2 +N(N − 1)(N − 2)

6

1

V 3

ˆ ˆ ˆ

f12f13f23dr1dr2dr3 + ..... .

② ♥ í♠t tr♠♦♥á♠♦

N

V≃ N − 1

V≃ N − 2

V≃ ... ≃ ρ.

s t♥ ♥ ♥t ♠ás q ♦s tér♠♥♦s ♥trs s♦♥ tér♠♥♦s ♦rró♥ ♣♦r ♥ ♣qñ♦s ♥t♦♥s

s ♣ ♣r ♣r♦①♠ó♥ ln(1 + x) ≃ x

♦FN,inter(V, T )

V= −KBT

1

Vln

(

ZN (V, T )

V N

)

=

= −kBT1

Vln

[

1 +1

2ρ2ˆ ˆ

f12dr1dr2 +1

6ρ3ˆ ˆ ˆ

f12f13f23dr1dr2dr3 + ......

]

=

= −kBT1

V

[

1

2ρ2ˆ ˆ

f12dr1dr2 +1

6ρ3ˆ ˆ ˆ

f12f13f23dr1dr2dr3 + ......

]

.

st♦ út♠♦ ♦♥stt② ♥ srr♦♦ ♥ ♣♦t♥s ♥s srr♦♦ r

♥áss s ♦rrs♣♦♥♥ts ♦♥tr♦♥s ♥rí

♥ts srr s ♦♥tr♦♥s ♥rí r ♠♦t③ ♥trí♥s q s r♥ srr♦♦

♥tr ♦♥ró♥ ♠♦s ♥s ♦♥sr♦♥s rs♣t♦ ♣♦t♥ ♥tró♥ s ♣rtís

q ♦♥stt②♥ ♦ Pr ♦ q s s♠r♠♦s q

Page 29: Adsorción de fluidos sobre sustratos sólidos, estudiada

st ♣♦t♥ s ♣ s♦♠♣♦♥r ♦♠♦ s♠ ♥ ♣♦t♥ r♣s♦ Urep q tú st ♥ st♥

r0 ② ♦tr♦ trt♦ Uatt q tú ♣r st♥s ♠②♦rs r0 ❱ r

U =

Urep r < r0

Uatt r ≥ r0.

♦♥sr q sst♠ ♦♥st N srs rs r♦ r0 ♦

Urep ≡ ∞ r < r0.

♥♥♦ ♥ ♥t t♦♦ st♦ s ♣♥ r s ♦♥tr♦♥s r♥ts ór♥s

♦♥tró♥ ♦r♥ rát♦F

(2)N,inter(V, T )

V= −kBT

1

2Vρ2ˆ ˆ

f12dr1dr2 = −kBT1

2ρ24π

ˆ

0

f12(r)r2dr =

−2πkBTρ2

[ˆ r0

0

(−1)r2dr +

ˆ

0

[

exp

(

Uatt(r)

kBT

)

− 1

]

r2dr

]

F(2)N,inter(V, T )

V=

3kBTr

30ρ

2 + 2πρ2ˆ

r0

Uatt(r)r2dr.

♣r♠r tér♠♥♦ r ♥ út♠ ①♣rsó♥ st r♦♥♦ ♦♥ ♥rí r ♥ sst♠ srs

rs ♠♥trs q s♥♦ st ♦ ♥ sst♠ N ♣rtís ♦♥ ♥tr♦♥s t♣♦ trts

♦♥tró♥ ór♥s s♣r♦rs

♥ s ♦♥tr♦♥s ♠②♦r ♦r♥ ♥ ♥s s♦♦ s rt♥ ♣♦t♥ r♣s♦ srs rs sí ♣♦r

♠♣♦ trr ♦r♥ ♦rró♥ s sr ♦♠♦

F(3)N,inter(V, T )

V= −kBT

1

6Vρ3ˆ ˆ ˆ

f12f13f23dr1dr2dr3 = kBT5

16

(

3r30

)2

ρ3.

♦♥

η =π

6r30ρ,

s ró♥ ♦♠♥ ♦♣♦ ♣♦r s srs rs ró♥ ♠♣qt♠♥t♦

♦ ♦rró♥ trr ♦r♥ s ♣ srr ♦♠♦

F(3)N,inter(V, T )

V= kBTρ4η.

♥á♦♠♥t s ♣♦s ①♣rsr s ♦rr♦♥s rt♦ ② q♥t♦ ♦r♥

F(4)N,inter(V, T )

V= kBTρ5η

2,

F(5)N,inter(V, T )

V= kBTρ

3673

600η3.

♥♦s st♦s tér♠♥♦s r♦♥ ♦s ♣♦r ② ♦♦r ❬❪

Page 30: Adsorción de fluidos sobre sustratos sólidos, estudiada

st ♦r♠ ①♣rsó♥ ♥rí r ♥trí♥s q srt ♦♠♦Fint(V, T )

V= kBTρ

[

ln(

Λ3ρ)

− 1]

+ kBTρ

[

4η + 5η2 +3673

600η3 + .....

]

+

+2πρ2ˆ

r0

Uatt(r)r2dr.

s♠ tér♠♥♦s ♦rrs♣♦♥♥ts ♦♥tró♥ srs rs ♣r ♥ ♥ú♠r♦ ♥♥t♦ tér♠♥♦s

♠♥r ♣r♦①♠ ♣♦r r♥♥ ② tr♥ ❬❪ rst♦ s

4η + 5η2 +3673

600η3 + ..... ≃ 4η − 3η2

(1− η)2 = fHS [ρ]

tér♠♥♦ fHS [ρ] s ♥s ①s♦ ♥rí r ♣r ♥ s srs rís

♦ t♥♥♦ ♦♠♦ s sr tér♠♥♦ ♦rrs♣♦♥♥t s ♣♦♠♦s st♥r ♦s st♦♥s

s♦ ás♦

FN,int(V, T )

V= kBTρ

[

ln(

Λ3ρ)

− 1]

+ kBTρfHS [ρ] + 2πρ2ˆ

r0

Uatt(r)r2dr.

s♦ á♥t♦

FN,int(V, T )

V= kBTρ

[

ln(

Λ3ρ)

− 1

Λ3ρg5/2(Λ

3ρ)

]

+ kBTρfHS [ρ] + 2πρ2ˆ

r0

Uatt(r)r2dr.

♥♦♥s ♦rró♥

s ♥♦♥s ♦rró♥ ♥♦ ② ♦s r♣♦s s ♣♥ ♦t♥r ♣rtr ①s♦ ♥rí r Fexc

❬❪ ♥ s♦ ♥ q ♦ ♥trtú ♦♥ ♠♣♦s ①tr♥♦s st tér♠♥♦ ♦♥t♥ ♠ás ♥rí

♥tr♦♥s ♥tr♥s q ♦rrs♣♦♥ ♦s ♠♣♦s ①tr♥♦s sts ♥♦♥s s ♦t♥♥ ♥t♦♥s

♠♥t ró♥ ♥♦♥ ①s♦ ♥rí r s ② ❬❪

c(1)(r) = −δ(

1kBT Fexc[ρ]

)

δρ(r),

c(2)(r, r′) = −δ2(

1kBT Fexc[ρ]

)

δρ(r)δρ(r′).

♦s ♥♦ ♦♠♦é♥♦s ♦rís ♦s ② ♥♦ ♦s

s ♣r♠rs t♦rís srr♦s ♥ ♦♥t①t♦ ♥♦♥ ♥s r♦♥ s ♥♦♠♥s t♦rís

♣r♦①♠ó♥ ♦ ♥s

s s ♥ tr♠♦♥á♠ ♥ ♦ ♥♦r♠ ρ(r) = ρ0 ♣r

F [ρ] = Nf(ρ0),

s♥♦ f(ρ0) ♥rí r ♠♦t③ ♣♦r ♣rtí

Page 31: Adsorción de fluidos sobre sustratos sólidos, estudiada

st ♠♥r ♦r♠ó♥ ♦♥sst s♠♣♠♥t ♥ ♥ ♥r③ó♥ ♣r s♦ ♥♦

♥♦r♠ ♥♥♦ ♥ ♥t ①♣rsó♥ ♣r ♥ú♠r♦ ♣rtís ❬ ❪

FLDA =

ˆ

ρ(r)f(ρr)dr.

st ♣r♦①♠ó♥ s ♣ str s ♦♥sr♠♦s ♥ ♦ q ♣rs♥t r♦♥s s♣s ♠② ss

♥s ♥ ♠♥r s ♦♠♦ trtr ♦ ♥♦ ♦♠♦é♥♦ ♦♠♦ tr♦③♦s ♥♣♥♥ts ♦

♦♠♦é♥♦

③ ♥ sst♠s ás♦s s ♠② ♠t ♥♦ sí ♥ sst♠s á♥t♦s ♦♥ ♠♥♦r ♥ s

♦rr♦♥s ♦♥rt ♥ ♥ ♣r♦①♠ó♥ r③♦♥♠♥t ♥ ♥ ♠s st♦♥s

♦r♠ó♥ s ①t ♣r s ♦ s ú♥♦ sst♠ q s sr ♠♥t ♦♥

st ♣r♦①♠ó♥ Pr ♦rr♦♦rr st♦ st ♦♥ ♥tr♦r ♥ rst♦ s

c(2)(r) ≈ δ(r).

s r st ♣r♦①♠ó♥ ♥♦ t♥ ♥ ♥t s ♥tr♦♥s ♥ ♥ ♥t♦r♥♦ ♣♥t♦ s♣r♥♦ ♣♦r ♦ t♥t♦

♦s t♦s s ♦rr♦♥s

♠♦♦ s ♣ ♠♦rr ♦♥ ♥ srr♦♦ ♥ r♥ts ♥s ♦r♠s♠♦ ♥♦♠♥♦

sr♥♦ ♥ tér♠♥♦s ♥rí r ♣♦r ♥ ♦♠♥

f(ρ(r)) = ρ(r)ψ(ρ(r)),

② tr♥♥♦ st srr♦♦ ♥ s♥♦ tér♠♥♦ ①♣♥só♥ ❬❪ st ♥t♦♥s

FSGA[ρ] =

ˆ

dr[

f(ρ(r)) + f2(ρ(r))(∇ρ(r))2 + .........]

,

♦♥ f(ρ(r)) ♦rrs♣♦♥ ♥rí r sst♠ ♥♦r♠ ② tr♠♥♦ f2(ρ(r)) ② ♦s ss♦s tér♠♥♦s

♥ s♦ ♦♥t♥r ①♣♥só♥ t♥ ♥ ♥t s r♦♥s s♣s ♥s

Pr ♦t♥r ①♣rsó♥ f2(ρ(r)) t♥♠♦s q ♠♣♦♥r ♥ ♦♥ó♥ ♦♥ ♥str♦ ♥♦♥ ♦♠♦

♣♦r ♠♣♦ q r♣r♦③ rs♣st ♥ s♣r ♥♦ ♣rtr♠♦s sst♠ ♣r♦①♠ó♥

s á ♥s♦ ♥ st♦♥s ♦♥ ♥s rí rt♠♥t ♣r♦ ♦♥ strt rstró♥ q ♦

♠♦ ♣r♦rs ♦ r♦ ♥ st♥ ♠② r♥ ♥ ♦♠♣ró♥ r♥♦ ró♥ ♣♦t♥

♥tr♠♦r ♥ ♣rát st rstró♥ ♠t ♠♦ s♦ s ♥ s s♦ ♦♥ é①t♦ ♣r srr

s rtrísts ♥trs íq♦♣♦r r ♥ ♣♥t♦ rít♦ ♣r♦♠s ♦♥ ♥trss íq♦íq♦

♥ ♠③s ♣r♦♠s ♠♦♦ t

s t♦rís ♥♦ ♦s ♥♦♥ ♥s r♥ s ♦s t♥♥ ♥ ♥t s

♦rr♦♥s ♠♦rs ♦rt♦ r♥♦ ② ♥t♦♥s ♣r♦♥ ♥ rr♠♥t ♠♣rs♥ ♣r str sst♠s

♥♦♠♦é♥♦s ♦♥ rts r♦♥s ♥ ♣r ♥s st♦s ♣r♦♠s ♣r♥ ♣♦r ♠♣♦ ♥

st♦ s♦ró♥ ♦s s♠♣s s♦r sstrt♦s só♦s ♦s ♠ét♦♦s r♦s sr♥

♣r♦♣♠♥t ♥ó♠♥♦s ts ♦♠♦ tr♥s♦♥s s ♦♥♥só♥ ♣r ♥ó♠♥♦s ♠♦♦ t

♦s ♦r♠s♠♦s ♥♦ ♦s ♥ ♥t t♠é♥ s ♦s♦♥s q ♣r♥ ♥ ♣r ♥s ♥♦

♦ s s♦r s♦r ♥ ♣r rst♦ ♥♦ t♥t♦ ♥ s♠♦♥s ♦♥tr♦ ♦♠♦ ♥á♠

♦r q st s♥t ♥ ♦s á♦s ♦s ♥t ♠♥t ♦s ♦r♠s♠♦s ♦s

♥ s♦ s st♥ ♦s ♦r♠♦♥s ♥ s r③♦♥ ♥s ② ♥rs♦♥

q ♠♦s ♥♦♠♥♦ s♠♦♦t ♥st② ♣♣r♦①♠t♦♥ t③ ♥ ♠♣♦ ♥ss ♣r♦♠♦ ♦♥

Page 32: Adsorción de fluidos sobre sustratos sólidos, estudiada

rt♦s t♦rs ♣s♦ q ♦♥stt②♥ ♣rá♠tr♦s rs t♦rí

♦tr♦ ♦r♠s♠♦ ♥♦♠♥♦ ♦rí s s ♥♠♥ts srr♦♦ ♣♦r ♦s♥ r

② ♦s♥r ♥♦ ♦♥t♥ ♣rá♠tr♦s rs

trs ♦♥sr♦♥s rrs ♦s ♦r♠s♠♦s ② s♦♥ s s♥ts ❬❪

♥♦ s st♥ tr♥s♦♥s ♠♦♦ tt♥ s t♦rís ♦s r♥ s♦rst♠♥

á♥♦ ♦♥tt♦ ♥tr ♣r ② ♦ ♥ ♥ stó♥ ♠♦♦ ♣r

♥ ♦♥trst ♦♥ s ♣r♦♥s st ♦r♠s♠♦ sr ♠♥t ♦①st♥ íq♦s ♥

sst♠s ♦s ♠♥s♦♥s ♦♥♥♦s ♥ ♣♦r♦s ♠② str♦s t♠♣rtrs ♥r♦rs rít

P♦r ♦tr♦ ♦ ♥♦ s st tr♥só♥ ♣r ♦s ♦♥♥♦s ♥tr ♣rs tr♥só♥ ♦♥ s

♣s ♥ íq♦ ♥s♦ ♥ s ♦ ♣rs♦♥s ♠②♦rs stró♥ s í♥s ♦①st♥ ♣r

s ♠♥t ♥♦ r♥ ♠s♦ s ♦t♥s ♠♥t ♦ st♦ sr q s

♦rr♦♥s ♦rt♦ ♥ ♥♦ s♦♥ ♥ st s♦ ♠♣♦rt♥ts

Pr ♥ stó♥ ♠♦♦ ♣r ♣rsó♥ ♦♥♥só♥ ♦t♥ ♠♥t st ♥ ♥ r♦

♦♥ s ♣r♦♥s q ② ♣ ♦ ♥ ♣r s♦ró♥ ♥ ♣♦r♦s str♦s ♦♥ r♦s s♣r♦rs

♦s ♥♦ á♠tr♦s ♠♦rs ♦ ♣rs st♥s ♥ ♥♦s ♣♦♦s á♠tr♦s ♠♦rs

♥ st tr♦ t③♠♦s ♥♠♥t♠♥t ♠♦♦ ♥q ♣rs♥t♠♦s ♥ r sr♣ó♥ ♠♦s

♦r♠s♠♦s

♦r♠s♠♦ r③♦♥♥s♥rs♦♥

trt♠♥t♦ sst♠s ♥♦ ♦♠♦é♥♦s ♦♥ ♦♥ ♦s ♥tr♦rs ♠ét♦♦s ó♥ f(ρr) ❬ ❪

♥ st♦♥s ♦♥ ρ t♦♠ ♦rs ♠② t♦s ♥ ts r♥st♥s ♦♠♣♦rt♠♥t♦ ♥ sst♠ ♥♦r♠

srá ♣rs♠♠♥t ♠② r♥t q ♣rs♥tr sst♠ r ❯♥ ♠♣♦ st♦ út♠♦ ♦ ♦♥stt②

s♦ ♥ ♦ srs rs ♥ st s♦ ♥♦ ♣♦rí♠♦s trtr st♦♥s ♥ ♦♥ ♥s ♦ s♣r

í♠t ♠♣qt♠♥t♦ ♠á①♠♦

♦s ♥♦♥s ♣s trtr ♦s sst♠s s srr♦r♦♥ ♣r♥♣♠♥t ♥ é ♦s s

❬ ❪ t③r♦♥ ♣r ♦ té♥s ♦♠♦ srr♦♦ ①s♦ ♥rí r Fexc[ρ] r♦r

♥s ♦ ♥♦r♠ srr♦♦ ♣rtrt♦ r♦r ♥ ♦ rr♥ ♥ ♦♥♦♦ t

♥♦ s s ♦r♦♠ ❬❪ r③♦♥ ♣r♦♣s♦ ♥tr♦r ♦rr♦♥s ♥♦ ♦s ♥♦♥ ♠♥t

s♦ ♥ stró♥ ♥s ♣s ♦rs r♥ ρ(r) q s ♥ ♥ó♥ ♥♦ ♦ ρ(r) ♥ ♣♥t♦

r sst♠ ♦ ♣ ♠♥r ρ(r) ♦♠♦ s r ♥ s♣ ♥s ♣r♦♠ ♥ ♥ ♦♠♥

r♦♥♦ ♦♥ ♥ s ♥tr♦♥s ♦s ♣♦s ♥ ♥s ♦ s♦♥ s③♦s ♥ ρ(r) ② ♥♦ s ♦rr

rs♦ r ♥rí r ♥ ♣♥t♦s ♦♥ ♠♣qt♠♥t♦ ♥③ ♦rs r♥ts s♥t♦ ís♦

♥ st ♣r♦①♠ó♥ ♥rí r ①s♦ ♦♥ s srs rs s sr ♦♠♦

Fexc−HS [ρ] =

ˆ

drρ(r)fHS [ρ(r)],

♦♥ fHS s ♥s ①s♦ ♥rí r ♣♦r ♣rtí q ♦rrs♣♦♥ sst♠ ♥♦r♠ Pr

sst♠ srs rs á♠tr♦ σ ♣♦♠♦s sr ó♥ st♦ r♥♠tr♥ ❬❪

Pr ♣♦r ♦♣rr ♦♥ s ♥sr ♥ sr♣ó♥ ρ(r) ❯♥ ♣♦s s s ❬ ❪

ρ(r) =

ˆ

d3r′ρ(r′)w (|r− r′|) ,

♦♥ w(r) s ♥ ♥ó♥ ♣s♦

Page 33: Adsorción de fluidos sobre sustratos sólidos, estudiada

Pr tr♠♥r s ♥♦♥s ♣s♦ s ♠♣♦♥♥ ♦s ♦♥♦♥s

♥ó♥ ♣s♦ str ♥♦r♠③

♥♦♥ r♣rr ♦r♠ r③♦♥ í♠t ♦rrs♣♦♥♥t ♥ ♦ ♥♦r♠

s r ♥ ♠♥r ♦ ♣♦s ♥ó♥ ♦rró♥ rt q rst r♥ó♥ ♥♦♥

❬ ❪ str ♥ ♥ r♦ ♦♥ ♣r♦①♠ó♥ Prs❨ ❬❪ q ♦♥stt② ♥ ♣r♦①♠ó♥

rr♥t ♥ t♦rí íq♦s ♦♠♦é♥♦s

ó♥ ♠ás s♥ ♣♦s ♣r w(r) s ♥ó♥ só♥

w(r) =

34πσ

−3 r < σ

0 r > σ.

st ó♥ r♣r♦ ♥ rtríst ♠♣♦rt♥t ♥ó♥ ♦rró♥ rt ♦♠♦ s♦♥t♥

♥ r = σ ♣r♦ s♦rst♠ ♥ ♠s♠ ♥ sí s ♦t♥ ♥ ♥♦♥ q ♣r♦♣♦r♦♥ rst♦s

tt♠♥t ♥♦s ♥ ♣r♦♠s ♦♥ s st♥ ♥trss ♥tr ♦s srs rs ② ♥ ♣r r

♦ tr♥s♦♥s ♦só♦ ❬ ❪

r③♦♥ ❬❪ ♣r♦♣s♦ ♥ ♥ó♥ ♣s♦ ♦♥ ♥ ♣♥♥ ♥ ♥s ♣r ♠♦rr sr♣ó♥

♥ó♥ ♦rró♥ rt c(r) q s s♣r♥ ♥♦♥ ♦♥ st ♥ ♥ó♥ ♥s ♣s

rst

ρ(r) =

ˆ

d3r′ρ(r′)w (|r− r′| ; ρ(r)) .

st ♥ ♥ó♥ ♥tr♦ r r ♥♦♥ ♥♦s tér♠♥♦s ♥ c(r) ② ♣♦r t♥t♦ s ♣ ♦t♥r

♥ ♣s♦ q r♣r♦③ ♠♦r s ♦rr♦♥s ♦♠♥

s♠ q w(r, ρ) s ♣ srr♦r ♥ ♥ sr ♣♦t♥s ♥s

w(r; ρ) = w0(r) + w1(r)ρ+ w2(r)ρ2 + ....... .

♦♥ó♥ ♥♦r♠③ó♥ s♦r w(r, ρ) ♠♣ ♥sr♠♥t

ˆ

drwi(r) =

1 i = 0

0 i = 1, 2, ....

❯s♥♦ srr♦♦ ♥ ♣♦t♥s ♥s w(r) ♦ ♣♦r ② r♥♥♦ ♥♦♥ sú♥

s ♦t♥ ♥ srr♦♦ ♥ ♣♦t♥s ♥s ♥ó♥ ♦rró♥ rt P♦♠♦s

♦♠♣rr ♦ srr♦♦ ♦♥ q s ♦t♥ ♥ ①♣♥só♥ r c(r) ② s ♦r♠ rr

♥♦r♠ó♥ ♥sr ♣r r s ♥♦♥s ♣s♦ wi

st ♠♥r w0(r) s ♥♦ ♥ó♥ só♥ ♣♦r ② ♣r w1(r) s ♦t♥ ♥ ó♥

♥tr q rs♦rs ♥♠ér♠♥t

Pr rst♦ ♦♥ts wi, i ≥ 2 s ♥st♥ t♠é♥ ♦s tér♠♥♦s srr♦♦ fHS(ρ)

óts q ♥ st ♣♥t♦ ② ♥ ♣qñ ♥♦♥sst♥ ♣♦r ♥ ♦ s t③ ó♥ st♦ r♥♠

tr♥ ② ♣♦r ♦tr♦ s ♣rt♥ r♣rr s ♦rr♦♥s ♣r♦①♠ó♥ Prs❨ ♥ ♠r♦ s

♦rr♦♥s ② ♥rí ①s♦ ♣♦r ♣rtí stá♥ r♦♥s ♣♦r ♠♦ ♥tr ♦♠♥ c(r)

♦ st ♥♦♥sst♥ ♥♦ s ♣♦s ♥tó♥ tér♠♥♦ tér♠♥♦ wi ♣r i ≥ 2 ❯♥ tr♥t

♣r ♦rr ♦♥sst♥ s tr♥r srr♦♦ ♥ i = 2 r③♥♦ ♥ st ♥ó♥

Page 34: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣s♦ w2(r) ♣r q s ♦t♥ ♥ ♥ sr♣ó♥ c(r) ♥ t♦♦ r♥♦ ♥ss s s tr♥

srr♦♦ ♥ i = 1 ú♥♠♥t s r♣r♦ ♦♠♣♦rt♠♥t♦ c(r) ♥ ♥ r♥♦ ♥ss ♣qñ♦ ♥

sr ♥rs♦♥♥♦ ♥ srr♦♦ ♠ét♦♦ tr♥sr♠♦s ♦♥t♥ó♥ ♦s rst♦s q s ♦t♥♥ ♣r

s ♥♦♥s ♣s♦

w0(r) =

34πσ3 r < σ

0 r > σ,

w1(r) =

0,475− 0,648(

)

+ 0,113(

)2r < σ

0,288(

σr

)

− 0,924 + 0,764(

)

− 0,187(

)2σ < r < 2σ

0 r > 2σ

,

w2(r) =

5πσ3

144 (6− 12)(

)

+ 0,113(

)2r < σ

0,288(

σr

)

− 0,924 + 0,764(

)

− 0,187(

)2σ < r < 2σ

0 r > 2σ

.

♦ ♦♥ ρ(r) sí ♦♥str s r♣r c(r) Prs❨ ♥ ♥ r♥♦ ♥ss ♠② ♠♣♦

♥♦♥ q s ♦t♥ ♥ ♣r♦①♠ó♥ ♦♥str♦ st ♠♥r s ♣③ srr stst♦r♠♥t

st♦♥s s♣♠♥t ♠② ♥♦♠♦é♥s ♦♠♦ s q ♣r♥ ♥ ♣r♦♠s só♦s srs rs ♦

♥trss ♥tr srs rs ② ♣rs rs ❬❪

①st♥ ♦trs t♦rís ♦♥ s tr ♦♥ ♥ss ♣r♦♠s ♣♦♠♦s tr rs♣t♦ t♦rí rt♥ ②

sr♦t ❬❪ ♥ st ♦r♠ó♥ ♥ r r ♥ ①♣♥só♥ ♥ ♥s ♣r r s ♥♦♥s ♣s♦

sts s ♥ ♥♠ér♠♥t ♣r q ♥♦♥ r♣r ♦rró♥ Prs❨ ♥ t♦♦ r♥♦

♥ss ♥ st út♠♦ s♦ ♦st♦ ♦♠♣t♦♥ s ♠♦ ♠②♦r

♠é♥ ♠r♥ ♥ ♠♥ó♥ s t♦rís ss ♥ ♥ ♣s♦ q s ♥♣♥♥t ♣♦só♥ ♣♦r ♠♣♦

♦ ❲ ♥t♦♥ ② sr♦t ❬❪ ♦ ts♦ ② s ❬❪

♠♣♠♥tó♥ sts ♣r♦①♠♦♥s s ♠ás s♥ ♦st ♥ sr♣ó♥ ♠ás r♠♥tr sst♠

♦rí s s ♥♠♥ts

♥ út♠ é s♦ ❳❳ ♦s♥ ♣r♦♣s♦ ♦ q ♥♦♠♥♦ ♦rí s s ♥♠♥ts

② ♥ s ♦t♦ ♥ ♥♦ t♣♦ ♥♦♥s ❬ ❪ st♦s ♥♦♥s s♦♥ s♣í♦s ♣r

r♣♦s r♦s s♦s srs ♥r♦s t ② t♥♥ ♥ strtr ♦♠♣t♠♥t r♥t ♦s r♦s

♣r♦①♠ó♥ s ♥ ♦♠trí ♠♦r ♥ r ♦♠♥ ①♦ ♥tr ♦s ♣rtís st

t♦rí srr♦ ♥ ♣r♥♣♦ ♣r trtr ♣r♦♠s ♠③s ♦s

♥ s ♦r♠ó♥ ♦r♥ ♥rí ①s♦ ♣r ♥ ♠③ srs rs s ♣ srr ♦♠♦

Fexc−HS [ρi(r)]

kBT=

ˆ

dr′fHS [nα(r′)] ,

♦♥ ρi s ♥s s♣ i ② fHS s sr ♦♠♦ ♥ó♥ s nα q ♦♥stt②♥ ♣r♦♠♦s s

♠s ♥♠♥ts s ♣rtís r♦ só♥ ♦♠♥ t

nα(r′) =

i

ˆ

dr′ρi(r′)ω

(α)i r− r

Page 35: Adsorción de fluidos sobre sustratos sólidos, estudiada

s ♥♦♥s ♣s♦ ω(α)i stá♥ r♦♥s ♦♥ ♦♠trí s ♣rtís q ♦♥stt②♥ ♦ át♦♠♦s ♦

♠♦és ② s♦♥ ♣♥t♦ ♥ t♦rí ♦r α st ♦ ♦♥ ♠♥s♦♥ s♣♦ q

♥♦♠♥r♠♦s D 0 < α < D st♦s ♣s♦s s ♦t♥♥ ♥♦ ♦ ♥ s♦♠♣♦só♥ ♥ó♥

②r ❬❪ ♥ tér♠♥♦s s♠s ♦♥♦♦♥s ♥♦♥s ♣s♦ ♥ s♦ srs rs ①st ♥ ú♥

s♦♠♣♦só♥ st t♣♦ q ♥♦r ♥♦♥s ω(α)i ♥ s♦ ♣rtr ♥ q ♠♥só♥ s♣♦

s ♦s ♥♦♥s ♣s♦ s♦♥ srs ② r♣rs♥t♥ ♦♠♥ ② s♣r sr ② ♥ trr s ♥

t♦r s♣r s rst♥ts s♦♥ ♣r♦♣♦r♦♥s sts trs ♥♦ ♥ ♥áss ♠♥s♦♥ ② t♥♥♦

♥ ♥t s r♦♥s q s ♦t♥♥ t♦rí ♣rtí s ❬ ❪ ♥ ♣rtr q rr ♥ ♥

♦ ♥♦r♠ ♥ sér r♦ R → ∞ s♣♦♥ ♥ tr♦ q PV ♦♥ P s ♣rsó♥

② V ♦♠♥ s ♦t♥ á♠♥t ♥ ①♣rsó♥ ♣r ♥rí ①s♦ ♥♦♥ sí

♦♥str♦ ♣r ♠♥t ♦s rst♦s q ♣r♥ ♥ ♣r♦♠s ♦♥ ♠♣♦s ♥s t♠♥t

♥♦ ♥♦r♠s ♣r♦♠s ♦♥ s st s♦ró♥ srs rs s♦r ♥ ♣r r

trs ♥ts ♠♣♦rt♥ts stá♥ r♦♥s ♦♥ ♦ q s ♥♦♥s ♦rró♥ s ♦t♥♥

rá♣♠♥t ♣rtr ♦s ♣s♦s ♣r ♥ ♦ ♥♦r♠ ♠♦♥♦♦♠♣♦♥♥t ♥♦♥ ♦s♥

r♣r ó♥ st♦ ② ♦rró♥ Prs❨ ♥óts r♥ ♦♥ s t♦rís ♦♥strs

①♣ít♠♥t ♣r q s ♦t♥ st ♦♠♣♦rt♠♥t♦

♣sr sts ♥ts ♥♦♥ ♣rs♥t rt♦s ♣r♦♠s ♥ st♦ só♦ srs rs ♣s

♣r q s s♠♣r ♥st r♥t íq♦ ♥ ♥ s só ♣rtí stá ♦♥♥ ♥ ♥

s ♦♥ ♥ ♣r♦♠♦ ♦♣ó♥ rí ♥tr ② ♥♦ s st í♠t ♦♥ ♥♦♥

♦s♥ s ♦t♥ ♥ r♥ ♥ ♥rí r q ♥ s♥ s ♦r♥ ♦ t♦rí st

♥tr♣rtó♥ ♣r♦♣ó srr♦♦ ♥♦♥s s♦s ♥ s ♦tr♦ ♣♥t♦ st ♦♥♦♦ ♦♠♦

ró♥ ♠♥s♦♥ ♠♥s♦♥ r♦ss♦r ♥ st s♦ s ♠♣♦♥ ♥♦♥ q r♣r í♠t ①t♦

♥ s s ❬ ❪ rst♦ s♦♥ ♥♦♥s q ♣r♦s ♥ ♦trs ♠♥s♦♥s r♣r♥

s♦ó♥ ①t Prs❨ ♥ ❬❪ ② ♥ s♦ó♥ q rr♦ t♦rí ♣rtí s

♥ trs ♠♥s♦♥s s♥ ♠r♦ s ♦t♥ ♥ ó♥ st♦ q ♥♦ ♣r♦ rst♦s ♣ts Pr

rs♦r st ♥♦♥♥♥t r③♦♥ ❬❪ ♣r♦♣s♦ ♥ ♠♦ó♥ ♥ ♥♦ ♦s tér♠♥♦s ♥♦♥ ♦

s♥ ♥♦r♣♦r♥♦ ♥ ♣s♦ t♥s♦r ♦ ♥♦♥ ♥♦ t♥ r♥s ♥ í♠t r♣r rst♦

①t♦ ♥ ② r♣r♦ ♥ó♥ ♦rró♥ ② ó♥ st♦ Prs❨ ♣r ♦ ♥♦r

♠ s♣t♦ s só sr ♠♥t strtr ♥q ♥ ♣ró♥ ♥ss

♦①st♥ ♦ q ♦ s sr ♦♥ ó♥ st♦ Prs❨ ♣♥ ♠♦rr

s ♣r♦♥s ♣r ♦①st♥ s s ♠♦ ♥♦♥ ♦r♠ q s ♦t♥ ó♥ st♦

r♥♥tr♥ ❬❪ ♣r♦ ♥t♦♥s ♠♣♦r sr♣ó♥ só♦

s♣t♦s ♦r♠s t♦rí

♦♠♦ s ①♣rs♦ ♥ts ♦r♠ó♥ stá ♥s♣r ①st♥ ♥♦ís ♥tr s t♦rís ♣rtí

s ② Prs❨ ♣r srs rís t♦rí ♣rtí s ♥ st ♦♥t①t♦ s♦♦ ♣♦rt

tr♠♦♥á♠ ♣r♦♠

ró♥ t♦rí ❬ ❪ ♣rt ♥ ♦sró♥ ♥r ①♣rsó♥ Prs❨

r♦♥ ♦♥ ♥ó♥ ♦rró♥ rt ♦s ♣rtís ♦rrs♣♦♥♥t ♥ ♦ srs rs

P♦♠♦s ①♣rsr ♥ó♥ ♦rró♥ ♦♠♦

c(x) =

−λ1 − 6ηλ2x− 12ηλ1x

3 x < 1

0 x > 1,

Page 36: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♦♠trí ♦s srs rís q s ♥trs♥ t♦rí s s ♥ ♦♥t♥♦ ♦♠étr♦ ♥ó♥ ♦rró♥ ♦rrs♣♦♥♥t ♥ st s♦ ♦s srs rís q s ♥trs♥ ♥ r R ♦rrs♣♦♥ r♦ s srs ② r s st♥ ♥tr ss ♥tr♦s st♦r ∆S ♠r ár tr♥srs ♥trsó♥

♦♥ x = r/d, η s ró♥ ♠♣qt♠♥t♦ ②

λ1 =(1 + 2η)

2

(1− η)4 ,

λ2 =− (2 + η)

2

4 (1− η)4 .

♣ sr rsrt ♥ ♥ó♥ rts ♥ts q rtr③♥ ♦♠trí ♦s srs q

s ♥trs♥ sts srs t♥♥ r♦ R ② stá♥ s♣rs ♥ st♥ r ♦♥

r < 2R

♥ s ♣ ♦srr ♥ sq♠ stó♥

s ♥ts ♠♥♦♥s s♦♥ ♦♠♥ ♥trsó♥ V só♥ tr♥srs ♥trsó♥∆S(r)

② r♦ ♠s♠ ∆R(r) = 2R−R ♦♥ R = R+ r/4

①♣rs ♥ ♥ó♥ sts ♥ts ♣r♠♥t ♦♠étrs ♥ó♥ ♦rró♥ s sr ♦♠♦

−c(r) = χ(3)∆V (r) + χ(2)∆S(r) + χ(1)∆R(r) + χ(0)Θ(|r| − 2R),

♦♥

χ(0) =1

1− ξ3,

χ(1) =ξ2

(1− ξ3)2 ,

Page 37: Adsorción de fluidos sobre sustratos sólidos, estudiada

χ(2) =ξ1

(1− ξ3)2 +

ξ22

4π (1− ξ3)3 ,

χ(3) =ξ0

(1− ξ3)2 +

2ξ1ξ2

(1− ξ3)3 +

ξ32

4π (1− ξ3)4 ,

♦♥

ξα = ρR(α).

qí s R(α) ♦♥stt②♥ s ♠♥ts ♦♠étrs ♥♠♥ts ♣r♦♠ ♥trsó♥

R(0) = 1,

R(1) = R,

R(2) = 4πR2,

R(3) =4

3πR3,

♥ s♦ ♥ ♦ ♦♠♦é♥♦ sts ♥ts ♦♥♥ ♦♥ ♦s t♦rs ♣s♦ q ♣r♥ ♥ t♦rí

♣rtí s ❬❪

s ♥ts r♦♥s ♦r♣ ♦♠♥ ár ② r♦ ♣♥ sr ①♣rss ♥ tér♠♥♦s ♦♥♦♦♥s

♥♦♥s ♦♥ s q s♣és s ♥ ♣sr s ♥ss s♦s ♦♥ ♦♠trí s srs ♥♠♦s

♥t♦♥s s s♥ts ♥♦♥s ♣s♦ srs q s♦♦ ♥♦r♥ ♥ts ♦♠étrs ♥♠♥ts

ω(3)(r) = Θ(|r| −R),

ω(2)(r) = δ(|r| −R),

ω(1)(r) =ω(2)(r)

4πR,

ω(0)(r) =ω(2)(r)

4πR2,

Pr ♦tr♦ ♦ t♥♠♦s s s♥ts ♥♦♥s ♣s♦ t♦rs

ω(V 2)(r) = −∇ω(3)(r) =r

Rδ(|r| −R),

ω(V 1)(r) =ω(V 2)(r)

4πR,

♥t♠♥t r♦♥ ♣r♦♣sts ♦trs ♥ts t♥s♦rs ♣r ♦♥sr ♣r♦①♠♦♥s ♠ás ♣rss sts

♥ts ♥♦ srá♥ t♥s ♥ ♥t ♥ ♣rs♥t tr♦

Page 38: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥t ♠♣♦ sts ♥♦♥s ♣s♦ ♣♦♠♦s ①♣rsr ♦♠♥ ② ár ♥trsó♥ ♦♠♦

∆V (r) = ω(3) ⊗ ω(3) =

ˆ

Θ(|r′| −R)Θ(|r− r′| −R)dr′ =

=2

3π(

2R3 − 3R2r + r3)

Θ(|r′| − 2R),

∆S(r) = 2ω(3) ⊗ ω(2) = 2

ˆ

Θ(|r′| −R)δ(|r− r′| −R)dr′ =

= 4πR2Θ(|r′| − 2R)(

1− r

2R

)

,

∆R(r) =∆S(r)

8πR+

1

2RΘ(|r| − 2R) =

(

R− r

4

)

Θ(|r| − 2R),

P♦r ♦tr♦ ♦ ①s♦ ♥rí r ♦ srs rís s ♣ ①♣rsr ♦♠♦ s ♥ ♥

♦♥ nα(r) ♦rrs♣♦♥í ♥s ♣r♦♠ q ♥ s♦ ♥ ♦ ♦♥ ♥s ♥♦r♠

♦♥ ♦♥ s rs ♥ t♦rí ♣rtí s

n0 = ρ,

n1 = Rρ,

n2 = 4πR2ρ,

n3 =4

3πR3ρ,

♥s ♣r♦♠ ♣r ♥ ú♥ s♣ ♣rtís s ①♣rs ♦♠♦

nα(r) =

ˆ

dr′ρr′ω(α)r− r′.

♥ó♥ ♦rró♥ rt ♥ ♣rtí s ♣ r trés ró♥ ♥♦♥ ♥rí

r

c(1)(r) = − 1

kBT

δFHS [ρ]

δρ(r)=

ˆ

dr′∑

α

∂fHS

∂nαω(α)r− r

′,

② ♥s ♥rí r s ♣ r♦♥r ♦♥ s ♥ss ♣r♦♠s ♠♥t ①♣rsó♥

fHS = n0ln(1− n3) +n1n2 − nV1 nV2

1− n3+

1/3n32 − n2(nV2 nV2)

8π(1− n3)2.

qí nV1 ② nV2 s♦♥ t♦rs

st ♠♥r ♥ í♠t ♦s ♦♥ ♥s ♥♦r♠ s r♥♥tr ①♣rsó♥ Prs❨ ♣r

♥rí r ♦rrs♣♦♥♥t ♦ srs rs

fHS [ρ] = −ln(1− η) +1

2

6η − 3η2

(1− η)2.

Page 39: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 40: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♣t♠③ó♥ ♥♦♥ ♣r♦♣st♦ ♥

st ss

♥ st ♣ít♦ ♣rs♥t♠♦s ♥ ♥ ♣r♦♣st ♣r ♦♣t♠③r ♥♦♥ ♥s ♥ ♦ s♦r♦

♥♦♥ sí ♦♣t♠③♦ ♦ trs q ♣r♠tó r♣r♦r ♦♥ ♣rsó♥ t♥só♥ s♣r

♣r♦♣s r♦♥s ♦♥ ♠♦♦ s♣rs t♠♣rtrs ♠♦♦ ② ♣r♠♦♦ ② ♦trs ♣r♦♣s

s ♦♥ s♦ró♥ ♥ ♣rs ② r♥rs strs ts ♦♠♦ ♥ó♠♥♦s r♣tr s♠trí ♥ ♦s ♣rs

♥s q ♣♥ ♣rr ♥♦ ♦ s s♦r ♥ ♥ r♥r ♣♥ ♣rs é♥ts

♥tr♦ó♥

❯♥ t♦rí ♠♦r ♦s sr ♣③ ♣rr ♠♥t s ♣r♦♣s qr♦ t ♦♠♦

♦①st♥ s ss íq♦♣♦r ♥♦ ♦ ♥♦ s ♥♥tr s♦♠t♦ ♥♥ú♥ ♣♦t♥ ①tr♥♦

♥ ♦s á♦s t♦s ♣r ♦s ♦♥♦r♠♦s ♣♦r ss ♥♦s ♥tr♦ sq♠ t♥t♦ ♥á♠

♦r ♦♠♦ ♦s ♠ét♦♦s s♠ó♥ ♦♥t r♦ ♦ r♥ ♥ó♥♦ ♦♥t r♦ ②

s s♠ q ♥tró♥ ♥tr ♠♦és ♣♦rs ♦♠♦ s q ♦♥♦r♠♥ st s sst♥s

s ♣ r♣rs♥tr ♠♥t ♥ ♣♦t♥ Φ t♣♦ ♥♥r♦♥s ♦ ú♥ ♦tr♦ ♣♦t♥ q

r ♥s ss rtrísts s♥s ❬❪ ①♣rsó♥ ♣r st ♣♦t♥ s

Φ(r) = ΦLJ(r) = 4εff

[

(σffr

)12

−(σffr

)6]

,

♦♥ εff s ♥t♥s ♣♦t♥ ♦♥ q ♥trtú♥ s ♣rtís át♦♠♦s ♦ ♠♦és σff s s

á♠tr♦ ② r s st♥ ♥tr s

♦s ♣rá♠tr♦s εff ② σff ♣♥♥ t♣♦ sst♥ r r♦ ♥ st st♦ ♥♦s♦tr♦s tr♠♦s

♦♥ ♦s q s ♥♥tr♥ ♣rs♦♥s q ♥♦ s♦♥ ①tr♠s ♥ st s♦ ♠②♦r ♦♥tró♥ ♥tró♥

♥tr♠♦r ♦ ♥trtó♠ ♣r♦♥ ♠♦és ♦ át♦♠♦s q ♥trtú♥ ♣rs ♣♦r ♦ ♦s

r s ♥tr♦♥s ♦s r♣♦s s♦♥ s ♦♠♥♥ts ❬❪

♥t s♠♦♥s ♥♠érs ♣rtr ♦ s ♦r r♣r♦r ♦♥ ♥ ♣rsó♥ r

♦①st♥ ①♣r♠♥t ♥♦ s ♠♣ ♥ st ♣♦t♥ ♦rs t♣♦s ♣r εff ② σff

Page 41: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 4025

30

35

40

45

50

ρ [nm−3]

T [K

]

Tc

Ne

r rs ♦①st♥ ss íq♦♣♦r ♣r ♦s ír♦s ♦rrs♣♦♥♥ ♦rs ①♣r♠♥ts ② r ♥r♦r ♦s ♦rs ♦s ♥♦ s t③ ♦♠♦ ♣♦t♥ ♣rs ♦r Tc rr♥ t♠♣rtr rít

♥ ♦r♠s♠♦ ♥r♠♥t ♣r ♥ó♥ stró♥ ♦s r♣♦s ρ(2) s t♦♠ ♥ ♥t

s♥t ♣r♦①♠ó♥

ρ(2)(r, r′) = g(r, r′)ρ(r)ρ(r′) ∼ ρ(r)ρ(r′) ,

r q s s♣r strtr ♦♥t♥ ♥ g ♥ó♥ ♦rró♥ ♣rs ♥ st ♣r♦①♠ó♥

t③♥♦ ♦s ♦rs εff ② σff ♥ ♣♦t♥ q ♣r♠t♥ r♣r♦r ♠♥t r♠

s ♥ s s♠♦♥s ♥♠érs ♥♦ s ♦r r♣r♦r ♠♥r ó♣t♠ r ♦①st♥ íq♦♣♦r

♥ s ♣♥ ♦srr ♦s rst♦s q s ♦t♥♥ ♠♥t ♥♦ s t③ ♦♠♦ ♣♦t♥

♣rs ♣r ♥ ♦ ♦♠♦ Pr rst♦ ♦s ♦s q qí st♠♦s ♥♦ s ♦r♥ ♠♦rs

sts r s s ②

♦rs rst♦s s ♣♥ ♦♥sr s s tr ♦♥ ♣♦t♥ srr♦♦ ♣♦r ❲s ♥r ② ♥rs♥

♦ ❲ r ❬❪ ② ♣é♥ ② ①♣rsó♥ s

ΦWCA =

4εff

[

(σff

r

)12 −(σff

r

)6]

si r ≥ 21/6σff

−εff si r ≤ 21/6σff.

rá♦ ♣ ♦srrs ♥ ♦♥ s ♦ ♦♠♣r ♦♥ ♥ ♥ st s♦ s ♦♥sr♦ q

á♠tr♦ sr rí s ♣rá♠tr♦ σff ❲ ♣rsr ♦♠♣♦rt♠♥t♦ ♣r

r♦ r♥♦ ♣♦t♥ ♦ ♦♥ tér♠♥♦ trt♦ ♠s♠♦ s r ♦♥ tér♠♥♦ ♦rrs♣♦♥♥t

r−6 ♦ q s r♥t ♣r st♦ ♥ó♠♥♦s s♦ró♥

♥ q ♦rrs♣♦♥ ❬❪ s ♣ ♦srr r ♦①st♥ íq♦

♣♦r ♣r ♥ ♦ ♥♥r♦♥s ♠♥t st t♣♦ ♣♦t♥s t♥♥♦ ♥ ♥t tr♠♥s

♣r♦①♠♦♥s ♥ st rá♦ ♦s trá♥♦s s r♥ ó♥ st♦ ♣r♦♣st ♣♦r ♦♥s♦♥ ② ♦♦r

Page 42: Adsorción de fluidos sobre sustratos sólidos, estudiada

L−J

WCA

dHS

r P♦t♥ ♣rs ♥ ♥ó♥ st♥ ♥tr♠♦r ♥ ♥s rtrrs r ♣♥t♦s ② r②s♦rrs♣♦♥ ♣♦t♥ ❲ r tr③♦ só♦ r♣rs♥t ♣♦t♥ ♥ st s♦ s ♦♥sr♦ q dHS = σff

♦rs ❬❪ q st ♣rt♠♥t ♦s ♦rs ①♣r♠♥ts ♦s r♦s ♦rrs♣♦♥♥ á♦s r③♦s

♠♥t s♥♦ ♦♠♦ ♣♦t♥ ♣rs ♦rrs♣♦♥♥t srs rs ♦♥ ♥tr♦♥s trts

r♣rs♥ts ♣♦r ♣♦t♥ ❲ ♦♥ á♠tr♦ ♠♦r dHS s srs s t♦♠♦ ①♣rsó♥

rr♥rs♦♥ ❬❪

í♥ ♣♥t♦s ♦rrs♣♦♥ á♦s r③♦s t♠é♥ ♠♥t ② ♦♥ ♣♦t♥ ♣rs ❲ ♣r♦

♦♥ s t③ó ♠♦♦ ② ♦♦r♦rs ❬❪ ♥ á♠tr♦ ♠♦r ♣♥

t♠♣rtr ♥ s♦ í♥ só s ♦♥sr♦ á♠tr♦ ♠♦r ♦♠♦ ♥ ♦♥st♥t

σff

Pr ♠♦rr s ♣r♦♥s r♦♥s ♦①st♥ ss r♥♦ ♠♦ ② r③♦♥ ♥

st♦s s♦r s♦ró♥ r ♥ O2 ♥ ♥s②♦ ♦tr♦s ♣r♦♠♥t♦s ♥②♥♦ ♥ ss á♦s ①♣rs♦♥s

rs ♦r♠♦♥s ♥♦ ♦s ♦♠♦ ♣♦r ♠♣♦ r ♣ít♦ ♥♦ ♦rrt♦

rr♥ ❬❪ ♦①st♥ ss ♣ sr tr♠♥ s♥♦ ♣r ♣♦t♥ qí♠♦ ② ♣rsó♥

①♣rs♦♥s q r♥ ♥rí r ♠♦t③

F [ρ(r)] = FHS [ρ(r)] +1

2

ˆ

dr

ˆ

dr′ρ(r)ρ(r′)Φatt(|r− r′|) ,

♦♥ FHS ♦rrs♣♦♥ ♥rí r ♠♦t③ ♥ s srs rs ② Φatt s ♣rt trt

♣♦t♥ ♥tr♠♦r

Pr s♦ ♥ ♦ ♦♠♦é♥♦ ♥s ρ s s♣r♥♥ s ♦♥s st♦ ♥r③s

♥ r ❲s

P = PCSHS +

1

2bρ2,

µ = µCSHS + bρ,

Page 43: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.3 0.6 0.90.7

0.8

0.9

1

1.1

1.2

1.3

1.4

ρσ3

kT/ε

r r♠ ♦①st♥ ss íq♦♣♦r ♦rrs♣♦♥♥t ♥ ♦ st rá♦ ♦rrs♣♦♥ ❬❪ ♦s trá♥♦s s ♦t♥♥ ó♥ st♦ ♦♥s♦♥ ❬❪ ♦s r♦s í♥ ♣♥t♦s ② í♥ ♥ ♦rrs♣♦♥♥ á♦s r③♦s ♠♥t s♥♦ ♦♠♦ ♣♦t♥ ♣rs ❲♦♥ s ♥ t③♦ trs ♣r♦①♠♦♥s st♥ts ♣r á♠tr♦ q s s♥ s ♠♦és r t①t♦

♦♥

b =

ˆ

drΦattr,

s♥♦ PCSHS ② µCS

HS ♣rsó♥ ② ♣♦t♥ qí♠♦ rs♣t♠♥t ♦rrs♣♦♥♥ts ó♥ st♦

r♥♥tr♥ ♣r ♥ s srs rs ❬❪

sts ♦♥s s r t♠♣rtr rít Tc Pr s♦ r

kBTc =−0,09010

d3HS

b.

♥ tr♦s ♣r♦s ♥s ② r③♦♥ ❬ ❪ ♦♥ s ♥③ r s ♦♥sr ♦♠♦ ♣♦t♥ trt♦

Φatt t♦ ♣rt ♥t ♣♦t♥ t♠♣rtr rít q s r st♦s ♠♦♦s st s♥

t♠♥t ♣♦r ♦ t♠♣rtr rít ♠ ② trés ♦♥s ♥trs ♦ s

s♠♦♥s ♦♥t r♦

r③ó♥ st♦ s q ♣♦t♥ q ♣rt♣ ♥ ♥♦♥ ♥rí r ♠♦t③ r♣rs♥t

♣♦t♥ ♥tró♥ r ♣s♦ ♦♥ ♥ó♥ ♦rró♥ ♣rs ♣♦s ♥ ♣r♠r ♣♦ ♠②

♣r♦♥♥♦ r♦r ♠í♥♠♦ ♣♦t♥ ❱ r st ♠♥r s ♥r♠♥t r♦ s ♥tr♦♥s

trts ♣r♦ ♥ st ♠♦♦ ♠♣♦ ♠♦ s st ♦♥sr♥♦ q g = 1 ♥ t♦♦ ♣♥t♦ ♦ ♦ ♣r

♥tr♦r ♥ ♠♥r ♦s t♦s g s♥ ♣rr st q ♠♣rs

Φatt(r) = ΦL−J(r → ∞) = −4ε(σffr

)6

,

♣r ♣rr ♦rrt♠♥t s ♣r♦♣s ♠♦♦ ♦s t♦s t♦rs r♥ ♥ ♣rá♠tr♦ λ ♥ tér♠♥♦

r♣s♦ ② sí ♦♣t♥ s♥t ♣♦t♥ ♥tró♥ ♣rs

Page 44: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.3 0.61.1

1.2

1.3

ρ*

T*

Ar

r r♠ ♦①st♥ ss ♦rrs♣♦♥♥t r st r ♦rrs♣♦♥ rr♥ ❬❪♥ rá♦ s ♦♠♣r♥ s rs ♦t♥s ♠♥t t③♥♦ ♣♥t♦s í♥ só r♥t q♦t♥♥ ♦s t♦rs í♥ r② ♠♥t ♦r♠s♠♦

ΦBCT =

4εff

[

λ(σff

r

)12 −(σff

r

)6]

si r > λ1/6σff

0 si r ≤ λ1/6σff.

st♥♦ ♦r ♣rá♠tr♦ λ ♠♥r t ♦t♥r ♣r t♠♣rtr rít ♠s♠♦ ♦r q s

♦t♥ ♠♥t ♦r♠s♠♦ ♥s ♣r♦♥ts ♠♦♦ q ♣r♦♣♦r♦♥ ♥ ♠② ♥

st ♦s t♦s ①♣r♠♥ts

♥ s ♠str r ♦①st♥ r trés ♠♣♠♥tó♥ st ♣r♦♠♥t♦

st ② s ♦♠♣r ♦♥ ♦t♥ s t③♥♦ ♣♥t♦s st r ♦rrs♣♦♥

❬❪ óts q s ♦t♥ ♥ st rt♠♥t ♣t s♦♦ ♣r s ♣♦r

P♦str♦r♠♥t ♥♦tt♦ ② ♦♦ ❬❪ ♥ ♦♥t①t♦ ♥ t♦rí ♠♣♦ ♠♦ ♣rt♥♦

♣r♦♣st ♦♥sr♥ q t♠ñ♦ t♦ ♣r á♠tr♦ ♠♦r σff ♣♥ t♠♣rtr

♦ ♣♦t♥ ♣rs ΦBCT−AT ♦♣t♦ ♣♦r st♦s t♦rs s é♥t♦ ♦♥ s q

σff = σff (T )

ΦBCT−AT =

4εff

[

λ(

σff

r

)12

−(

σff

r

)6]

si r > λ1/6σff

0 si r ≤ λ1/6σff

.

♥ st s♦ ♦s ♣rá♠tr♦s λ ② σff (T ) s st♥ ♣r t♠♣rtr ♣r r♣r♦r ♠♥t s

♦♥♦♥s ♦①st♥ ♥tr íq♦ ② s ♣♦r ♥ qr♦ tr♠♦♥á♠♦ ② r ♥tr♦♥s ①tr♥s

s

P (ρv) = P (ρl) = Pcoex,

♦♥ ρv ② ρl r♣rs♥t♥ ♥ss ♣♦r ② íq♦ rs♣t♠♥t ② Pcoex s ♣rsó♥ ♦①st♥

♠s ss ♦s ♦rs ①♣r♠♥ts ♦①st♥ ♣♥ ①trrs ♣♦r ♠♣♦ ❬❪

Page 45: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥ ♥ ♥áss ♣♦str♦r ♥♦tt♦ ② ♦♦r♦rs ❬❪ t③♥ ♠s♠♦ ♣♦t♥ ♣r♦

r♥ ♥ ♣rá♠tr♦ ♦♥ ♥♦♥ tér♠♥♦ q ♦rrs♣♦♥ s st♦s trs ♣rá♠tr♦s ♦

s♦♥ st♦s s♠tá♥♠♥t ♣r r♣r♦r s ♦♥♦♥s ♦①st♥ ② st r

P (ρv) = P (ρl) = Pcoex

µ(ρv) = µ(ρl)

st ♠♦♦ ♣rs♥t ♣r♦♠s ♥♦ s ♥t♥t str ♦tr s ♠♣♦rt♥ts ♣r♦♣s qr♦ ♥

♦ ♥♦s rr♠♦s t♥só♥ s♣r s♣t♦ q ♥③r♠♦s ♥ ♣ít♦

str ♣r♦♣st

♦s♦tr♦s ♠♦s ♦♣t♦ ♦♠♦ ♣♥t♦ ♣rt ♣r♦①♠ó♥ r ♣ít♦ ♦♥ s ♥♦♥s

♣s♦ r♥ ♦ q ♦rr ♥ stá♥ ss ♥ ♦♠trí s ♣rtís q ♦♥stt②♥

♥ ♣r♥♣♦ t③r♠♦s ♥ rsó♥ ♣♦t♥ ♣rs Φ q ♦♥t♥ ♥ tér♠♥♦ ♦rrs♣♦♥♥t ♥

♣♦t♥ srs rs ② ♥ ♦♠♣♦♥♥t trt s♦ ♣♦t♥ ❲

r♥♦ ♥ ♦♥t①t♦ ♠♥t t③ó♥ st ♣♦t♥ ♠ás ♦r♦ t♠♣♦♦ s ♦r

♦♥sr ♥ ♥ st ♦s t♦s ①♣r♠♥ts ♦rrs♣♦♥♥ts ♦①st♥ ss ♦♠♦ ♣

♣rrs ♥ s s

♣r♦♣st st tss ♦♥sst ♥t♦♥s ♥ ♠♣r ♦♠♦ ♣♥t♦ ♣rt ♥ ♥♦♥ ♥s ♦♥ s

s♥ts rtrísts

♦♠♦ s ♦♠♥t♦ ♥ts ♦♠♣♦♥♥t trt ♣♦t♥ ♣rs srá ❲ ♣r♦ ♦♥ ♣rá♠tr♦s εff (T )

② σff (T ) st♦s s εff ② σff ♠♥r t r♣r♦r ♦s ♦rs ①♣r♠♥ts ♦①st♥ íq♦

♣♦r ② ♦rrs♣♦♥♥t ♥ ♦ ♥ qr♦ tr♠♦♥á♠♦ r ♥tr♦♥s ①tr♥s

♣rt r♣s st ♣♦t♥ ♦rrs♣♦♥rá srs rs á♠tr♦ dHS = σff (T )

s r

Φ =

∞ si r < σff

ΦWCA si r ≥ σff

tér♠♥♦ ♥♦♥ ♥s ♦ ♦♠♣♦♥♥t s ♣♦rá ♦♥t♥r ♦tr♦ ♣rá♠tr♦

♦♥ q t♠é♥ s st ♥ s♠tá♥♦ ♦♥ ♦s ♦s ♥tr♦rs ♣r r♣r♦r r ♦①st♥ ②

♦♥ó♥ st

♥ s♦ ♣♦r ♠♣♦ ♠♦tó♥ t③r ♥ t♦r ♦rró♥ ♥ tér♠♥♦ ♦rrs♣♦♥♥t

s q ♣♦r ♣rs♥ t♦s á♥t♦s Pr s♣rr st♦s t♦s ♥ s♦ ♦s

tó♠♦s rrs q ❬❪

Λ ≪ l

♦♥ Λ s ♦♥t ♦♥ tér♠ r♦ ② l r♣rs♥t s♣♦ ♥tr♣rtí r

l ≈ (V/N)1/3

= ρ−1/3

Page 46: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦

t♥ ♣r ♥ s sst♥s t♠♣rtr tr♣ ♥ ♥s ♦♥st♥t ♦t③♠♥ ② t♦r Λ/l q ♥ ♠♥t ♦s t♦s á♥t♦s ♥t♦ ♠ás r♥♦ ♥♦ s ♦r st ró♥♠ás ♠♣♦rt♥ts s♦♥ ♦s t♦s á♥t♦s

íq♦ Tt ❬❪ Λ/l

r♦♥♦ 2 ó♥ ró♥ ❳♥ó♥ Λ = 0,01194x10−9m

s ♥s s íq s tí♣ q ♣♦s ♣♦ró♥ ♥ ♣rsó♥ q ♦rrs♣♦♥

♦①st♥ ♦♥ s s ♣♦r s t♠♣rtr ♥ t s t♥ ♦s ♦rs ró♥ Λ/l

t♠♣rtr tr♣ ♣r ♦s ♦s ♦♥ ♦s q trt♠♦s ♥ st tr♦ ② s ♦♠♣r♥ ♦♥ ♦rrs♣♦♥♥t

ró♥♦ ♦♥ ró♥ ♣rát♠♥t ♥

st ♠♥r ♥ tér♠♥♦ ♦rró♥ s ás♦ s st t♥t♦ ♣r s♦ ♦♠♦ ♥ ♠♥♦r

r♦ ♣r r

P♦r ♦tr ♣rt ♣r t♠♣rtrs r♥s rít ♦♥ s t♦♥s s ♥ ♠♣♦rt♥ts ♣♦rí

strs ♣rs♥ st tér♠♥♦ ♦ ♣rt♠♥t♦ ♦♥ó♥ s ♦♠♦ ♦♥s♥

sts t♦♥s

st ♥♦♥

♥♥♦ ♥ ♥t ♦s ♣r♥♣♦s tr♠♦♥á♠ r♥ ♥rí ♥tr♥ s ♣ ①♣rsr ♥ tér♠♥♦s

r♥ ♥rí r

dE = dF + d(TS) =⇒ dF = dE − TdS − SdT = −PdV + µdN − SdT.

♣rsó♥ ② t♠é♥ ♣♦t♥ qí♠♦ ♣♥ rrs ♥rí r ♠♦t③

P = −(

∂F

∂V

)

T,N

= ρ2∂f

∂ρ,

µ =

(

∂F

∂N

)

T,V

= f + ρ∂f

∂ρ.

♥ sts ①♣rs♦♥s f = F/N s ♥rí r ♠♦t③ ♣♦r ♣rtí

st ♥rí s q ♦t♥r♠♦s s ♦♥s q sr♥ ♥str♦ ♦r♠s♠♦ ② ♠r♠♦s fDF

Pr s♦ ♥ ♦ ♦♠♦é♥♦ ♦♥ ♥tr♦♥s trts ♥tr s ♣rtís q ♦ ♦♥stt②♥ ♥rí

r s ♣ ①♣rsr ♦♠♦

fDF = fid +∆fHS +1

2bρ+ αkBT

[

ln(

Λ3ρ)

− 1]

=

= fHS +1

2bρ+ αkBT

[

ln(

Λ3ρ)

− 1]

Page 47: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦♥ ♦♠♦ ♥ts s ♥ b =´

Φattrdr Pr ♣♦t♥ b = −(32π/9)εffσ3ff ♠♥trs q ♣r

♣♦t♥ ♣r♦♣st♦ srá

b = −(32π√2/9)εff (T )σ

3ff (T )

tér♠♥♦ q ♦rrs♣♦♥ s ♠♦s r♦ ♥ ♣rá♠tr♦ ♦♥ q ♠♠♦s α q ♦rr

só♥ ♦♠♣♦rt♠♥t♦ ♦ ♦s t♦s á♥t♦s ♦ ♣r str ♠♦r ♦s ♦rs ♦①st♥

♥♥♦ ♥ ♥t s s ②

P (T ) = PHS(T ) + αkBTρ− (32π√2/18)εff (T )σ

3ff (T )ρ

2

µ(T ) = µHS(T ) + αkBT ln(

Λ3ρ)

− (32π√2/9)εff (T )σ

3ff (T )ρ

♥ ♥str♦ ♦♥t①t♦ tr♦ t♥t♦ ♣r ♣rsó♥ ♦♠♦ ♣r ♣♦t♥ qí♠♦ ♠♦♦ srs rs

PHS ② µHS ♦♣t♠♦s s q ♦rrs♣♦♥♥ ♦r♠ó♥ Prs❨ ❬❪ ♦♠♣t ♦♥ ♦r♠s♠♦

s r

PHS(T ) = PPYHS = kBTρ

(

1 + η + η2

(1− η)3

)

µHS(T ) = µPYHS = kBT

η

2

(

14− 13η + 5η2

(1− η)3

)

− ln(1− η) + ln(Λ3ρ)

♦♥ η s t♦r ♠♣qt♠♥t♦

η =π

6ρσ3

ff (T )

♦ t♥♥♦ ♥ ♥t ♦ ♥tr♦r ♣r t♠♣rtr s ♠♣♦♥ st ♦s ♦rs ♦①st♥

r♦s á♦ ♦s ♦rs ①♣r♠♥ts

P (ρl) = P (ρv) = P0

♥t♦ ♦♥ ♦♥ó♥ st

µ(ρv) = µ(ρl)

st ♠♣♦só♥ ♦s ♥♦s ♦rs εff σff q ♠♦s r♥♦♠r♦ ♦♥ εff (T ) ② σff (T ) ② ♦r α

♣♦st q st♦s ♦rs ♦s ♣r ♥ ♦ ♦♠♦é♥♦ s♦♥ ♦s ♣r♦♣♦s ♣r str ♣r♦♠s

♦s ♥♦♠♦é♥♦s ♦♠♦ ♦s q s ♣rs♥t♥ ♥♦ st♦s s♦♥ s♦r♦s s♦r sstrt♦s só♦s

st♦s ♦t♥♦s

♦♥t♥ó♥ ♥ ♦s r♥ts rá♦s s ①♥ ② s ♦♠♣r♥ ♦s rst♦s ♦t♥♦s ♣r ♦r♠s♠♦

♦♥ ♥♦♥ ♠♦♦ sú♥ ♥str ♣r♦♣st ♣r r ② ❳ ♥ r♥♦ t♠♣rtrs q

Page 48: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦

♥ st t s ♣♥ ♣rr ♦s ♦rs ♦rrs♣♦♥♥ts ♥t♥s ♥tró♥ ♦♦ á♠tr♦ ♠♦r ② s t♠♣rtrs tr♣s ② ríts r ② ❳ ♥t♦ s rr♥s ♦♥ r♦♥①trí♦s

♦ εff/kB ❬❪ σff ❬♥♠❪ Tt ❬❪ Tc ❬❪ ❬❪r ❬ ❪❳ ❬ ❪

♥ s ♣♥t♦ tr♣ rít♦ ♠♥t♦ ♥ st♦s rá♦s s ♣♥ ♦srr ♦s sts r

♦①st♥ ♥♦ s t③♥ ♣♦t♥s t♣♦ ♦ ❲ t♦♠♥♦ ♣r ♦s ♣rá♠tr♦s σff ② εff ♦s ♦rs

rr♥ q r♥ ♥ t

P♦r ♦tr♦ ♦ ♥ ró♥ ♣r♦♣st st tss s rr♦♥ s s♦♥s ♣♦r♥ts ♥ ♦r ♦s

♣rá♠tr♦s ❲ á♠tr♦ ♠♦r ♥t♥s ♣♦t♥ ♣rs ② ♦♥t s♦♦ s

♥ ♥ó♥ t♠♣rtr q ♣r♠t ♦rrt♦ st ♦s ♦rs ①♣r♠♥ts ♦①st♥

óts q s r♦♥s ♦s ♣rá♠tr♦s s♦♥ ♠á①♠s ♣r♦①♠rs t♠♣rtr rt ♦♥ ♦♠

♣rs s♦tér♠ χT r ② ♣♦r ♥ s t♦♥s ♥ ♥s s♦♥ ♠♣♦rt♥ts ♣s

< N2 > − < N >

< N >= ρkBTχT

♠é♥ s ♠str ♦♠♦ s ♠♦ ♣♦t♥ ♣rs ♥ ♥ó♥ st♥ r ♥tr ♠♦és

st ♦s ♣rá♠tr♦s ♦rrs♣♦♥♥ts ó♥

❱ró♥ á♠tr♦ ♠♦r ② ♥t♥s ♣♦t♥ ♣rs

♥ ♦s rá♦s s ♣♥ ♦srr ♦♠♦ s ♠♦♥ ♦s ♦rs ♦s ♣rá♠tr♦s ♣r str ♦s

t♦s ①♣r♠♥ts ♦①st♥ ♥ s♦ st ♦ í s ♠str♥ ró♥ ♣♦r♥t á♠tr♦

♠♦r tí♣♦ δσ ② ♥t♥s ♣♦t♥ ♣rs δε

s♦ á♠tr♦ ♠♦r sts s♦♥s s ♠♥t♥♥ ♣♦r ♦ ♠♥trs q ♣r ♣♦t♥

♥♦ s♣r♥ ♣r t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

♥ ♦s rá♦s s ♣♥ ♦srr ♦♠♦ ♠ ♦♥ t♠♣rtr tér♠♥♦ ♦rró♥ s

♣rá♠tr♦ ♥♦t♦ ♣♦r α ② t♠é♥ ♦♠♦ s ♠♦ ♠♥t ♣♦t♥ ♣r s t♠♣rtrs tr♣

② rít

t♦r q ♦rr tér♠♥♦ s s r ♥♦ t♠♣rtr st ♣rt t♠♣rtr

rít ♥ ♠♥♦s ♥ ❱ r st t♦r s ♠♥t♥ ♣rát♠♥t ♣qñ♦ s♦ ♥♦ t♠♣rtr

s r ♠s♦ rít ♥ ♥ st t♠♣rtr α s ♠♥t♥ ♣♦r ♦

♥ s♦ ♣♦t♥ ♣rs s s♦♥s rs♣t♦ ♣♦t♥ ❲ ♦ ♦♥ ♣rá♠tr♦s σ ② ε ♦s

♥♦ s♣r♥ ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít

Page 49: Adsorción de fluidos sobre sustratos sólidos, estudiada

25 30 35 40 450

10

20

30

40

50

T [K]

δσ(%

)

Tc

Tt

Ne

25 30 35 40 45

10

20

30

40

50

T [K]

δε

Tt

Tc

Ne

r ♠♦s rá♦s ♠str♥ ♦♠♦ ♥ ♠♦rs ♦s ♣rá♠tr♦s ♣♦t♥ ♥ ♥ó♥ t♠♣rtr ♣rstr r ♦①st♥ íq♦♣♦r ♥ rá♦ ③qr s ♣ ♦srr ó♠♦ ♠♦rs á♠tr♦ ♠♦r r s ♣ ♦srr ♠♦ ♥sr♦ ♥ ♥t♥s ♣♦t♥ ♣rs s ♠á①♠s s♦♥s ♥srs s♦♥ ♣r t♠♣rtrs r♥s rít

25 30 35 40 450

0.1

0.2

0.3

0.4

0.5

T [K]

Tt

Ne

Tc

α

0 0.2 0.4 0.6−50

−40

−30

−20

−10

r [nm]

Φa

ttr [

k BT

]

Ne

WCA

Tc

Tt

L−Jd

HS

r ③qr s ♦sr ♦r ♦♥t s ♥ ♥ó♥ t♠♣rtr ♦r ♣♦r♥t r ♣♦t♥ ♣rs ♦ ♣r t♠♣rtr rít r ♠r ♦♥ Tc ② tr♣ rsñ ♦♥ Tt s r ♥t♦ ❲ r r② rst♥t r ♦rrs♣♦♥ ♥

Page 50: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 4025

30

35

40

45

50

ρ [nm−3]

T [

K]

Ne

WCA

L−J

r ♦①st♥ ss íq♦♣♦r ♦sr ♥ í♥ ♥ r ♦①st♥ ♦rrs♣♦♥♥t t♦s ①♣r♠♥ts ♦s ír♦s ♥r③♦s ♥ s í♥ ♦rrs♣♦♥♥ ♦s ♦rs ♦s t③♥♦ ♥str♣r♦♣st P♦r ♦ ♥ í♥ r②s s ♠str♥ ♦s rst♦s á♦ ♠♥t ♦r♠s♠♦ ♥♦♥ ♦♠♦ ♣♦t♥ ♣rs s t③ó ♥ ♥ í♥ r②s ② ♣♥t♦s s ♠str♥ ♦s rst♦s ♦s♥tr♦ ♠s♠♦ ♦r♠s♠♦ ♣r♦ t③♥♦ ♦♠♦ ♣♦t♥ ♣rs ❲

rs ♦①st♥ íq♦♣♦r ó♥

♥ s ♠str ♦♠♦ ♥♦s ♠♦♦s ♣♦t♥ t③♦s ♥tr♦ ♥ ♦r♠s♠♦ st♥

r ♦①st♥ íq♦♣♦r óts ♦s ♠r♦s rst♦s q s ♦♥s♥ s s t③ ♥ ♣♦t♥

♦♥ ♥ ♣♦t♥ ♦♠♦ ❲ st s ♠ás ♣rs♦ ♥ ♥ r♥♦ ♥♦ ♠② ♠♣♦ ♥ss

á♦s ♦rrs♣♦♥♥ts ró♥

❱ró♥ á♠tr♦ ♠♦r ② ♥t♥s ♣♦t♥ ♣rs

♥ st s♦ ró♥ ♣♦r♥t á♠tr♦ ♠♦r s ♠♥t♥ ♣♦r ♦ ♣r

♣rát♠♥t t♦♦ r♥♦ t♠♣rtr ♥t♥s ♣♦t♥ ♣rs s sí ♥ ♥♦ ♠ás

♠♥t♥é♥♦s ♣♦r ♦ st ♦s s r st ♥ t♠♣rtr ♦rrs♣♦♥♥t

rít

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

♦r ♦♥t α s ♠♥t♥ ♣♦r ♦ st ♥ t♠♣rtr ♦rrs♣♦♥♥t rít

♦r ♠á①♠♦ q ♥③ s ♥ t♠♣rtr rít

♥ s♦ ♣♦t♥ ♣rs s s♦♥s rs♣t♦ ♣♦t♥ ❲ ♦ ♦♥ ♣rá♠tr♦s σ ② ε ♦s

♥♦ s♣r♥ ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít

rs ♦①st♥ íq♦♣♦r

Page 51: Adsorción de fluidos sobre sustratos sólidos, estudiada

80 100 120 140 1600

10

20

30

40

50

T [K]

δσ(%

) Ar

Tt T

c

80 100 120 140 1600

10

20

30

40

50

T [K]

δε

ArT

cT

t

r ♠♦s rá♦s ♠str♥ ♦♠♦ ♥ ♠♦rs ♦s ♣rá♠tr♦s ♣♦t♥ ♥ ♥ó♥ t♠♣rtr ♣rstr r ♦①st♥ íq♦♣♦r ♥ rá♦ ③qr s ♣ ♦srr ♦♠♦ rrs á♠tr♦ ♠♦r r s ♣ ♦srr ♠♦ ♥sr♦ ♥ ♥t♥s ♣♦t♥ ♣rs s ♠á①♠s s♦♥s ♥srs s♦♥ ♣r t♠♣rtrs r♥s rít

80 100 120 140 1600

0.1

0.2

0.3

0.4

0.5

T [K]

α

ArT

cT

t

0 0.2 0.4 0.6 0.8−150

−125

−100

−75

−50

−25

r [nm]

Φa

ttr [

k B T

]

dHS Ar

WCA

Tc

Tt

r ③qr s ♦sr ♦r ♦♥t s q ♣r ♥ ♥str♦ ♥♦♥ ♥ ♥ó♥ t♠♣rtr r ♣♦t♥ ♣rs ♦ ♣r t♠♣rtr rít í♥ ♠r ♦♥ Tc ② tr♣í♥ sñ ♦♥ Tt s r ♥t♦ ❲ í♥ r② rst♥t r ♦rrs♣♦♥ ♥

Page 52: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 5 10 15 20 2580

100

120

140

160

ρ [nm−3]

T [

K]

Ar

WCA

L−J

r ♦①st♥ ss íq♦♣♦r r ♦sr r ♦①st♥ ♦rrs♣♦♥♥t t♦s ①♣r♠♥ts í♥ ♥ ♦s ír♦s ♥r③♦s ♥ s í♥ ♦rrs♣♦♥♥ ♦s ♦rs st♦s t③♥♦ ♥str♦♥♦♥ ♥s P♦r ♦ ♥ í♥ r②s s ♠str♥ ♦s rst♦s á♦ ♠♥t ♦r♠s♠♦ ♥ ♦♥ ♦♠♦ ♣♦t♥ ♣rs s t③ó ♥ ♥ í♥ r②s ② ♣♥t♦s s ♠str♥ ♦srst♦s ♦s ♥tr♦ ♠s♠♦ ♦r♠s♠♦ ♣r♦ t③♥♦ ♦♠♦ ♣♦t♥ ♣rs ❲

♥ s ♣ ♦srr r ♦①st♥ íq♦♣♦r r óts q q ♥

s♦ ♥tr♦r ♥♦ s ♦♥s♥ ♥♦s rst♦s ♥♦ s t③ ♦♠♦ ♣♦t♥ ♣rs ♥ ♠♥trs q

♣♦t♥ ❲ s ♥ ♦♥s ♥ ♠♦r rst♦ t♥♥ r ♥t ♥ st ♥♦ ♥♦r♠

♥♠♥t♠♥t ♣r r♥♦ ♥s q ♦rrs♣♦♥ s íq

á♦s ♦rrs♣♦♥♥ts ❳♥ó♥

á♠tr♦ ♠♦r ② ró♥ ♣r♦♥ ♣♦t♥ ♣rs

♥ ♦s rá♦s s ♠str♥ ♦♠♦ ♥ ♠♦rs ♦r st♦s ♣rá♠tr♦s ♣r ♦♥sr str

r ♦①st♥ íq♦♣♦r ró♥ ♥ á♠tr♦ ♠♦r s ♠♥t♥ ♣♦r ♦ st

♥ t♠♣rtr ♦rrs♣♦♥♥t rít ♠á①♠ só♥ s ♣r♦① ♥ ② s ♥③ ♥

t♠♣rtr rít ♥ ♥t♦ ♥t♥s ♣♦t♥ ♥tró♥ s ró♥ s ♠♥t♥ ♣♦r ♦

st ♥ t♠♣rtr s rít ♥ st ♦r t♠♣rtr st ró♥ ♥③

♥ ♠á①♠♦

❱ró♥ ♦♥t s ② ♣♦t♥ ♣rs ♥ ♥ó♥ st♥

Pr ❳ ♦♥t α s ♠♥t♥ ♣♦r ♦ st ♣r♦①♠♠♥t ♥ t♠♣rtr

s r st ♣r♦① rít ♥③♥♦ ♦r ♣rát♠♥t ♥ t♠♣rtr rít

♥ s♦ ♣♦t♥ ♣rs s s♦♥s rs♣t♦ ♣♦t♥ ❲ ♦ ♦♥ ♣rá♠tr♦s σ ② ε ♦s

♥♦ s♣r♥ ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít

rs ♦①st♥ íq♦♣♦r

Page 53: Adsorción de fluidos sobre sustratos sólidos, estudiada

150 200 250 3000

10

20

30

40

50

T [K]

δσ(%

) XeT

tT

c

150 200 250 3000

10

20

30

40

50

T [K]

δε

Tt

Tc

Xe

r rá♦ ③qr ♠str ó♠♦ ♠r á♠tr♦ ♠♦r ♣r ♦♥sr ♥ ♥ st r ♦①st♥ íq♦♣♦r r s ♣ ♦srr ♠♦ ♥sr♦ ♥ ♥t♥s ♣♦t♥ ♣rs s ♠á①♠s s♦♥s ♥srs ♦rrs♣♦♥♥ t♠♣rtrs r♥s rít

150 200 250 3000

0.1

0.2

0.3

0.4

0.5

T [K]

α

Tc

Tt

Xe

0 0.2 0.4 0.6 0.8−300

−250

−200

−150

−100

−50

r [nm]

Φa

ttr [

k BT

]

Xe

L−J

TcT

t

WCA

dHS

r ③qr s ♦sr ♦r ♦♥t s q ♣r ♥ ♥str♦ ♥♦♥ ♥ ♥ó♥ t♠♣rtr r ♣♦t♥ ♣rs ♦ ♣r t♠♣rtr rít í♥ ♠r ♦♥ Tc ② tr♣í♥ sñ ♦♥ Tt s r ♥t♦ ❲ í♥ r② rst♥t r ♦rrs♣♦♥ ♥

Page 54: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 5 10 15150

200

250

300

ρ [nm−3]

T [

K]

Xe

WCA

L−J

r ♦①st♥ ss íq♦♣♦r ❳ ♦sr r ♦①st♥ ♦rrs♣♦♥♥t t♦s ①♣r♠♥ts í♥ ♥ ♦s ír♦s ♥r③♦s ♥ s í♥ ♦rrs♣♦♥♥ ♦s ♦rs st♦s t③♥♦ ♥str♦♥♦♥ ♥s P♦r ♦ ♥ í♥ r②s s ♠str♥ ♦s rst♦s á♦ ♠♥t ♦r♠s♠♦ ♥ ♦♥ ♦♠♦ ♣♦t♥ ♣rs s t③ó ♥ ♥ í♥ r②s ② ♣♥t♦s s ♠str♥ ♦srst♦s ♦s ♥tr♦ ♠s♠♦ ♦r♠s♠♦ ♣r♦ t③♥♦ ♦♠♦ ♣♦t♥ ♣rs ❲

♥ s ♣♥ ♦srr ♦s sts ♦r♦s ♥♦ ♥ s t③♥ ♦♠♦ ♣♦t♥s ♣rs

♦ ❲ s♦ s t♥ tr♦ ♦♠♦ ♣r ② r ♥ ♥t♦ ❲ ♥ s♦ s

♣♦r s ♦t♥ ♥ st r③♦♥ ♣r ♥ ♣r♦① r♥♦ ♥s q ♦rrs♣♦♥ s s

Page 55: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 56: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♥só♥ s♣r

♥t ♣r♦♠♥t♦ ♦♣t♠③ó♥ ♥♦♥ ♣r♦♣st♦ ♥ st ss s ó t♥só♥ s♣r

♥trs íq♦♣♦r ♥ ♥ó♥ t♠♣rtr ♣r r ② ❳ ♦s ♦rs ①♣r♠♥ts

r♦♥ ①trí♦s ❬❪ ♣r♦♠♥t♦ ♣r♦♣st♦ ♥ st ss ♣r ♦♣t♠③r ♥♦♥ ♥♦s ♣r♠tó

♣rr ♦♥ ♣rsó♥ ♦s ♦rs t♥só♥ s♣r ♣r ♦s ♦s q qí st♠♦s só♥

rs♣t♦ ♦s t♦s ①♣r♠♥ts ♥♦ s♣r ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít

r ♥tr♦ó♥

t♥só♥ s♣r ♥trs íq♦♣♦r ♦rrs♣♦♥♥t ♥ ♦ ♥ qr♦ tr♠♦♥á♠♦ s

♦♥s♥ ♥ r③s ♥tr♠♦rs ♦ ♥trtó♠s ② ♣♥ s t♠♣rtr

st t♥só♥ γlv ♣ r♦♥rs ♦♥ t♠♣rtr rít ♦ ♠♥t ♥ ①♣rsó♥ sr t♦rí

♥ó♠♥♦s rít♦s

γlv = γ0lv

[

1− T

Tc

]p

.

♥ st ①♣rsó♥ γ0lv ♣♥ s rtrísts ♦ ② p s ♥ ①♣♦♥♥t rít♦ ②♦ ♦r s♦ st♠♦

♣♦r r♥ts t♦rs ♦ r♥ts ♦♥sr♦♥s ❬❪

P♦r ♠♣♦ ❲♦♠ ❬❪ ♦ st♠ó ♥t♥♦ s♣s♦r ♥trs íq♦♣♦r ♦♥ ♦♥t

♦rró♥ q ♣r♦♥ ♦rí ♦rró♥ ♦r srr♦ ♣♦r r♥st♥ ❩r♥ ② ②

r♦ ♠♦♦ ♦♣t♦ s st♦s ♦ ♦ ♦♥t♥♦ ♦s ♦rs q ♦t♦ r♦♥ ♦

♥ ♥ tr♦ ♣♦str♦r ♠t ② ♦♦r♦rs ❬❪ s ♥③ó ♥ ♠str ❳ t ♣r③ ♦♥t♠♥♦

♦ s♠♦ ♦♥ ♣♣♠ ♥ ♦♠♥ ♥tró♥♦ ② ♣♣♠ r Pr st ♠str s ♥♦♥tró q ♦s ♣rá♠tr♦s

ó♣t♠♦s ♥

γ0lv = 54.6± 0.1 dyn cm−1

p = 1.287± 0.017

Page 57: Adsorción de fluidos sobre sustratos sólidos, estudiada

r rt♥r t③ ♣r rs♦r s ♦♥s ♥ ♦♥t①t♦ s ♣rs ♣rs ♥trs stá♥ s♣rs ♥ st♥ ② ♥♦ ♥trtú♥ ♦♥ ♦ q s ♥♥tr ♥tr s Pr á♦ s♦♥sr q ①t♥só♥ ♥ sts ♣rs ♥ ♥♥t ♥ st sq♠ z r♣rs♥t ♦♦r♥ ♣♦só♥ t♦♠♥♦ ♦♠♦ ♦r♥ ♦♦r♥s ♣r ③qr

♥ ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ ② rít st♦s ♦rs ♣r♠t♥ ♣rr ♦♥

♣rsó♥ t♥só♥ s♣r ♥ ♥ r♥♦ str♦ t♠♣rtrs ♥ t♦r♥♦ rít ♦s ♦rs q ♣r

st ♠♦♦ ♦♥ ♦s ♥tr♦rs ♣rá♠tr♦s s sí♥ ♦s ①♣r♠♥ts ♥ ♠ás ♥ t♥só♥

s♣r ♥ st r♥♦ str♦ ♠ ♣r ❳ ♣♦r ❩♦ ② ♦♦r♦rs ❬❪ t③♥♦ té♥s

s♣tr♦s♦♣ ó♣t ♠③ ♥ st té♥ s ♥③ s♣tr♦ ③ q s ♥ ♥ást♠♥t ♥

♥trs íq♦♣♦r ♦ s ①t♦♥s tér♠s ❬ ❪

♥só♥ s♣r ② ♣♦t♥ tr♠♦♥á♠♦

t♥só♥ s♣r ♥trs íq♦♣♦r s ♣ r trés r♥ ♣♦t♥ Ω

γlv =1

2A[Ω + P0V ] =

1

2[Ω/A+ P0L] .

♦♥

Ω = F − µN .

♥ P0 r♣rs♥t ♣rsó♥ stró♥ ♣♦r ♦rrs♣♦♥♥t ♥ tr♠♥ t♠♣rtr

N s ♥ú♠r♦ ♠♦és ♦ ② L s ♥♦ r ♥tr♦ s rs♥ s

♦♥s ♥ ♦♥t①t♦ t③♥♦ ♣r ♦ ♣r♦♣st ♣rs♥t ♣r ♥♦♥ ❬ ❪

♥ ♦s á♦s s t♦♠ ♥ ♦r ♦ ♣r N r ♦s á♦s s♦♥ r③♦s ♥tr♦ ♦r♠s♠♦ ♥ó♥♦

Page 58: Adsorción de fluidos sobre sustratos sólidos, estudiada

s ♣rs ♥♦ ♥trtú♥ ♦♥ s ♠♦és ♥q ♥ ♦♥♦♥s ♦♥t♦r♥♦ s♦r ♥s s

♠♦és ♦ ♥trtú♥ ♥tr sí ♠♥t ♥ ♣♦t♥ Uff (r) = Φ (|r− r′|)

s s♣♦♥ q ♣r♦♠ s ♥♠♥s♦♥ s♦ ♦♥srr q ár s ♣rs t♥ ①t♥só♥

♥♥t ♥♥♦ z ♦♠♦ r ♣♦só♥ s ♠♣♦♥

ρ(z = 0) = ρ(z = L) = 0 .

Pr rs♦r s ♦♥s ♦♥ s s ♦♥♦♥s ♦♥t♦r♥♦ ♣rós s ♦ s♥t♠♥t

♥ ♦♠♦ ♣r srr q ♦ s ♥♥tr ♥ s íq ♥ ♥tr♦ r♦♦ s ♣♦r

♥ s ♣rs ♠s♠ s r

ρ(z ≃ L/2) = ρl(T ) .

♥ ♥str♦s á♦s ♠♦s ♦♣t♦ ♥♦s ♦ 60σff

s ♦♥s s ♣♥ srr ♦♠♦

νidkBT ln[

Λ3ρ(z)]

+Q(z) = µ .

♦♥

Q(z) = fHS [ρ(z); dHS ] +

ˆ L

0

dz′ρ(z′)δfHS [ρ(z′); dHS ]

δρ(z′)

δρ(z′)

δρ(z)

+

ˆ L

0

dz′ρ(z′)Φatt (|z − z′|) + Usf (z) .

♦♠♦ s ♦♥sr q ♥♦ ①st ♥tró♥ ♥tr ♦ ② s ♣rs r♣♥t q ♦ ♦♥t♥♥ Usf (z) = 0

Pr rs♦r sts ♦♥s s út rsrrs s♥t ♠♥r

ρ(z) = ρ0 exp

( −Q(z)

νidkBT

)

,

♦♥

ρ0 =1

Λ3exp

(

µ

νidkBT

)

,

♣♦r ♦tr♦ ♦ s ♥ ♥ú♠r♦ ♣rtís ♣♦r ♥ ár

n =1

A

ˆ L

0

ρ(z)dz .

ró♥ ♥tr ♣♦t♥ qí♠♦ ♦ ♠t♣♦r r♥ s t♥♠♦s ♥ ♥t q tr♠♦s ♥

♦r♠s♠♦ ♥ó♥♦ ② n q ♦♥stt② ♥ t♦ ♥str♦ ♣r♦♠ s ♦t♥ sstt②♥♦ ♥

st ♠♥r

µ = −νidkBT ln[

1

nΛ3

ˆ L

0

dz exp

( −Q(z)

νidkBT

)

]

.

st sst♠ s rs trt♠♥t ♥♥♦ ♦♠♦ s♠♥t s rs ♠♥s♦♥s ts ♦♠♦

Page 59: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 40 50 600

0.2

0.4

0.6

0.8

z*

Ne

ρ*

r ♥s ♥ ♥ó♥ st♥ ♥ s ♣rs ♣r r♥ts ♦rs t♠♣rtr ♦st ♦♥♥♦ ♥ ♥ rt♥r ♥ ♥♦ q♥t 60σff s t♠♣rtrs ♥ í♥ ♣♥t♦s í♥ r②s ② í♥ só

z∗ =z

σff,

ρ∗ = ρσ3ff ,

L∗ =L

σff.

♥ s ♣ ♦srr ♠♦♦ ♠♣♦ ♥♦s ♣rs ♥s q s ♦t♥♥ ♦ rs♦r

sts ♦♥s ♣r s♦ ♣r r♥ts ♦rs t♠♣rtr ♥ st s♦ s t③ó ♥

60σff ♥♦ ♦♥ σff = ♥♠

♥só♥ s♣r ♥trs íq♦♣♦r ó♥

♥ ♥ tr♦ ♥♦tt♦ rtr♦♦ ♦♦ ② ♦ ❬❪ s t♥só♥ s♣r st ♦ ♥

♦♥t①t♦ ♥ t♦rí ♠♣♦ ♠♦ t③♥♦ ♣r ♦ ♥ ♣♦t♥ ♣rs t♣♦ ♦♥ ♣rá♠tr♦s

♣♥♥ts t♠♣rtr r ♣ít♦ ♦s ♦rs st♦s ♣rá♠tr♦s r♦♥ ♦s ♣rtr ♥

♣r♦♣st r♥♦ ♠♦ ② r③♦♥ ❬❪ ♦s t♦s t♦rs ♦♥str②♥ ♣♦t♥ ♠♥r t

s♠r t♦ ♥ó♥ ♦rró♥ ♣rs g(|r− r′|) ♥♦ ♠ás ♣r♦♥♦ ♠í♥♠♦ q ♣♦s

♣♦t♥ ♥ s ♦♠♣r ♣rt trt ♣♦t♥ ♦♥ ❲ ② ♦♥ ♣r♦♣st

♦rrs♣♦♥♥t

Page 60: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8−2.5

−2

−1.5

−1

−0.5

0

0.5

1

r [nm]

Φa

ttr(r

)/k B

T T=30 K

dHS

Ne

r P♦t♥ ♣rs ♥ ♥ó♥ st♥ ♥trtó♠ ♣r r só ♦rrs♣♦♥ ♣♦t♥ r ♥ í♥ r② s ♣♦t♥ ♣r♦♣st♦ ♣♦r ♥♦tt♦ rtr♦♦ ♦♦ ② ♦ ❬❪♦ ♥ t♠♣rtr í♥ ♣♥t♦s ② r②s ♦rrs♣♦♥ ♣♦t♥ ❲ á♠tr♦ ssrs rís s ♥ ♦♥ dHS

♥ ♣♥ ♦srrs ♦s rst♦s ♦s á♦s ♥t♦ ♦s rst♦s q ♥♦s♦tr♦s ♠♦s

♦ ♠♣♥♦ ♥str ♣r♦♣st st ♥♦♥ ♥ s rs s ♣ ♣rr ♥

t♥♥ r♥ t♥só♥ s♣r ♥♦ t♠♣rtr s ♣r♦①♠ tr♣ ♦s t♦rs

♥♦ ♠str♥ rst♦ ss á♦s ♣r ss t♠♣rtrs s ♠♥t ♠á①♠ q ♥ s r♥♦ ①st♥

t♦s ①♣r♠♥ts ♣r ❬❪

♥ s ①♥ rrs q ♦rrs♣♦♥♥ s s♦♥s ♣♦r♥ts ♦s rst♦s ② s

♦♠♣r♥ ♦♥ s s♦♥s ♦s rst♦s q ♥♦s♦tr♦s ♠♦s ♦t♥♦

♥só♥ s♣r ♥trs íq♦♣♦r ró♥

♥ s ①♥ ♦s ♦rs t♥só♥ s♣r r q ♠♦s ♦t♥♦ ② t♠é♥ ♦s ♦rs

♦s ♠♥t t♦rí ①♣♦♥♥ts rít♦s ② s♠♦♥s q ♠♣♥ s ♥t ♣♦r r♦②♠

①♥r ❬❪ Pr r③r s s♠♦♥s ♦s t♦rs ♥ ♦♠♦ r♦ ♦rt ♣♦t♥

st♥s ♥trtó♠s s♣r♦rs ♦s ② á♠tr♦s ♠♦rs s r ♣♦t♥ s t♦♠ ♦♠♦ ♥♦

♣r st♥s s♣r♦rs st♦s ♦rs

♥ s ♥ r♦ s s♦♥s ♣♦r♥ts ♥tr ♦s ♦rs ♦s ♣♦r ♦s rs♦s ♠ét♦♦s ②

♦s t♦s ①♣r♠♥ts

Page 61: Adsorción de fluidos sobre sustratos sólidos, estudiada

20 25 30 35 40 450

1

2

3

4

5

T [K]

γ lv/k

B

Tt T

c

Ne

r ♥só♥ s♣r ♥ ♥ó♥ t♠♣rtr rtr ③②s③ ② ❯rrt ❬❪ ♦s r♦s ♥r♦s♦rrs♣♦♥♥ t♦s ①♣r♠♥ts í♥ ♣♥t s ♦t♥ ♠♥t t♦rí ♥ó♠♥♦s rít♦s ♦♥ γ0lv = 1135 ♥♠2 ② p = ♦s trá♥♦s s♦♥ ♦s ♦rs ♦s ♣♦r ♥♦tt♦ rtr♦♦ ♦♦ ②♦ ❬❪ óts q ♦s ♠♥♦♥♦s t♦rs ♥♦ ①♥ á♦s ♥ ③♦♥ ♦♥ ② ♦rs ①♣r♠♥ts ♦sír♦s ♦rrs♣♦♥♥ ♥str♦s á♦s

25 30 35 40 45−10

0

10

20

30

40

T [K]

∆γ

Tt

Tc

Ne

r s♦♥s ♣♦r♥ts ♥tr ♦s ♦rs ♦s t♥só♥ s♣r ② ♦s sts t♦s ①♣r♠♥ts s ♦♠♥s ③s ♦rrs♣♦♥♥ ♦s á♦s s ♦♠♥s r♦s ♦rrs♣♦♥♥ ♥str♦sá♦s óts t♥♥ s s♦♥s ♦rrs♣♦♥♥ts ♦s á♦s ♥♦ t♠♣rtr sr tr♣ P♦r ♦tr♦ ♦ ♥ s r♥ís ♣♥t♦ rít♦ ♥strs s♦♥s s ♠♥t♥♥ ♣♦r ♦ ② ♥♦ s♣r♥ ♥ ♠♣♦ r♥♦ st ♦r ♠♥trs q ♦s t♦s t♦rs ♥③

Page 62: Adsorción de fluidos sobre sustratos sólidos, estudiada

80 100 120 140 1600

2

4

6

8

10

12

T [K]

γ lv/k

B [1

02 K/n

m2 ]

Tt

Tc

Ar

r ♥só♥ s♣r r ♥ ♥ó♥ t♠♣rtr rtr ② ③②s③ ❬❪ r r②s ♦rrs♣♦♥ t♦rí ♥ó♠♥♦s rít♦s ♦s r♦s r♥♦s s♦♥ t♦s ①♣r♠♥ts ❬❪ ♥t♦ trá♥♦s ♦♠♦♦s ♠♥ts ♦rrs♣♦♥♥ á♦s ♥á♠ ♦r ♦♥ r♥ts r♦s ♦rt t♦ rc ♣r ♣♦t♥ ♣rs ♦s trá♥♦s s s♦♥ ♥ r♦ ♦rt rc = σff ② ♦s ♠♥ts rc = σff ❬❪♦s ír♦s ♦rrs♣♦♥♥ ♥str♦s á♦s

80 100 120 140 1600

10

20

30

40

50

60

T [K]

∆γ

Tt

Tc

Ar

r s♦♥s ♣♦r♥ts ♥tr ♦s ♦rs ♦s ② ♦s t♦s ①♣r♠♥ts ♦rrs♣♦♥♥ts t♥só♥s♣r ♥trs íq♦♣♦r r s ♦♠♥s ③s ♦rrs♣♦♥♥ só♥ q ♣r♦♥♥t ♦♠♣rr ♦s t♦s ①♣r♠♥ts ♦♥ ♦s ♦t♥♦s ♠♥t s♠♦♥s ♥á♠ ♦r ♣r r♦s ♦rt rc = σff ❬❪ s ♦♠♥s rs ♦s á♦s r♦s ♠s♠♦ ♦r♠s♠♦ ♣r♦ ♦♥ rc = σff❬❪ s ♦♠♥s r♦s ♦rrs♣♦♥♥ ♦♠♣ró♥ ♦rs ①♣r♠♥ts ♦♥ ♥str♦s á♦s

Page 63: Adsorción de fluidos sobre sustratos sólidos, estudiada

160 180 200 220 240 260 280 3000

2

4

6

8

10

12

14

16

T [K]

γ lv/k

B [1

02 K /n

m2 ] Xe

Tt T

c

r ♥só♥ s♣r ❳ ♦♠♦ ♥ó♥ t♠♣rtr ♦s trá♥♦s r♥♦s ♦rrs♣♦♥♥ t♦s ①♣r♠♥ts ❬❪ ♦s r♦s r♥♦s ♦rrs♣♦♥♥ t♠é♥ t♦s ①♣r♠♥ts ♦s trés ♣r♦♠♥t♦s♠ás s♦st♦s ♦♠♦ ♦ ♦♥stt②♥ s té♥s s♣tr♦s♦♣ ó♣t ♠③ ❬❪ s rs r②s ② ♦♥r②s ② ♣♥t♦s s♦♥ rst♦s ♦t♥♦s s ♥ t♦rí ①♣♦♥♥ts rít♦s ❬ ❪ ♦s ♠♥ts ② strs♦rrs♣♦♥♥ s♠♦♥s ♦♥ s t③ó ♥ ♣♦t♥ ♣rs ♦♥ r♥ts ♦rs r♦ ♦rt❬ ❪ ♦s ír♦s ♦rrs♣♦♥♥ ♥str♦s á♦s

♥só♥ s♣r ♥trs íq♦♣♦r ❳♥ó♥

♠str t♥só♥ s♣r ❳ ♥ ♥ó♥ t♠♣rtr í s ♦r♦♥ ♦s ♦rs ♦t♥♦s

s♥♦ ♥♦♥ ♥str♦ srr♦♦ ♥ ♣ít♦ ♥t♦ ♦rs ①♣r♠♥ts ② ♦s ♦s trés

té♥s s♣tr♦s♦♣ ó♣t ♠③ ❬❪

r♥ t♠é♥ ♦rs ♦t♥♦s ♠♥t ♥ t♦rí ①♣♦♥♥ts rít♦s ② ♠♥t s♠♦♥s

♥á♠ ♦r ♥ rá♦ s rs r②s ② ♦♥ r②s ② ♣♥t♦s s♦♥ rst♦s ♦t♥♦s s ♥

t♦rí ①♣♦♥♥ts rít♦s ❬ ❪ r♦s st♦s t♦s s ♦t♥♥ ♦s ♦rs γ0lv = 3950 ♥♠2 ②

p = ♣r r ♦♥ r②s ② γ0lv = 4460 ♥♠2 ② p = ♣r rst♥t

♥ s ♣ ♣rr ♠♦♥t♦ s s♦♥s ♣♦r♥ts ♥tr ♦s r♥ts ♦rs ♥ st

s♦ s ♦♠♣r♥ ♦s ♦rs ①♣r♠♥ts ♦♥ ♦s q s ♥ ♠♥t ♥á♠ ♦r ② Pr

s♦ s t③♥ r♦s ♦rt ② σff

Page 64: Adsorción de fluidos sobre sustratos sólidos, estudiada

150 200 250 300−20

−10

0

10

20

30

T [K]

∆γ

XeT

tT

c

r s♦♥s ♣♦r♥ts ♥ ♥ó♥ t♠♣rtr ♥tr ♦s ♦rs ①♣r♠♥ts ② ♦s ♦s ♠♥t♥á♠ ♠♦r ② ♥ r s♦♥s ♦s ♦rs ♦t♥♦s ♥ s♠♦♥s q ♥ s♦ ♥á♠ ♦r ♣r ♥ r♦ ♦rt σff q ♣r s ♦♠♥s rs ♣r♦ ♦♥ ♥ r♦ ♦rt σff ♥ r♦♦ s♦♥s ♦s ♦rs q ♣r♥ ♦s á♦s r③♦s ♦♥ ♥str♦ ♥♦♥

Page 65: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 66: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

s♦ró♥ s♦r sstrt♦s ♣♥♦s

♣rs♥t♥ ② ♥③♥ ♦s rst♦s ♦t♥♦s st♦ s♦ró♥ r ② ❳ s♦r sstrt♦s ♣♥♦s

♦♥♦r♠♦s ♣♦r r♥ts ♠♥t♦s ♥♦s sr s ② ♥ ♥♦ st♦s sstr

t♦s s ♠♥st♥ ♥ó♠♥♦s ♦♥ rtrísts ♣r♦♣s ♦ ás♠♥t ♥t♥s ♣♦t♥ ♦♥

q ♥trtú♥ ♦♥ ♦ q s s♦r s♦r ♦s ♦s ♣♦t♥s t③♦s t♥t♦ ♣♦t♥ ♣rs

♦♠♦ ♦rrs♣♦♥♥t ♥tró♥ sstrt♦♦ s♦♥ ♣♦t♥s rsts ♥ s♥t♦ q ♣r♠t♥ ♣rr

♠♥t ♦s ♦rs ①♣r♠♥ts q t♦♠♥ rts ♠♥ts r♥ts ts ♦♠♦ ♣rsó♥ ♦①s

t♥ ♥s ② ♣♦t♥ qí♠♦ ♦rrs♣♦♥♥ts ♥ ♦ ♥ qr♦ tr♠♦♥á♠♦ ② ♦trs ♣r♦♣s

r♦♥s ♦♥ ♠♦♦ ② ♣r♠♦♦ s s♣rs s♦r s q s s♦r♥

í♥tss ♥tr♦t♦r

♥ ♦s út♠♦s ñ♦s ♦ r♥♦ ♥trés t♥t♦ ♣♦r ♣rt ís ♦♠♦ qí♠ ♣♦r st♦

s ♣r♦♣s tr♠♦♥á♠s ② strtr ♠r♦só♣ ♦s s♦r♦s s♦r sstrt♦s só♦s

s ♣♥t♦ st tór♦ ♦s ♣r♦♠s ♥trs s s♦♥ ♥trí♥s♠♥t t♦s♦s ② q ♦♥t♥♥

♥sr♠♥t r♦♥s s♣s ♥ ♣r ♥s ② ♥♦♥s ♦rró♥ ♥sótr♦♣s

♥ st ss s tr♥s♦♥s s ♥ ♥trs s ② ♥ ♦s s♦r♦s s♦r ♣rs ♦ ♦♥♥♦s

♥ r♥rs s ♠♦s ♥st♦ t③♥♦ ♦r♠s♠♦ ♥♦♥ ♥s ♥tr♦♦ ♥ ♦s

♣ít♦s ♥tr♦rs

♦s sstrt♦s só♦s s♦r ♦s s s s♦r ♦ s♦♥ ♠♦♦s ♣♦r ♣rs s♣r♦sts strtr

q s♦♦ ♣♦rt♥ ♣r♦♠ ♥ tr♠♥♦ ♣♦t♥ ♥♦ ést ♥ ♥ó♥ st♥ ♣r♣♥r z

♥tr át♦♠♦ ♦ ♠♦é ♦ ② ♣♥♦ sstrt♦

♥ s ♦s út♠s és srr♦♦ ♥♦♥s s♦ ♥ ♠♣♦ ♠② t♦ ♥tr♦ ís

♠tr ♦♥♥s ♦tr♦♥ ss♦s r♥♠♥t♦s s♦r s ♣r♦①♠♦♥s ♠ás s♠♣s ♥♦♥

♥s ♥♦♥s ♥s ♥ s srs rs q ♣r♠tr♦♥ ♠♣♦rt♥ts ♥s ♥

♦♠♣r♥só♥ ② sr♣ó♥ ♦s ♣r♦s♦s s♦ró♥ ♦s s♦r só♦s st♦s ♦r♠ó♥ ♣s

♣r♦s♦s s♦ró♥ ♥ ♣♦r♦s str♦s ② ♥ ♥♥♦strtrs t

Pr ♦♥t♥r ♣♦♠♦s s♥tt③r s st♦♥s s♥s q s ♥ rt♦ ♥ ♣ít♦ ② ♠♥♦♥r ♥s

♦trs

Page 67: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦rr ♥t♦♥s q sr♣ó♥ ♦♠♣♦rt♠♥t♦ ♥ ♦ s♦r♦ ♥ ♥ ♣r q s r

s ♦♥s ♣r♦ r♥t♥❩r♥ ❩ ♣rs♥t ♥s ts r♦♥s ♦♥ á♦

♥♦ s ♣ st♦♥s ♥ ♦♥ s r③s ♥tr ♠♦és ♦ ♥②♥ t♥t♦ tér♠♥♦s trt♦s

♦♠♦ r♣s♦s ♦ ♥ s♦s ♦♥ ♣r ♥s s ♠② ♥♦♠♦é♥♦ ♦ r♥♦ ♥ ♣r ♦ ♦♥

♦ st ♠② ♦♥♥♦ ♦s ♥tr♦ ♣♦r♦s ♦ r♥rs strs ❬ ❪ ♥ st út♠ rr♥

s ♦♠♣r♥ rst♦s ♣r♦♥♥ts ♣r st t♣♦ ♣r♦①♠♦♥s ♦♥ ♦s ♦t♥♦s ♠♥t ♦s ♠ét♦♦s

♦♥t r♦

♥ ♥t♦ t♦rís ♦♠♦ ♠♦s ♥ r r♦♥t♦ ♦ ♦♠♥t♦ ♥ ♣ít♦ ♣r r♦rr q

①st♥ ás♠♥t s s♥ts ♣r♦①♠♦♥s

♣r♦①♠ó♥ ♦ ♥s ♥ s ♦♠t♥ s ♦rr♦♥s ♠♦rs ♦rt♦ r♥♦

s ♣r♦①♠♦♥s rátr ♥♦ ♦ ♦♠♦ ♣♦r ♠♣♦ ♥s s③ ♦ q ♦rrs♣♦♥

t♦rí s ♠s ♥♠♥ts

♥ ♣r♦①♠ó♥ srr♦ ♠♦s é ❬ ❪ s t♥ ♥ ♥t st t♣♦

♦rr♦♥s trr ♦♥ ♥ ♥s ♣r♦♠♦ ♣s ♦♥ ú♥ t♣♦ ♥ó♥ ♣r♦♣ tr ♦♥

ró♥ ♠♣qt♠♥t♦ r♦♥ ♦♥ t♠ñ♦ ♠♦r

♥ ♣r♦①♠ó♥ ♣r♦♣st ♣♦r ♦s♥ ♥ ❬❪ ♥r♥t r s♦♥ s ♠s ♥

♠♥ts ♦♠étrs s ♠♦és ♦ s r♦ s s♣r ② s ♦♠♥

♦s ♦r♠s♠♦s ② r♥ ♣r♠t♥ ♦rr ♣r♦♠s rt♠♥t ♥♦♠♦é♥♦s ♥tr♦

♥♦ s ♥tr♦♥s ♦rt♦ ♥ st ♠♥r ♦s sq♠s ♥♦ ♦s ♥ ♥t ♥tr ♦trs ♦ss

s ♦s♦♥s ♥ s á♠tr♦ ♠♦r ♣r ♥s q ♣r ♥ ♥ ♦ ♥♦ s

s♦r s♦r ♥ sstrt♦ só♦

♥ st♦s út♠♦s ñ♦s s ♥ ♣r♦♣st♦ ♦tr♦s r♥♠♥t♦s sts ♦r♠♦♥s ♦♥ ♦s q s ♦r♦ ♦rr

♦♥ st♥t é①t♦ ♣r♦♠s ♦①st♥ ss íq♦rst♥s ♥ ♦s srs rs ♦ ♥r♦s

rí♦s ♥ ♥ ♠♥só♥ s♦r♦s s♦r rt♦s sstrt♦s ♥ rr♥ ❬❪ r③♦♥ r③ ♥ r r♦♥t♦

t♠

P♦r ♦tr♦ ♦ ♥ tr♦ ♦t ❱s♥②♦ ② ♠r ❬❪ s ♣♦♥♥ r s♠ts ② r♥s

♥ s ♣r♦♥s q rr♦♥ s ♣r♦①♠♦♥s ② ♥♦ s♦♥ ♣s st♦ ♥ s♦ró♥

♦s s♦r s♣rs sós ♣♥s ♥ q ♦rrs♣♦♥ ❬❪ s ♥

♦♠♣ró♥ ♥tr ♦s rst♦s ♦t♥♦s ♠♥t ② ♥ s♠ó♥ ♦♥t r♦ ❬❪ ♣r

s♦ ♥ ♦ srs rs ♦♠♦ s ♣ ♣rr ♥ st r s r♥s ♦s r♦♥s ♦♥

♦r♠ ♣r s♦♥ ♠í♥♠s ♠ás ♦s t♦rs ❬❪ ♣r♦♥ rst♦s s♦ró♥ 2 s♦r

rt♦ sst♠ ②♦ ♣♦t♥ s♦ró♥ s ♠ás ♥t♥s♦ q ♦s t③♦s ♥ ♥str♦s á♦s ♥

t rr♥ s ♠str q ①st ♥ ♥ r♦ ♥tr ♦s ♣rs ♦t♥♦s ♣r s sst♠ ♦♥ ♦s rs♦s

♦r♠s♠♦s

♦s♦tr♦s trr♠♦s ♠②♦r♠♥t ♥tr♦ ♦r♠s♠♦ ♦♥ t♥t♦ ♦♠♣♦♥♥t ♣rsó♥ ♦♠♦

♣♦t♥ qí♠♦ s♦♦ srs rs s ♦rrs♣♦♥♥ ♣r♦♣st Prs❨ ❬❪

♦♥s rr♥

Page 68: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.5 1 1.5 2 2.5 30

5

10

15

z*

ρ*

−MC (Diamantes)−SDA (línea sólida)−FMT (línea de puntos)

r ♥s ♥ ♥ó♥ st♥ ♥ ♣r só ♣r ♥ ♦ srs rs ♦♥ ηbulk = ② T = 150 st rá♦ ♦rrs♣♦♥ ❬❪ ♣♦t♥ q r ♣r s♦r ♦ s ♥ ♦s♠♥ts ♦rrs♣♦♥♥ s♠♦♥s ♦♥t r♦ s ♦ ♣♦r ♦♦♦s ② sr ❬❪ s í♥ssós s♦♥ á♦s ♦s t③♥♦ ♦r♠s♠♦ ♥♦ ♦ ♥♦♥ ♥s ♥ ♣r♦①♠ó♥ í♥ ♣♥t♦s ♦rrs♣♦♥ á♦s r③♦s ♦♥ ♣r♦①♠ó♥

Pr ♦s ♣r♦♠s s♦ró♥ s♦r ♥ ♣r ♥r♦s ♥ st ss s♣♦♥r♠♦s q ♦s ♣rs ♥s

s♦♦ ♣♥♥ ♦♦r♥ z ♣r♣♥r sstrt♦ ❬ρ(r) ≡ ρ(z)❪ ♦ s q s♦♥ ♥r♥ts ♥ ♣♥♦ xy

♣r♦ sstrt♦ s♦r♠♦s s ♦♥s ❬♣ít♦ s ② ♥tr♦ ♥

tr♠♥♦ ♥♦ ♦♥ s ♦♥♦♥s ♦♥t♦r♥♦ ρ(z > L) = ρ(z → ∞) = ρB ♦♥ ρB s ♥s

qr♦ q ♣♦s ♦ ♣♦r r ♥tró♥ ♦♥ ♣r ♥ ①♣rs♦♥ Q ♣♦r

s ♥tr♦rá ♣♦t♥ Usf (z) ♦rrs♣♦♥♥t

sts ♦♥s s rs♥ ♥ ♦♥t①t♦ ♦r♠s♠♦ ♥ó♥♦ sí ♦♠♦ r♥ ♥ó♥♦ s s♦♦♥s

q s♦♥ sts ♦ ♠tsts ♣r s s dµdn > 0 q s ♦t♥♥ s♥♦ st♦s ♦s ♦r♠s♠♦s s♦♥ é♥ts

s♦ ♥ s♦s ①♣♦♥s ♥ ❬❪ ♣ ♥♦♥trrs ♥ ♥áss tór♦ r♦♥♦ ♦♥ s ♣r♦♥s

q s s♣r♥♥ ♠♦s ♦r♠s♠♦s í s ♠str q s♦♦ ♣r sst♠s ♠② ♦♥♥♦s ♦♥ ♥ ♣qñ♦

♥ú♠r♦ ♣rtís ♣♥ ①str r♥s s s tr ♦♥ ♥♦ ♦tr♦ sq♠

r r♥♦ st ♦ ♠tst r♥ s ♣♥t♦ st s s♦♦♥s ♦t♥s

r s♠♣♠♥t ♥ q ♦r♠s♠♦ r♥ ♥ó♥♦ ♥♦ ♣r♠t ♦t♥r s♦♦♥s ♥sts P♦r ♦tr ♣rt

s ♣♥t♦ st á♦ ♦st♦ ♦♠♣t♦♥ s ♠♥♦r ♥♦ s tr ♦♥ ♦r♠s♠♦ ♥ó♥♦

♦ q ♥ ♣s♦ tró♥ s♦ó♥ ♦t♥ ♥tr♦ st ♣r♦①♠ó♥ stá ♥♦r♠③ ②

q ♥ú♠r♦ ♣rtís ♣r♠♥ ♦♥st♥t

♥ts ♣rs♥tr ♥str♦s rst♦s ♦rrs♣♦♥♥ts s♦ró♥ r ② ❳ s♦r r♥ts sstrt♦s

srr♠♦s ♦s ♣♦t♥s sstrt♦♦ ♠ás t③♦s ② rs♠r♠♦s ♦s ♦♥♣t♦s ás♦s r♦♥♦s ♦♥

♠♦♦ s♣rs

P♦t♥s s♦ró♥

Page 69: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥ trtr ①st♥ r♦s ♣♦t♥s ♣r♦♣st♦s ♣r srr ♥tró♥ ♥ át♦♠♦ ♦ ♠♦é

♦ ♦♥ ♥ sstrt♦ ♦s ♠ás s♠♣s s♦♥ ② q s ♦t♥♥ s♣♦♥♥♦ q ♥ át♦♠♦ ♦ ♠♦é

♦ ♥trtú ♦♥ ♥ át♦♠♦ ♦ ♠♦é sstrt♦ ♠♥t ♥ ♣♦t♥ sótr♦♣♦

V paressf (r) = 4 εsf

[

(σsfr

)12

−(σsfr

)6]

.

qí sí♥ s rr♥ sstrt♦ ② f ♦ εsf r♣rs♥t ♠ó♦ ♦r ♠á①♠♦

♥tró♥ ♥tr ♥ át♦♠♦ ♦ ♦♥ ♦tr♦ sstrt♦ ② σsf s r♥♦ s ♥tró♥

♥t♦ εsf ♦♠♦ σsf r♥ ♥♦♠r ♣rá♠tr♦s r ② ♥ ♣r♠r ♣r♦①♠ó♥ s ♣♥ r

s♥♦ s rs ♦r♥t③rt♦t

εsf = (εff εss)1/2

,

σsf =σff + σss

2.

t♦ t♦t s tr♠♥ ♥tr♥♦ s♦r t♦t ♦s át♦♠♦s ♦ ♠♦és ♣rtís sstrt♦

♠é♥ ② ♣♦t♥s ♠ás ♦r♦s ♣♦r ♠♣♦ ♦s srr♦♦s ♣rtr ♣r♠r♦s ♣r♥♣♦s ♦

r♦ ss sr♠♦s st♥t♦s t♣♦s ♣♦t♥ ♣♥♥♦ sstrt♦ ♦♥t♥ó♥ ♣r♦r♠♦s

srr♦s ♦♥ ú♥ t

P♦t♥

st ♣♦t♥ s ♠ás s♠♣ r ♣♦r ♠♣♦ ❬❪ ② s ♦t♥ s♣♦♥♥♦ q sstrt♦ s ♥ ♦♥t♥♦

tr♠♥s♦♥ ♦♥ ♥ stró♥ ♥♦r♠ át♦♠♦s ♦ ♠♦és ② ♥s s ρs st♥

♣r♣♥r ♥ ♣rtí ♣♥♦ sstrt♦ s z ♥trr ♣♦t♥ V paressf (r) ♦ sts ♦♥♦♥s

s ♦t♥

Usf (z) =

2π3 εeff

[

215

(σsf

z

)9 −(σsf

z

)3]

si z > 0

0 si z ≤ 0,

♦♥

εeff = εsfρsσ3sf .

st ♣♦t♥ ♦ sr♠♦s ♣r str s♦ró♥ r s♦r ♥ sstrt♦ 2 ♦♥ s ♥ sr♠♦s ♦s

♦rs ♦s ♣rá♠tr♦s sr♦s ♣♦r ♥r ② ♠ ❬ ❪

♥ trtr ♣♦t♥ ♦ ♣♦r t♠é♥ ♣r srt♦ ♣r z > 0 ♥ ♠♥r tr♥t

❬❪

Usf (z) =4C3

3

27W 2sf

(

1

z

)9

− C3

(

1

z

)3

,

Page 70: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦♥ Wsf s ♣r♦♥ ♣♦③♦ ♣♦t♥ ② C3 s ♠rs ♣rá♠tr♦ ♥ r ❲s ♠♦s

♠♥♦♥r q ❩r♠ ② ♦♥ ❬❪ r♦♥ ♦rs Wsf ② C3 ♠♦r♥♦ s♠♣ ♣r♦①♠ó♥ ♦r♥t③

rt♦t

P♦t♥

♥ r ♦♥srr q sstrt♦ s ♥ ♦♥t♥♦ ♥ s ♣ s♣♦♥r q stá ♦♠♣st♦ ♣♦r ♥ ssó♥

♣♥♦s ♣r♦s ♥♦r♠s t ❬❪ st♥ ♣r♣♥r ♥ ♣rtí ♦ ♥ ♣♥♦

sstrt♦ s z ♣r♦s♦ ♥tró♥ V paressf (r) s♦r s ♣♥♦

Usf (z) = 4π εsf ρs σ2sf

[

1

5

(σsfz

)10

− 1

2

(σsfz

)4]

,

♦♥ ρs s ♥s s♣r ♣rtís sstrt♦ st ♣♦t♥ s ♦r♠

sstrt♦ ♥♦ s s♦♠♥t ♥ ♠♦♥♦♣ só s♥♦ q stá ♦♥stt♦ ♣♦r r♦s ♣♥♦s ② q s♠r s♦r

t♦♦s ♦s ♦t♥é♥♦s

Usf (z) = 4π εsf ρs σ2sf

np∑

j=0

[

1

5

(

σsfz + jd

)10

− 1

2

(

σsfz + jd

)4]

,

♦♥ d s st♥ ♥tr ♦s ♣♥♦s sstrt♦ ② np ♥t ♦s ♣♥♦s st ♣♦t♥ s ♦

♥♦♠♥ ♣♦r s♠♠ ♥ ❬❪ ♣♦♠♦s r st ♣♦t♥ srt♦ s♥t

♠♥r

Usf (z) = ε1s

3∑

j=0

[

2

3

(

σsfz + jd

)10

− 5

3

(

σsfz + jd

)4]

,

s♥♦ ♣r♦♥ st ♣♦t♥ Wsf/kB ≃ ε1s/kB

P♦t♥ ❩

♦♥ ♣♦str♦r tr♦ ❩r♠ ② ♦♥ ❬❪ r♦s t♦rs ♠♦rr♦♥ trt♠♥t♦ t♦

♥ tró♥ sstrt♦ ♦ r♦ st í♥ ③♠s② ♦ ② ❩r♠ ❬❪ srr♦r♦♥ s ♣r♠r♦s

♣r♥♣♦s ♥ ♣♦t♥ ♥tró♥ sstrt♦♦ ② ①♣rsó♥ s

Usf (z) = V0 (1 + αz) e−αz − f [(z − zvdW )β(z − zvdW )]CvdW

(z − zvdW )3,

♦♥

f(x) = 1− e−x(1 + x+x2

2) ,

Page 71: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦ ❱♦rs ♦s ♣rá♠tr♦s ♦rrs♣♦♥♥ts ♣♦t♥ ❩ ♣r r ② ❳ ♥ ♥tró♥ ♦♥ sstrt♦s ♥♦st♦♠♦s rt♠♥t r♦ ❬❪ V0❱ α−1

0 0 = CvdW ❱30 ② zvdW 0

V0 α CvdW zvdW

s

r V0 α CvdW zvdW

s

❳ V0 α CvdW zvdW

s

β(z) =α2z

(1 + αz).

♦s ♦rs ♦s ♣rá♠tr♦s V0 α CvdW ② zvdW ♣♥♥ t♥t♦ ♦ ♦♠♦ sstrt♦ ♣r♠r tér♠♥♦

st ①♣rsó♥ st r♦♥♦ ♦♥ tér♠♥♦ r♣s♦ rtr♦ ② r♠♣③ ♦♥tró♥ ♣r♦♣♦r♦♥

1/z9 s♥♦ tér♠♥♦ ♦♥stt② ♦♠♣♦♥♥t trt ♥ r ❲s q ♣r z >> zvdW

t♥ −C3/z3 ♥ó♥ ♠♦rt♠♥t♦ f(x) ♥t s♦♣♠♥t♦ s ♥♦♥s

♦♥ ♦rrs♣♦♥♥ts ♦s át♦♠♦s sstrt♦ ♥ó♥ β(z) ♦rr ♣r♦♠ r♥ q st

♣♦t♥ ♣♦s ♥ z = zvdW ② q ♥♦ s ♦rrs♣♦♥ ♦♥ ♥♥ú♥ ♦ ís♦ ❬❪

st ♣♦t♥ ❩ ♦ ♠♦s t③r ♣r ♠②♦rí ♦s sst♠s q ♥str♠♦s ♥ r♦ s

♠str♥ ♦s ♦rs q t♦♠♥ ♦s st♥t♦s ♣rá♠tr♦s ♦rrs♣♦♥♥ts ♦s ♠♥t♦s ♥③♦s ♥ st tr♦

♦♦ ② í♥ ♣r♠♦♦

♥③♠♦s ♥s st♦♥s rr♥ts s tr♥s♦♥s ♠♦♦ ② ♣r♠♦♦ ♣r sst♠s íq♦♣♦r

s♦r♦s s♦r s♣rs

♦♥srr s♦ró♥ ♥ sstrt♦s ♣♥♦s ♣r♥ ♥ó♠♥♦s ts ♦♠♦ ♠♦♦ tt♥ ② ♣r♠♦♦ ♣r

tt♥ ♣r str st♦s ♥ó♠♥♦s s ♥sr♦ ♦♥srr ♥ ♣r♦♠ s♦ró♥ ♥ ♠ás ♥ ♠♥só♥

s tr♥s♦♥s tt♥ r♦♥ sts ♣♦r ♣r♠r ③ ♥ ♥ ♦s tr♦s ♥♣♥♥ts ♥ ❬❪

② ♥r ② ♠ ❬❪ ♥ st só♥ ♠♦s ♦♠♥tr ♥♦s ♦s s♣t♦s ♠ás r♥ts ♥ trtr

s ♣♥ ♥♦♥trr ts rs♦♥s tórs s♦r t♠ ♦♠♦ ♣♦r ♠♣♦ ♥♥s ❬❪

s ♣r♦♣s ♠♦♦ ♥ s♣r ♣♥♥ ás♠♥t t♠♣rtr ② ♦♥t ♥tr

Page 72: Adsorción de fluidos sobre sustratos sólidos, estudiada

♠á①♠ ♥t♥s ♥tró♥ q ①st ♥tr sstrt♦ ② ♦ Wsf ② ♠á①♠ ♥t♥s

r③s ♥tr ♠♦és ♠s♠♦ ♦ εff

W ∗

sf =Wsf

εff.

①st♥ ♠tt sst♠s q ①♥ tr♥s♦♥s ♠♦♦ ♦s ♠♦s ②r ♥♦ ♠② s♥♦ ♣r

r s rtrísts ♥rs trt ♥ sst♠ ♦♥stt♦ ♣♦r ♥ ♦ ♥ ♦♥tt♦ ♦♥ ♥ s♣r

❯♥ sq♠ st stó♥ stá r♣rs♥t♦ ♥ ♥ st s♦ r♣rs♥t s íq ② ❱

s ♣♦r

í s r♦♥ s t♥s♦♥s s♣rs sstrt♦íq♦ γsl sstrt♦♣♦r γsv ② íq♦♣♦r γlv ♥

qr♦ ♦rrr q

γsv = γsl + γlv cosθ ,

♦♥ θ s ♦ ♥♦♠♥ s♠♥t á♥♦ ♦♥tt♦ st ①♣rsó♥ s ♦♥♦ ♦♥ ♥♦♠r ó♥

❨♦♥ ② tr♠♥ st♦ ♥ sst♠ ♥♦ θ = 0 s r ♥ ♥ stó♥ ♠♦♦ ♦♠♣t♦ s

t♥ q

γsv = γsl + γlv

② stó♥ ♥rét♠♥t ♠ás ♦r s ♥tr♣♦♥r ♥ ♣ ♠r♦só♣ íq♦ ♥tr sstrt♦ ②

s ♣♦r ♥t♦♥s q ①st ♠♦♦ t♦t ♦ ♦♠♣t♦ ♦ s♠♣♠♥t ♠♦♦ ♥ ♦ ♦♣st♦ s

t♥ θ = π ♦♥ó♥ ♥♦ ♠♦♦ s ♥ s t♠é♥ ♦♠ú♥ rrrs é ♦♠♦ tt♥ ♦♠♣t♦ ♣♦r s

♣♦r ② ♣♦r ♦ t♥t♦

γsl = γsv + γlv

♥ st s♦ ♥ ♣ ♠r♦só♣ ♣♦r r ♥tr sstrt♦ ② íq♦ rst♦ st♦s ♥tr♠♦s

♦♥ 0 < θ < π ♦rrs♣♦♥♥ st♦♥s ♠♦♦ ♣r ♥ st♦s st♦s ♣ s♦r s♦r

s♣r t♥ ♥ s♣s♦r ♠r♦só♣♦ s ♣ srr ♦♠♦

|γsv − γsl| ≤ γlv

♠♦♦ ♦♠♣t♦ s ♥③ ♥♦ s r ①♣rs st ♠♦♦ ♥♦s ♥ s

♦♥♦♥s ♥srs ♣r q s é ♥ tr♥só♥ ♠♦♦ s r ♣s♦ ♥ stó♥ ♠♦♦ ♣r

♦♠♣t♦ ♣♦♥♠♦s q ♥♦s st♠♦s s♦r í♥ ♦①st♥ íq♦♣♦r ② r♠♦s t♠♣rtr

rá♥♦♥♦s ♣♥t♦ rít♦ st♦ q γlv s ③ ♠ás ♣qñ ② t♥ r♦ ♦♠♦

γlv ∼(

Tc − T

T

)

−α

♦♥ ①♣rsó♥ ♣ré♥tss ♦rrs♣♦♥ t♠♣rtr r ② α ①♣♦♥♥t rít♦

♥ r♠♥tó q γsv − γsl t♥í r♦ ♦♠♦ r♥ ♥ ♥ss s ss íq ② ♣♦r

γsv − γsl = [ρv − ρl]

(

Tc − T

T

Page 73: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♥ r s ♦sr♥ s trs st♦♥s q s ♣♥ ♠♥str ♥♦ ♥ íq♦ stá ♥ ♦♥tt♦ ♦♥ ♥s♣r s trs ❱ ② ♥t♥ s ss só ♣♦r ② íq rs♣t♠♥t ② θ r♣rs♥t á♥♦ ♦♥tt♦ ♥ ♦ ♣rt s♣r♦r ③qr íq♦ s ①♣♥ r♥♦ t♦ s♣r ♦r♠♥♦♥ ♣ s♣s♦r ♥♥♦ q ♣♥ ♥t íq♦ s♣♦♥ ♥ st s♦ s q íq♦♠♦ ♦♠♣t♠♥t s♣r ♥ ♦tr♦ ①tr♠♦ ♦ s♣r♦r r♦ s ♥tr♣♦♥ ♥ ♣ ♣♦r ♥tr s♣r ② íq♦ st ♠♥r íq♦ ♥♦ ♥tr ♥ ♦♥tt♦ ♦♥ só♦ q ♦♥stt② s♣r st ♦ s ♦ ♦♥♦ ♦♥ ♥♦♠r s♦ ♦♠♣t♦ r②♥ stó♥ ♥tr♠ sq♠t③ ♥ ♣rt ♥r♦r r ♥♦♠r ♠♦♦ ♣r ♥ s ♠s♠♦ ♦ s ♥ sq♠t③♦ s r③s q sr♥ ♥tr só♦ íq♦ ② ♣♦r γsl r♣rs♥t r③ q só♦ r s♦r íq♦ γsv s r③ q só♦ r s♦r ♣♦r ② γlv q íq♦ r s♦r ♣♦r

Page 74: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♠♦s ♥ ♣♦t♥ qí♠♦ t♦r r♠♥t♦ ② t♥só♥ s♣r ♦rrs♣♦♥♥ts tr♥s♦♥s ♠♦♦ ♣r♠r ② s♥♦ ♦r♥ ♦ ♠♦♦ ♦♥t♥♦ ♥ r♦ s♣r♦r ♣♦♠♦s ♦srr ♦♠♦ ♠♥sts rs ♣r ♥ tr♥só♥ s♥♦ ♦r♥ ② ♥ ♥r♦r rs♣t♦ ♠♦ ♣r ♥ tr♥só♥ ♠♦♦ ♣r♠r ♦r♥ r t①t♦

♦♥ ρv ② ρl s♦♥ s ♥ss ♣♦r ② íq♦ rs♣t♠♥t ② ♦♥ ♠ás β < α st ♠♥r

s♥t♠♥t r ♣♥t♦ rít♦ s ♠♣r q γsv −γsl = γlv ② ♣♦r ♦ t♥t♦ t♥ r ♥ tr♥só♥

♠♦♦ ♥q r③♦♥♠♥t♦ s ♥ ♣rt rró♥♦ ♣s r♥ ♥tr s t♥s♦♥s s♣rs t♥

r♦ ♦r♠ ♠ás ♦♠♣ ♦ q s♥t♠♥t r ♥ ♣♥t♦ rít♦ t♥ r ♥ tr♥só♥

♠♦♦ s ♥ ♦♥só♥ só

♥♦ r③ sstrt♦ s ♠♦r ♦♠♣r ♦♥ ♥t♥s ♥tró♥ s ♠♦és

♦ ①strá ♥ tr♥só♥ ♠♦♦ ♣r♠r ♦r♥ ♣r t♠♣rtrs ♥r♦rs rít

♥ ♥r s tr♥s♦♥s ♠♦♦ s♦♥ ♣r♠r ♦r♥ ♣r♦ t♠é♥ s ♥ó♠♥♦s ♠♦♦ ♦♥t♥♦ ♦

tr♥só♥ ♠♦♦ s♥♦ ♦r♥

❱r♥♦ ♣♦t♥ ♥tró♥ ♥tr ♦ ② sstrt♦ s ♣♦s ♦t♥r ♦s ♦s ♦♠♣♦rt♠♥t♦s ♥

♠♦s s rtrísts ♠s tr♥s♦♥s ♦s rá♦s s♣r♦rs ♦rrs♣♦♥♥ ♥ ♣♦tét

stó♥ ♠♦♦ ♦♥t♥♦ ② ♦s ♥r♦rs ♥ tr♥só♥ ♠♦♦ ♣r♠r ♦r♥

♥ ② ♠♦s r♠ ss ♥ ♣♥♦ ♣♦t♥ qí♠♦t♠♣rtr qí µ0 s ♣♦t♥

qí♠♦ ♦①st♥ íq♦♣♦r ♦rrs♣♦♥♥t ♥ íq♦ q ♥♦ st s♦♠t♦ ♥♥ú♥ ♣♦t♥

①tr♥♦ ♥ts r t♠♣rtr rít Tc s ♣r♦ tr♥só♥ ♠♦♦ Tw tr♥só♥ s

♣r♠r ♦r♥ ② s♦ ♥ í♥ ♣r♠♦♦ r ♦①st♥ q rr♥ t♥♥♠♥t ♥ Tw② ♥③ ♥ ♥ ♣♥t♦ rít♦ rátr ♠♥s♦♥ ❯♥ ♣rá♠tr♦ q ♣ rstr ♠② út ♣r str

sts tr♥s♦♥s s r♠♥t♦ Γℓ ♥ó♥ ♠ás ♣r♦♣ ♣♥ sst♠ ♥ ♥str♦ ♠♣♦

s q r s íq ② ♣♦♠♦s ♥r♦ ♦♠♦

Page 75: Adsorción de fluidos sobre sustratos sólidos, estudiada

Γℓ =

ˆ

[ρ(z)− ρv] dz

st ♥tr s ①t♥ s♦r t♦♦ s♠s♣♦ ♦♣♦ ♣♦r ♦ ♠♥tr ♥ú♠r♦ ♣rtís

t♠♣rtr ♠♦♦ Tw s ♣r♦ ♠②♦r st♦ ♥ ♦r r♠♥t♦ q tr♠♥ s♣s♦r

♣í s♦r ♣sá♥♦s ♥ ♣í ♣♦♦ s♣s♦r ♥ ♠②♦r s♣s♦r st s♦♥t♥

♥ r♠♥t♦ ♣rr r♥t t♦♦ ♥♦♠♥♦ r♠♥ ♣r♠♦♦ q s ①t♥ ♥tr Tw ②

t♠♣rtr rít ♣r♠♦♦ Tcpw P♦r ♥♠ st út♠ t♠♣rtr ♥ ♥r♠♥t♦ ♥ ♥ú♠r♦

♣rtís q r♠♥t♦ r③ ♦♥ ♦♥t♥ r s s ❬ ❪

sí ♥ s♦ ♥ tr♥só♥ ♣r♠r ♦r♥ s♦ró♥ ♣rs♥t ♥ s♦♥t♥ ♥♦ trs♠♦s

r♠♥ ♣r♠♦♦ ② r ♥ ♦①st♥ ♦♠♦ ♣ ♦srrs ♥ ♣♦♥♠♦s ♦r

q ér♠♦s ♣s str t♥só♥ s♣r ♥ ♥ó♥ s♣s♦r ♣ íq♦ s♦r

strt♠♥t st♦ ♥♦ s ♣♦s ♣s s ♥s ♦♥♦♥s tr♠♦♥á♠s ①st ♥ s♣s♦r q ♠♥♠③

t♥só♥ s♣r s♥♦ ♥sts rst♦ ♦s st♦s ♦ ♦st♥t s♣s♦r ♣ íq♦ s♦r

s ♥ r ♠② ♥t s♥♦ ♥ ♣rát t r ♥ st♦ st t♣♦ ♦♥ t♦rí ♥♦♥

♥s r ❬❪ ♥ ♠♦s ♦♠♣♦rt♠♥t♦ r♠♥t♦ ♥ s♦ ♠♦♦

♦♥t♥♦ sú♥ ♠♥t♠♦s ♣♦t♥ qí♠♦ s tr②t♦rs ♠rs ♣♦r s ♥ Pr T < Tw

í♥ ♦♥t♥ s♦ró♥ r ② s ♠♥t♥ ♥t ♥ ♦①st♥ íq♦♣♦r Pr T > Tw í♥

s♦♥t♥ ♣ s♦r r ♦r♠ ♦♥t♥ ② r ♥♦ s ♥③ ♦①st♥ st r♥

s ♦rít♠ ♣r ♣♦t♥s ♦rt♦ ♥ ♥♠♦s ♦r t♥só♥ s♣r ♥♦s st♠♦s s♦r

í♥ ♦①st♥ íq♦♣♦r ♥ s♦ ♠♦♦ ♦♥t♥♦ rí♠♦s ♦ ♣r♦ ♣r T < Tw

í♥ ♦♥t♥ ② ♥ ♠í♥♠♦ ♣r ♥ ♦r ♥t♦ Γℓ q s s♣③ r sú♥ ♠♥t♠♦s

t♠♣rtr st q ♥♠♥t r ♣r ♦rs T ≥ Tw í♥ s♦♥t♥ P♦r ♦♥trr♦ s

tr♥só♥ s ♣r♠r ♦r♥ t♥só♥ s♣r ♣rs♥t ♦s ♠í♥♠♦s óts q ♥ ①st♥ ♦s

♠í♥♠♦s s♦t♦s ♣r Tw ♥♦ ♣r ♦rs ♥t♦s Γℓ ② ♦tr♦ ♣r Γℓ → ∞

♣ rr ♥ ó♥ q ♣r♠t tr♠♥r ♦r Tw r ♣♦r ♠♣♦ ❬❪ ♣rt

s♥tót ♣♦t♥ s♦ró♥ tér♠♥♦ ♦ ♦♥ ♦♠♣♦♥♥t trt st ♣♦t♥ t♥ ♦r♠

♣♦t♥ t♣♦ ♥ r ❲s s r s

Usf (z) ∼ − C3

z3,

♠♥t r♠♥t♦s tr♠♦♥á♠♦s s

∆µpw(T ) = apw(T − Tw)3/2 .

♥ st ①♣rsó♥ ∆µpw s ♣♦t♥ qí♠♦ r♦ s r q ② rr♥ s ♦①st♥

íq♦♣♦r ♥ ♦ ♥ qr♦ tr♠♦♥á♠♦ s♥ ♥tr♦♥s ①tr♥s ♥t st ①♣rsó♥ s

♣ tr③r í♥ ♣r♠♦♦ q ♠♦r st ♦s ♦rs ∆µpw − T ② ♦t♥r ♦r Tw

♠ q ♠♥t ♥t♥s rt ♣♦t♥ trt♦ sstrt♦ Tw s r♥♦ ♣♥t♦

tr♣ ♣♥♦ ①str ♦ q s ♦♥♦ ♦♠♦ ♠♦♦ ♣♥t♦ tr♣ Tw = Tt

s tr♥s♦♥s ♣r♠r ♦r♥ ♥ s♦ ♦srs ♣r r♦s ♦s s♦r♦s ② ①st ♥ ♥♥t ♥t

♠♦♥s ①♣r♠♥ts r♦♥s ♦♥ st ♥ó♠♥♦ ❯♥ ♠♣♦ ♦ ♦♥stt② s♦ 4 s♦r♦

s♦r rt♦s sstrt♦s só♦s r ♣♦r ♠♣♦ ❬❪

P♦r ♦tr♦ ♦ s ♦srr♦♥ tr♥s♦♥s ♣r♠♦♦ ♣r ró♥♦ ♠♦r 2 ♥♦ s s♦rí s♦r

② s ❬ ❪

Page 76: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦ró♥ s♦r ② s st ♥tr ♦tr♦s ♣♦r ss t♥ ② ♥ ❬❪ Pr st♦s

t♦rs ♥♥tr♥ ♠♦♦ ♥♦♠♣t♦ ♣r t♠♣rtrs ♠♥♦rs Tc = ② ♠♦♦ ♦♠♣t♦ ♣r

t♠♣rtrs s♣r♦rs ♥ s♦ s ♥♦ s ♦t♦ ♦♥ó♥ ♠♦♦ ♣r ♥♥♥ t♠♣rtr

♥tr♦ ♥tr tr♣ ② rít

♠♦♦ ♣♥t♦ tr♣ stá ♥st♦ ①♣r♠♥t♠♥t ♥ ♦s s♦s s♦ró♥ r ② ❳ s♦r

❬ ❪

♦s st♦s ♠r♦só♣♦s s r③r♦♥ ♠♥t ② s♠♦♥s ♦♠♣t♦♥s q t③♥ ♦♥t r♦ ②

♥á♠ ♦r ♥ s s ❬ ❪ ♣♥ ♥♦♥trrs st♦s r♦♥♦s ♦♥ s ♣r♦♥s

q s ♦tr♦♥ ♠♥t st♦s ♠ét♦♦s á♦

sr♥♦ strtr ♦♥♥t♦ s♦tr♠s s♦ró♥ ♣♦♠♦s ♥rr ♥s st♦♥s r♦♥s

♦♥ ♦s ♥ó♠♥♦s ♠♦♦ ② ♣r♠♦♦

❯♥ tr♥só♥ ♣r♠♦♦ s ♠♥st ♥♦ strtr s♦tr♠s s t q s ♣s ♥ s♦tr♠

q ♣rs♥t ♥ ♦♦♣ ♥ r ❲s ♥ q ♥♦ ♦ ♣♦s ♥ st s♦ t♠♣rtr ♦rr st

tr♥só♥ ♦rrs♣♦♥ t♠♣rtr rít ♣r♠♦♦ Tcpw í♥ ♣r♠♦♦ s r q ♥

♦s ♣♥t♦s ♥ ♥ r♠ s ∆µpw−T q s ①t♥ s Tw st Tcpw ❯♥ ♣♥t♦ s♦r st r t♥

♦♠♦ ♦♦r♥s ♣♦t♥ qí♠♦ q ♥ ♦♥stró♥ ① ② t♠♣rtr s♦tr♠

♦rrs♣♦♥♥t st ♠♥r strtr ♦♥♥t♦ s♦tr♠s r ♣rs♥ ♥ tr♥só♥

♣r♠♦♦ ② ♣r♠t r Tw ② t♠é♥ Tcpw

♥♦ r③ sstrt♦ s ♠♦r ♦♠♣r ♦♥ ♥t♥s ♥tró♥ s ♠♦és

♦ ①strá ♥ tr♥só♥ ♠♦♦ tt♥ ♣r♠r ♦r♥ ♣r t♠♣rtrs ♥r♦rs rít

t♠♣rtr ♠♦♦ Tw ♥ ♣í ♦ s♦r♦ ♦①st ♦♥ ♥ ♣í rs ♠s♠♦

❯♥ tr♥só♥ ♣r♠♦♦ ♣rtt♥ st rtr③ ♣♦r s♥ s♦♥t♥ ♥ ♦r t♦r

r♠♥t♦ ❬❪ ♥ s♥t♦ q t♠♣rtr ♠♦♦ s ♣r♦ ♠②♦r st♦ ♥ ♦r t♦r

r♠♥t♦ ② st s♦♥t♥ s♣r t♠♣rtr rít ♣r♠♦♦ ❬❪ Pr t♠♣rtrs

♠②♦rs Tcpw s♣s♦r ♣í s♦r r ♦♥t♥♠♥t

♦♦ s♠♣ ♣r tr♥só♥ ♠♦♦

P♦r ♦tr♦ ♦ ♥tr♦ ♥♦♠♥♦ ♦♦ ♠♣ ❬❪ s ♣ str ♥ ró♥ ♥tr ♠♦♦

♥ s♣r só ② s t♥s♦♥s s♣rs ♥ s ♥trss só♦íq♦ ② íq♦♣♦r r♦ ♦♥

❬❪ ♦♥ó♥ ♠♦♦ ♣ sr srt ♦♠♦ ♥ ♦♥ó♥ s♦r ♥tr ♣♦t♥

s♦ró♥ Iu

Iu = −ˆ

zmin

Usf (z)dz ≥2γlv(T )

[ρl(T )− ρv(T )]=Wγρ(T ) .

s♣♦♥ q ♦♥ó♥ ♠♦♦ r ♥ s ♣ s♦ ♦s s♠♣s s♦r♦s s♦r

sstrt♦s trt♦s s♠s② ♦ ② ❩r♠ r♦♥ Iu ♥tr♥♦ s ♣r♦♣♦ ♣♦t♥ s♦ró♥

❩ ♦♥t♥ó♥ tr♠♥r♦♥ Tw ♥♦ Wγρ(T ) ♦♥ ♦rs ①♣r♠♥ts γlv(T ) ρl(T ) ② ρv(T )

♥②r♦♥ ♦s rst♦s ♣r Tw ♥ r♦ ❬❪

♦♠♦ ♠♣♦ ♦s ♦rs Iu ♣r ♦s ♣r r♥ts sstrt♦s stá♥ st♦s ♥ r♦ ②

♠r♦s ♦♥ í♥s ♦r③♦♥ts ♥ ♥ st r t♠é♥ stá♥ ♥♦s ♦s ♦rs Wγρ(T )

Page 77: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦ ❱♦rs ♦s ♦♥ts Iu ♥ ♥s ❬ ♥♠❪ ♣r ♥♦s ♠ts ♥♦s ② ♣r ❬❪ st ♦♥ts ♥tr♥♦ ♣♦t♥ ❩

s

20 25 30 35 40 450

5

10

15

20

25

T [K]

Wγρ

e

Iu

[Knm

] Ne T

t

Tc

Mg

Li

Na

K

Cs, Rb

r ❱♦rs Wγρ Iu ♥ ♥ó♥ t♠♣rtr ♣r s♦r♦ s♦r rs♦s sstrt♦s rtr ③②s③ ②❯rrt ❬❪ sts rs s♦♥ ♥srs ♣r ♥③r s ♣r♦♣s ♠♦♦ ♥ ♦♥t①t♦ ♥♦♠♥♦♦♦ ♠♣ s í♥s ♦r③♦♥ts ♦rrs♣♦♥♥ ♥tr Iu ♦s ír♦s s♦♥ Wγρ s t♠♣rtrs tr♣② rít s ♥♥ ♦♥ Tt ② Tc rs♣t♠♥t

♥ s r s ♣ ♦rr♦♦rr q ♦♥ ♦s ♦rs Tw ♣♦s ♣♦r s♠s② ♦

② ❩r♠ ❬❪ ♣r st♥t ♥ Tw ♣r ② q s♦♥ ♦rs ♦s ♥ ③♦♥ ♥tr

♥tr♦ Tt ↔ Tc ♣r♦ ss rst♦s ♣r ② ♠str♥ sr♣♥s ♦♥ ♦s t♦s ①♣r♠♥ts

Pr s♦r♦ s♦r t♠♣rtr ♠♦♦ ♦t♥ ♦♥ Tw = 38 s s♥t♠♥t

♠ás q ①♣r♠♥t Tw =

sí ♦♠♦ stá ♦r♠♦ tér♠♥♦ Wγρ(T ) ♥r ♥ ♣r♦♠ ♥ s ❬ ❪ r♠♦s ♦♠♣♦rt♠♥t♦

s♥tót♦ Wγρ(T ) ♣r T r♥s Tc ♥♥♦ ♥ ♥t ①♣rsó♥ ♣r t♥só♥ s♣r íq♦♣♦r

♣♦r

γlv(T ) ≃ γ0lv (1− T/Tc)5/4

,

② ①♣rsó♥ ♥♠ ♣r r♥ ♥ss íq♦ ② ♣♦r ♥ ♦①st♥ ❬

❬❪❪

Page 78: Adsorción de fluidos sobre sustratos sólidos, estudiada

ρl(T )− ρv(T ) ≃2

7ρc (1− T/Tc)

1/3,

♦♥ ρc s ♥s ♦ Tc s ♣ r Wγρ(T ) ② rsrr ♦♥ó♥ ♠♦♦ ①♣rsá♥♦

♦♠♦

Iu = −ˆ

zmin

Usf (z)dz ≥Wγρ(T ) ≃4γ0lv7ρc

(

1− T

Tc

)11/12

.

♦♠♦ Wγρ(T → Tc) → 0 ♣♦r ♠ás é q s tró♥ ♥ sstrt♦ s♦r ♥ ♦ ♥tr Iu srá

♣♦st ♥♥♦ q ♦ s♠♣r ♠♦r sstrt♦ ♣r ♥ T < Tc ♥ ♠r♦ st ♣ró♥ ♥♦ s

♦rrt ♣és s ♦sró q ♣r ♥tr♦♥s sstrt♦♦ és ② ♦s q ♥♦ ♠♦♥ sstrt♦ ♥ ú♥

t♠♣rtr rít st s s♦ ♥♦ s s♦r s♦r s ❬❪

tr ♥ st ♠♦♦ ♣r ♥ s♦ s♦r♦ s♦r q ♣rs♥t ♥ Tw r♥ Tt

t③rs ♣r♦①♠ó♥

−ˆ

zmin

ρ(z)Usf (z)dz ≃ − ρl

ˆ

zmin

Usf (z)dz ,

s ♣r ♥ ♣rt ♠♣♦rt♥t ♦♥tró♥ q ♦rrs♣♦♥ ♠á①♠♦ ♣r ♥s ♦ ♦rr

st♦ ♥ ♠í♥♠♦ ♣♦t♥ s♦ró♥ ♥só♥ st t♦ tr ♦♠♦ ♦♥s♥ ♥ s♥s♦ ♥

♦r ♦t♥♦ ♣r Tw

P♦r ♦ ①♣st♦ ♥ st só♥ ♣♦♠♦s r♠r q s s♦♦ ♥ ♣r♦①♠ó♥ r ♣r♦♠ ♠♦♦

st♦s ♣r♦♣♦s s♦r s♦ró♥

♥ st só♥ srr♠♦s s♦ró♥ r ② ❳ s♦r rs♦s sstrt♦s ♥ ♦s s♦s ② r ♣rs♥

tr♠♦s rst♦s ♦t♥♦s ♥ ♠r♦ ♥s♠ ♥ó♥♦ ♥ ♠♦ ♣r ❳ ♣rs♥tr♠♦s rst♦s

♣r♦st♦s ♣♦r ♠♦s ♥s♠s ♥ó♥♦ ② r♥ ♥ó♥♦

Pr♠íts♥♦s ♥t③r q ♥str ♣r♦♣st ♣r ♣r♠t ♣rr ♥ó♠♥♦s r♦♥♦s ♦♥ ♠♦♦

s♣rs ♥ t♦♦ r♥♦ t♠♣rtrs ♥tr tr♣ Tt ② rít Tc ♦ s♦r♦ ñ♥♦

s ③ q q ♥♦r ♦r♠s♠♦ r ② ♦s♥r ❬❪ ② ♦s ♣♦t♥s ♣rs q sr♥

♥♦tt♦ ② ♦♦r♦rs ❬ ❪ ♥ r♥♦ t♠♣rtrs r♥♦ Tt st ♥♦♥♥♥t ② s ♠♦stró

①♠♥r γlv(T ) ♣r ♥ ♣ít♦

s♦ró♥ ó♥ ♥s♠ ♥ó♥♦

♥ rá♦ ③qr s ♠str ♣♦t♥ ❩ ♦rrs♣♦♥♥t ♥tró♥ ♦♥

trs ♠ts ♥♦s ② ♥ rá♦ r st ♠s♠ r s ♥ r♦ ♥ ♥ s ♠ás

Page 79: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.1 0 0.1 0.2 0.3−100

−80

−60

−40

−20

0

z−zmin

[nm]

Usf/k

B [K

]

Rb

Na

Li

Mg

Ne

−0.1 0 0.1 0.2 0.3 0.4−60

−50

−40

−30

−20

−10

0

z−zmin

[nm]

Usf

[K]

Ne

Cs, Rb

K

Na

Li

r P♦t♥s ♥tró♥ ❩ ♥tr ② rs♦s sstrt♦s rtr ③②s③ ② ❯rrt ❬❪ ♥ rá♦ ③qr s ♠str♥ ♥♦s ♦s sstrt♦s t③♦s qí ♥ r r s ♦sr ♥ ♠♣ó♥ st r ♦♥ s ♥ r♦ ♦s ♣♦t♥s ♥tró♥ ♦♥ s ② ♥ í♥ r②s ② r②s ②♣♥t♦s ♥ ♣♦t♥ t♣♦ ♣r Wsf/kB = ② rs♣t♠♥t ♥ ♠s rs r♦ ssss s ♦♥ ♦s ♣♦t♥s ♥③♥ s ♦r ♠í♥♠♦

♦♥♥♥t s rs ♦rrs♣♦♥♥ts ♥tró♥ ♦♥ s ② óts q ♦s ♣♦t♥s ♣r

② s s♦♥ ♠② s♠rs ♥ st rá♦ t♠é♥ s rr♦♥ rs ♣♦t♥ ♣r sst♠

s ♦♥ ♣r ♦s ♥t♥ss Wsf/kB = 48 ② s♥♦ ♦s ♣rá♠tr♦s σsf = ♥♠ ②

d = ♥♠ t♦♠♦s ❬❪ óts q ♥ s♦ Wsf/kB = 50 ♣♦t♥ rst♥t s ♠②

s♠r ❩

s♦ró♥ s♦r s ②

s ♣ ♦♥r q ♦s sstrt♦s s ② tr♥ é♠♥t ♥ trtr

s r♣♦rt t♦s ①♣r♠♥ts q ♥♥ q s ♠♦♦ ♣♦r ❬❪ t♠♣rtrs r♥s

rít ② q s ♥♦ ♦ s s st♠♦♥s tórs s♦♥ ♦♥trt♦rs rst♦s ♦t♥♦s ♦♥ s♠♦♥s

♦♥t r♦ ❬❪ sr♥ q ♥♦ ♠♦ ♠♥trs q á♦s ♦♥ ❬❪ ♥♥ q s ♥ ♠r♦

♦s t♦rs st út♠♦ tr♦ ♥♦ ♣r♦♥ tr♠♥r ♥ ré♠♥ ♣r♠♦♦ ♦♠♦ sí ♦ ♣♠♦s r

♥♦s♦tr♦s

♥ s ró ♥ ♦♥♥t♦ s♦tr♠s s♦ró♥ s♦r strtr ♥ q

t♠♣rtr ♠♦♦ Tw st ♣♦r ♦ ♦s r sñ ♦♥ trá♥♦s ♦sr♠♦s sts

rs ♠ás t♠♥t ♠♦s q ①st ♥ st♦ ♥ t♦r r♠♥t♦ Γl ♥ s rs trá♥♦s ②

r♦s ♠á①♠♦ ♥ r trá♥♦s ② q st st♦ s♣r ♥③rs t♠♣rtr

♦rrs♣♦♥♥t s♦tr♠ sñ ♦♥ ír♦s st♦ ♥ q Tcpw st ♦♠♣r♥ ♥tr ②

í♥ ♣r♠♦♦ ♦♥str ♦♥ ♦s t♦s sts s♦tr♠s s ♠str ♥ st ♦♥

rr♦ ♥ ♦r Tw = st rst♦ stá ♥ ♥ r♦ ♦♥ ♦s ♦rs ①♣r♠♥ts t♦s

♥ s s ❬ ❪ ♦♥ s r♣♦rt q st tr♥só♥ ♦rr ♦s

Page 80: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.25 −0.2 −0.15 −0.1 −0.05 00

2

4

6

8

10

12

∆µ/kB [K]

Γ l

Ne/Rb

r s♦tr♠s s♦ró♥ s♦r rtr ③②s③ ② ❯rrt ❬❪ r sñ ♦♥ trá♥♦s ♦rrs♣♦♥ ♥ t♠♣rtr sñ ♦♥ r♦s s s♦tr♠ ② q ♣♦s ír♦s♦rrs♣♦♥ strtr ♦♥♥t♦ s♦tr♠s ♣♦♥ ♥ í♠t Tcpw st t♠♣rtr rístr ♥ ♥tr♦ t♠♣rtrs q ♥ ♥tr ♦s ②

35 37 39 41 43 45−1

−0.8

−0.6

−0.4

−0.2

0

T [K]

∆µpw

/kB [K

]

Li

Na

K

Rb

Tc

Ne

r í♥s ♣r♠♦♦ ♦rrs♣♦♥♥ts s♦r♦ s♦r r♥ts sstrt♦s rtr ③②s③ ② ❯rrt ❬❪Pr s ② ♥t♥s tró♥ s s é♥t ♦♠♦ ♣ ♦srrs ♥ ♦rrs♣♦♥♥t í♥ ♣r♠♦♦ s ♥st♥s

Page 81: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.25 −0.2 −0.15 −0.1 −0.05 00

5

10

15

20

25

30

∆µ/kB [K]

Γ l

Ne/K

r s♦tr♠ s♦ró♥ s♦r rtr ③②s③ ② ❯rrt ❬❪ r sñ ♦♥ strs ♦rrs♣♦♥ ♥ t♠♣rtr r sñ ♦♥ trá♥♦s s s♦tr♠ q q ♣♦s r♦ss s♦ t♠♣rtr ② ír♦s ♥ óts st♦ ♥ ♦r t♦r r♠♥t♦ ∆Γl = ♥ t♠♣rtr ② ∆Γl = 25 ♣r

Pr♠íts♥♦s ♦♠♥tr s s♠♦♥s ♥♠érs s ♦ ♣♦r rtr♦♦ ② ♦♦r♦rs ♥ ♠r♦

❬❪ s ♠s♠s r♦♥ r③s ♥tr♦♥♦ ♥ ♦rt ♥ ♣♦t♥ ♣rs ♠♥r t q

♣r ♥ st♥ ♥trtó♠ s♣r♦r ♦s 5σff st ♣♦t♥ s ♦♥sr ♥♦ ♥ ♥r♠♥t ♦s

♦rs r♣♦rt♦s ♣♦r s♠♦♥s s♦♥ t♦♠♦s ♦♠♦ rr♥ ♦ q ♠♥t st t♣♦

s♠♦♥s ♥♦ ♣ ①♣rs ♠♦♦ ♣♦r s ♥ ♥ ♠♣♦rt♥t rí q rr s

t♠ñ♦ ♥ t③ ♥ ♣♥♦ xy 10σff ×10σff s s♥t♠♥t r♥ ♣r srr

♦♥t ♦rr♦♥ sst♠ ♦♥ ♣rsó♥ rqr r Tc

P♦r ♦tr♦ ♦ ♥ s♦ s ② ♦s ♣♦t♥s ❩ s♦♥ ♣rát♠♥t é♥t♦s s r ♥tr♦ ♥str♦

sq♠ ♣r♦①♠♦♥s s t♥ s ♠s♠s ♣r♦♣s q P♦r ♦ t♥t♦ t♠é♥ ♠♦rí

s Pr ♦t♥r ♥♦♠♦♦ rí q tr tró♥ s st ♣♦s ② s♦ ♣r♦♣st ②

st ♣♦r ♥♦tt♦ ② ♦♦r♦rs ❬❪ r♣♦ ♦♥ ♥♦ ♦s ♦♦r♦rs s t♦r ♣♦t♥ ❩

♥ s ♠str♥ s♦tr♠s ♦rrs♣♦♥♥ts s♦ró♥ s♦r st sstrt♦ tr ♠ás

♥t♥s♠♥t q ♣♦r s r③ó♥ ♣r q ♣s♦ t♠♣rtrs s ♦t♥ ♠ás s♦tr♠s ♥tr Tw ②

Tc ♣ ♦srr q ①st ♥ st♦ ♠② ♣qñ♦ ♥ ♦r t♦r r♠♥t♦ ♣r♦①♠♠♥t

∆Γl = ♥ t♠♣rtr ♠♥trs q ♦s st st♦ ♥③ ♥ ♦r ♠②♦r ♣r♦①♠♠♥t

∆Γl = 25 st ♦♠♣♦rt♠♥t♦ t tr♠♥ó♥ t♥t♦ Tw ♦♠♦ Tcpw q s stú ♥tr ♦s ②

♦s

í♥ ♣r♠♦♦ ♣r sst♠ stá ♥ ♥ st ♦s t♦s ♦♥

Tw =

P♦r út♠♦ ♥ r♦ s ♥ ♠♦♦ rs♠♥ ♦ sñ♦ st qí ♦s rst♦s ♥str♦s

á♦s ② s ♦s ♦♠♣r ♦♥ ♦s q ♣r♥ ♥ ♦rí

Page 82: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦ Pr♦♣s ♠♦♦ ♦rrs♣♦♥♥ts s♦r♦ s♦r sstrt♦s ♣♥♦s ♦♥♦r♠♦s ♣♦r ♠ts ♥♦s② ♦♥ st♦s W ∗

sf

s t♠♣rtrs ♠♦♦ Tw ② rít ♣r♠♦♦ Tcpw ①♣rss ♥ ♥ s♦ Tcpw s♥ ♦t s♣r♦r ♣r st t♠♣rtr ♣ ♠♦r ♦ ♥♦ s♣r ♥ st s♦ ❲ ♥♦♥tt♥ ♥ q ♥♦ ♠♦ sstrt♦② r②♥ ♥ s♦ t♦r apw q ♦rrs♣♦♥ ó♥ st ❬ ❪P❲ rr♥ ♦s rst♦s ♦t♥♦s ♠♥t ♥str♦s á♦s ② ♦s rst♦s q s ♦t♥♥s♥♦ ♦tr♦s ♥♦♥s ♥tr ♣ré♥tss s ♥ rr♥ ♦♥ r♦♥ t♦♠♦s st♦s t♦s

Pr♦♣ s W ∗

sf Tw①♣r♠♥t ❬❪ ❲

Tw ❬❪ Tw ❬ ❪ ❲ ❲

Tw ❬❪ Tw ❬P❲❪

apw/kB [−1/2]❬P❲❪

Tcpw ❬❪ Tcpw ❬❪ Tcpw ❬P❲❪

0 1 2 3 4−1.75

−1.5

−1.25

−1

−0.75

−0.5

−0.25

0

Γl

∆µ/k

B [K

]

Ne/Li T=38 K

r s♦tr♠s s♦ró♥ ♦rrs♣♦♥♥ts s♦r♦ s♦r ♥ sstrt♦ rtr ③②s③ ② ❯rrt ❬❪♥ rá s ♦sr ♦♠♦ ♠ ♣♦t♥ qí♠♦ r♦ ♥ ♥ó♥ t♦r r♠♥t♦ ♣r sst♠ ♥ t♠♣rtr r só ♦♥ trá♥♦s ♥srt♦s ♦rrs♣♦♥ á♦s ♦♥s t③ó ♣♦t♥ ❩ ♠♥trs q s rs ♦♥ r♦s ② ír♦s r♦♥ ♦t♥s t③♥♦ ♣♦t♥ t♦♠♥♦ Wsf/kB = 48 ② rs♣t♠♥t ♥ s♦ s í♥s r②s ♥♥ s ♦♥str♦♥s ①

Page 83: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦ró♥ s♦r ②

♥ s♦ s♦r♦ ♥ ② ♥ ♣r♥ ♥s ♦♥tr♦♥s ♥ trtr á♦s r③♦s ♣♦r

♥♦tt♦ ② ♦♦ ♥ s rst♦s ❬❪ sr♥ ①st♥ ♠♦♦ ♣♦r ♦ t♠♣rtr

rít ♠♥trs q ♦♥ ② ♦♦r♦rs ❬❪ s♦r s s♠♦♥s ♥♠érs ♦♥ r③s ♣r

♣♦t♥ rr♥ ♦♥só♥ ♦♣st

♠♦s ♥③♦ s ♣r♦♣s ♠♦♦ ♦♠♣t♥♦ s s♦tr♠s s♦ró♥ s♦r ♠♦s sstrt♦s s♥♦

♦s ♦rrs♣♦♥♥ts ♣♦t♥s ❩ ♦s rst♦s ♥str♦s á♦s stá♥ r♦ ♦♥ s ♦♥s♦♥s

♥♦tt♦ ② ♦♦r♦rs Pr ♠♦s sstrt♦s ② ♠♦s ♥♦♥tr♦ ①st♥ tr♥s♦♥s

♠♦♦ ss ♣♦r ♥ ré♠♥ ♣r♠♦♦

Pr ♦♠♣tr st♦ t♠é♥ ♠♦s ♦♥ ♥str s♦tr♠s s♦ró♥ ♣r T = 38 s♥♦

♣♦t♥ ♦ ♣♦r ♠♦s ♦rrs ♣r ♦s ♦s ♦rs Wsf ♦♥sr♦s ♥

♦♥s♥t♠♥t ♣rs♥t♠♦s ♥ rst♦s ♣r s♦r♦ s♦r ♦t♥♦s t③♥♦

♣♦t♥ ❩ ② ♣r ♦s ♦rs Wsf/kB = 48 ② ♦s sts s♦tr♠s ♦rrs♣♦♥♥ ♥

t♠♣rtr P♦♠♦s ♣r♦r ♦♣♦rt♥ ♣r srr ♣r♦♠♥t♦ q s s ♣r r

s ♦♥tr♦♥s ① árs s q tr♠♥♥ s í♥s ♦r③♦♥ts r②s ♥

♥s♠ ♥ó♥♦ ♥♦s ♣r♠t r ∆µ(T ) = µ(T )−µ0(T ) ♣r t♦♦ ♦r n ♥♦ ♥ st ♦♥t①t♦

r ① ♥ ♦♦♣ ♥ r ❲s ♦s ♦s st♦s ♥ ♦①st♥ st ♦③♦s ♥ nmin ② nmax sts♥

µ(nmin) = µ(nmax) = µe(Ωe/A) .

st♦s st♦s s♦♥ tr♠♥♦s trés ♦♥stró♥ ① árs s

ˆ nmax

nmin

[µ(T )− µ0(T )] dn = µpw(T ) [nmax − nmin] .

strtr s s♦tr♠s ♥t ①st♥ rí♠♥s ♣r♠♦♦ ♣r t♦♦s ♦s

♣♦t♥s ♥③♦s st ♠♥r ♣♦♠♦s ♦♥r q t♥t♦ ♣r ♣♦t♥ ❩ ♦♠♦ ♣r

♠♦ ♥tr♦ ♦r♠s♠♦

♥♥♦ ♥ ♥t q s s♦tr♠s s♦r ② ♥♦ ♣rs♥t♥ r♥s ♥♠♥ts ♦♥ s

s♦r ♥♦ ♣rs♥t♠♦s rs ♦♥ s ♦♥str♦♥s ① rt♠♥t ♥♠♦s s ♦rrs♣♦♥♥ts

í♥s ♣r♠♦♦ ♥

st♥♦ ♦s t♦s ♣r ♦♥ ♦t♠♦s Tw = ♣♦r ♦tr♦ ♦ ♦t s♣r♦r ♣r

t♠♣rtr rít ♣r♠♦♦ s Tmaxcpw = 42 Pr ♦s ♦rrs♣♦♥♥ts ♦rs ♦t♥♦s s♦♥ Tw =

② Tmaxcpw = 39

♦s rst♦s ♥str♦s á♦s stá♥ ♥♦s ② s ♦♠♣r♥ ♦♥ ♦s s♣♦♥s ♥ ♦rí ♥ r♦

♥ st s♦ r♥ ♦♥ rs♣t♦ ♦s ♦rs ♦t♥♦s ♥ tr♦ ♥♦tt♦ ② ♦♦ ❬❪ s tr

t♥t♦ s♦ r♥ts ♣♦t♥s ♣rs ♦ sí ♦♠♦ t♠é♥ t③ó♥ r♥ts ♦rs ♣r

♦♥t q ♦rr tér♠♥♦ s ♥ ♥♦♥

Page 84: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 2 4 6 80

20

40

60

80

100

z*

ρ [n

m

]−3

Ne/Mg T=28 K

ρl

ρv

r Prs ♥s s♦ró♥ s♦r ♣r ♦s r♥ts ♥ú♠r♦s ♣rtís rtr ③②s③ ②❯rrt ❬❪ ♣♦t♥ ♥tró♥ ♦rrs♣♦♥ ❩ t♠♣rtr s ♦ ♥ ♦s sí♠♦♦sρl ② ρv ♥♥ ♥s ♣r♦♠♦ ♣♦ró♥ íq ② ♦rrs♣♦♥♥t ♣♦r rs♣t♠♥t ♥ sts♦ ρl = ♥♠−3 ② ρv = ♥♠−3 ♣♥ ♦srr ♥ rá♦ ♦s ♣rs s♦♦s st♥t♦s t♦rs r♠♥t♦ r ♥r♦r ♦rrs♣♦♥ Γl = ② rst♥t Γl = ♥ ♠s♠ rá s ♦♠♣r♥♥str♦s rst♦s ♦♥ ♦s ♦rs ♦s ♠♥t ír♦s ①trí♦s ❬❪

−8 −7 −6 −5 −4 −3 −2 −1 00

0.5

1

1.5

2

2.5

3

3.5

Γ l

−8 −7 −6 −5 −4 −3 −2 −1 020

22

24

26

28

30

∆ µ /k B [K]

T [K

]

(a) Ne/Mg

(b) T

w

r s♦tr♠s s♦ró♥ ♣r s♦r♦ s♦r ♥ sstrt♦ rtr ③②s③ ② ❯rrt ❬❪ ♦♠♥③♥♦ s r ③qr s t♠♣rtrs s♦♥ ♠r ♦♥ ír♦s í♦s ② ♠str ♦rrs♣♦♥♥t í♥ ♣r♠♦♦

Page 85: Adsorción de fluidos sobre sustratos sólidos, estudiada

s♦ró♥ s♦r

♥ s♦ s♦ró♥ s♦r ♣♦t♥ s♦ró♥ ♦♥Wsf/kB = 95 s rt♠♥t trt♦

♦ ♥tró♥ s s ♦ ♠ás ♥t♥s q ♦♥ ♣♦r ♦ t♥t♦ s s♣r ♥ Tw r♥ t♠♣rtr

tr♣ ♦♥ ♥ ré♠♥ ♣r♠♦♦ ♦r st ①♣tt ♦♥r♠ ♣♦r s♠♦♥s ♦♥t r♦ q

sr♥ ♥ tr♥só♥ ♣r♠♦♦ r♥ t♠♣rtr tr♣ ♠♥trs q ♥♦ ①st♥ r♣♦rts á♦s

r③♦s ♥ ♠r♦ s ♥ s s♠♦♥s ♦rrs ♣♦r ♦♥ ② ♦♦r♦rs ❬❪ s♥♦

♥ ♣♦t♥ t♣♦ s tr♠♥ó q ♠♦♦ s♣r s ♣r♦ ♥ t♠♣rtr

♥ ♠♦ ♥♦ s ♣♦ r③r ♣r st sst♠ á♦s ♥ ♦♥t①t♦ ♦r♠ ♦♥ ♣r♦♣st

r ② ♦s♥r ② ♦s ♦♠♣♠♥t♦s sr♦s ♣♦r ♥♦tt♦ ♦♦ rtr♦♦ ② ♦ ♥ s s ❬ ❪

st ♠♣♦s s q ♥ s ♣r♦①♠ó♥ s ♣r♦ ♥ s♦ó♥ t♠♣r♥ ♣r T > Tt ②

s s♦♦♥s r♥ ♥♦ t♠♣rtr s ♣r♦①♠ tr♣ st ♥♦♥♥♥t ♥♦ s ♣rs♥t ♥♦

tr♠♦s ♦♥ sr ♣♦r ♥♦s♦tr♦s

♥ s ♠str♥ ♦s ♣rs ♥s ♣r s♦r♦ s♦r ♦s ♦♥ ♥str ♣r♦♣st

♣r ② s♥♦ ♣♦t♥ ❩ ② s ♦s ♦♠♣r ♦♥ ♦s ♦t♥♦s ♠♥t s♠♦♥s ♦♥t r♦

❬❪ ♥ ♥ s s♠♦♥s ♥♦ s t③r♦♥ ①t♠♥t ♦s ♠s♠♦s ♣♦t♥s q s♠♦s ♥♦s♦tr♦s ♦s

♣rs r♥ ♠♥t ♣r ♥ r♥ rt♠♥t ♣♦♦ ♣r ♥ ♦r ♠á①♠♦ q ♥③

♥s ♦rrs♣♦♥♥t r s♦ ♦♥ ♠②♦r ♥ú♠r♦ ♣rtís st r♥ ♦rrs♣♦♥

♥ só♥ ≃ 13% rs♣t♦ ♦s ♦rs q rr♦♥ ♦s á♦s r③♦s ♦♥ s♠♦♥s s

♥rís t♠♣♦♦ r♥ sst♥♠♥t s s♦♥s ♥♦ s♣r♥

s s♦tr♠s s♦ró♥ stá♥ s ♥ ♦♠♦ s ♣ ♦srr s♦tr♠ ♥♦

♣rs♥t ♥♥ú♥ ♦♦♣ ♥ r ❲s ♣♦r ♥ ♥♦ s ♥sr♦ tr③r ♥♥♥ ♦♥stró♥ ① st♦

s s♣r♥ q t♠♣rtr rít ♣r♠♦♦ r♦♥rá r♦r ♦s í♥ ♣r♠♦♦

♦♥str ♦♥ ♦s ♦rs ∆µpw ♥ ♥ó♥ t♠♣rtr stá r ♥ st♥♦ st♦s

t♦s ♦♥ ♦t♠♦s q t♠♣rtr ♠♦♦ stá ♠♥t ♣♦r ♦ tr♣ Tw =

s r ♠♦ qr t♠♣rtr T > Tt ♦s s t♠♣rtrs tr♠♥s ♥ st ♥áss

stá♥ ♥s ♥ r♦ str♦ ♦r Tw s s♠r Tw = 22 tr♠♥♦ ♣♦r ♦♥ ② ♦♦r♦rs

❬❪ ♠ás r♥ Tcpw − Tw ♦t♥ ♣♦r ♥♦s♦tr♦s ♦♥ ♦♥ ♠♥t ss s♠♦♥s

s♦ró♥ ró♥ ♥s♠ ♥ó♥♦

♦r ♦♥ ❬❪ r ♠♦ t♦s s s♣rs ♥s ♠♥trs q ♦s á♦s r③♦s ♠♥t

♦r♠s♠♦ ❬❪ sr♥ ♠♦♦ s♦♠♥t ♣r sstrt♦s ♦♠♦ ② P♦r ♦tr♦ ♦ s♠♦♥s

♥♠érs ❬❪ ♥ ♦♠♦ rst♦ q r ♠♦ ♣r♦ ♥♦ ♥

♥ s♦ 2 str ② ♦♦r♦rs ❬❪ sr♥ q r♠♥t♦ ♣í s♦r s ♦♥t♥♦

♣st♦ ♠♥st♦ ♥ ♦s ①♣r♠♥t♦s ② q ♣ srrs ♣rt♠♥t ♥ ♦♥t①t♦ ss á♦s

r③♦s ♣♥♦ st♦s t♦rs srr♦r♦♥ ♥ ♣♦t♥ s♥♦ rst♦s á♦s q ♥ s♦

r♦s ♣r♠r♦s ♣r♥♣♦s ♦s ♥t ♣♦r rs ② ♦♦r♦rs ❬❪ ♥ ♠r♦ ♦s r♣♦rt♥

s♦tr♠s ♣r T = 105 ② q s♦♥ ♥♦♥sst♥ts ♥tr sí ♦♠♦ r♠♦s ♠ás ♥t

Page 86: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.1−0.05 0 0.05 0.1 0.15 0.2 0.25 0.3−500

−400

−300

−200

−100

0

z − zmin

[nm]

Usf

/kB [K

]

Ar

Cs Rb

K

Na

Li

Mg

CO2

r P♦t♥s ♥tró♥ ♥tr r ② rs♦s sstrt♦s ♥ ♥ó♥ st♥ sstrt♦ rtr ② ③②s③❬❪ ♦♦s ♦s ♣♦t♥s ①♣t♦ 2 ♦rrs♣♦♥♥ ♣♦t♥s t♣♦ ❩

P♦r ♦tr♦ ♦ ♦♠♦ ② ♠♥♦♥♠♦s ♥tr♦r♠♥t ♥ s♦ s♦ró♥ r s♦r s ♦sr♦ ①♣r

♠♥t♠♥t ♠♦♦ ♣♥t♦ tr♣ ❬❪

♦♦s st♦s s♦s ♦s ①♠♥♠♦s ♥ st ss ♣♥♦ rsó♥ ♣rs♥t ♥ ♣ít♦s ♥tr♦rs

q ♥ s♦ ♣r str s♦ró♥ r s♦r t♦♦s ♦s sstrt♦s ♥♦s ② ♣r

♠♦s t③♦ ♣♦t♥ ❩ ♦s ♦rs ♦s ♣rá♠tr♦s q ♥tr♥♥ ♥ st ♣♦t♥ stá♥ st♦s ♥

r♦

♥ s ♣ ♦srr ♦♠♦ ♣♥♥ st♦s ♣♦t♥s st♥ sstrt♦ Pr 2 ♠♦s

t③♦ ♠s♠♦ ♣♦t♥ q sr♦♥ str ② ♦♦r♦rs ❬❪ ♥ rá♦ t♦s sts rs stá♥ ♥trs

♥ ♦r z ♦rrs♣♦♥♥t ♠í♥♠♦ ♣♦t♥ ♣♦t♥ r s♦r q r s

st r

s♦ró♥ r s♦r ♠ts ♥♦s

♣ ♦rr♦♦rr ♥ trtr q r s♦r♦ s♦r s ♥♦ ♦s sst♠s ♠ás st♦s

♠str s s♦tr♠s ♦t♥s ♦♥ ♥str♦s á♦s ♥ rá♦ ③qr st r ② s ♥

♦ s rs♣ts ♦♥str♦♥s ① í♥ ♣r♠♦♦ q í s r s ♠str ♥ rá♦

r

♥ s ♣ ♦srr ♣rs ♥s ♦t♥♦s ♣r T = 114 ♠ q ♥ú♠r♦

♣rtís ♠♥t s ♣s♥♦ s ♦s ♣rs ♥r♦rs ♠♥♦r s♣s♦r ♥ í♥s r②s ♦s ♣rs

♠ás rs♦s q stá♥ ♦s ♦♥ í♥s ♦♥t♥s st♦ ♥ s♣s♦r s ♣ís s stá ♦

st♦ ♥ ♦r t♦r r♠♥t♦ ♠♦str♦ ♣♦r s♦tr♠ ♦rrs♣♦♥♥t ♥

Page 87: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7−5

−4

−3

−2

−1

0

Γl

∆µ/k

B [K

]

Ar/Li

108 110 112 114 116 118 120−4

−3.5

−3

−2.5

−2

−1.5

−1

−0.5

0

T [K]

∆µpw

/kB [K

]

Ar/Li

Tw

r s♦tr♠s s♦ró♥ r s♦r rá♦ ③qr ♦rrs♣♦♥♥t í♥ ♣r♠♦♦ s ♣♦srr ♥ rá♦ r rtr ② ③②s③ ❬❪ Pr rá♦ ③qr ♦s trá♥♦s rr ♦rrs♣♦♥♥ ♦s ír♦s ♦s ♠♥ts r♦s trá♥♦s ♦ ② s strs ♥ r r ♦s ír♦s ♦rrs♣♦♥♥ ♥str♦s á♦s ② r st ♦rrs♣♦♥

st♥♦ ♦s t♦s í♥ ♣r♠♦♦ ♦♥ ♦t♠♦s Tw = 110 ♣♦r

♦♠♣tt st í♥ ♣r♠♦♦ t♠é♥ ♥♠♦s ♥ ♦t s♣r♦r ♣r Tcpw s

♦ ♠♦str♠♦s rá♦s ♦♥ s s♦tr♠s s♦rsó♥ r s♦r ② rt♠♥t ♥♠♦s s ♦rrs♣♦♥

♥ts í♥s ♣r♠♦♦ ♥ s♦ s s♥ts t♠♣rtrs ♠♦♦

Tw = ♣r ② Tw = ♣r Pr st út♠♦ sst♠ ♥♦ s ♥ r♣♦rt♦ st

♠♦♠♥t♦ ♦tr♦s st♦s ♠♦♦ ② ♣r♠♦♦ ♦♥ ♦r♠s♠♦

♥ ♠♦ ♠♦str♠♦s s s♦tr♠s s ♣r s♦ró♥ r s♦r ♥ strtr

sts rs ♥t ①st♥ ♥ í♥ ♣r♠♦♦ ♦♥ ♥ tr♥só♥ ♠♦♦ ♣r ♥

t♠♣rtr ♠♥t ♥r♦r ♦s st í♥ ♣r♠♦♦ Tw = ♠s♠♦ rá♦

s ♥r q Tcpw t♥ ♦♠♦ ♦t s♣r♦r ♦r

♥ q ♠str s í♥s ♣r♠♦♦ s ♣r r s♦r♦ s♦r r♥ts sstrt♦s

♠ás ♥str♦s t♦s ♠♥ts r♦s trá♥♦s ② ír♦s s♥ r♥♦ ♠♦s ♥♦ í♥s ♣r

② ♠♥ts ② r♦s r♥♦s ♦s s♥♦ ♦tr ♥ ❬❪ ♣ ♦srr q s ♦s

í♥s r♣♦rts ♥ st út♠ rr♥ ①♥ ♥ ♦rr♠♥t♦ Tc

♥ r♦ r♥♠♦s ♦s rst♦s ♦t♥♦s ♦♥ ♥str♦s á♦s ♣r s t♠♣rtrs ♠♦♦ ②

♣r♠♦♦ ♣rá♠tr♦ st apw ♥t♦ ♦♥ t♦s q ♣♦s ♥ ♦rí

♦♦s ♦s á♦s sr♥ q r ♠♦ s ♥ ♦s ♦rs Tw ♥♦ ♦♥♥ s r♥s ♥tr

♥str♦s rst♦s ② ♦s ♥♦tt♦ ② ♦♦ ❬❪ ♣r r ② t♠é♥ ♣r r s ♣♥ trr ♦♠♦ ♥

s♦ s♦ r♥ts ♣♦t♥s ♣rs f f ② t③ó♥ r♥ts ♦rs ♣r ♦♥t

tér♠♥♦ s ♥♦♥

♦tr♦ rst♦ ♣r r ♦ ♣♦r ❩♥ ② ❩♦♥ ❬❪ ♣♦str♦r♠♥t ♥str♦ tr♦ ❬❪

t③ ♣♦r s♦s t♦rs ♦♥t♥ ♥ ♦rró♥ s ♥ ♥ tr♥s♦r♠ r♣♦ r♥♦r♠③ó♥

❬ ❪ q rí sr ♣r trt♠♥t♦ ♥ó♠♥♦s rít♦s st ♥♦ ♦r Tw s s♦♠♥t

Page 88: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7 8 9 100

0.2

0.4

0.6

0.8

1

1.2

1.4

z*

ρ*

Ar/Li T=114 K

r Prs ♥s ♥ s♦ró♥ r s♦r ♣r r♥ts ♥ú♠r♦s ♣rtís rtr ②③②s③ ❬❪ s rs r②s ♦rrs♣♦♥♥ ♣ís ♥s ♠♥trs q s♦♥ ♣ís rss st♦ ♥ strtr ♣rs stá ♦ ♦♥ st♦ q ♠str s♦tr♠ ♥

105 115 125 135 145 155

−3.5

−3

−2.5

−2

−1.5

−1

−0.5

0

T [K]

∆µpw

/kB [K

]

Ar

Tc

Li

Li Na

Na Rb K

r í♥s ♣r♠♦♦ ♦rrs♣♦♥♥ts r s♦r♦ s♦r ♠ts ♥♦s rtr ② ③②s③ ❬❪ ♦srs♦s sí♠♦♦s s♥ r♥♦ ♦rrs♣♦♥♥ á♦s r③♦s t③♥♦ ♥str♦ ♥♦♥ ♦s t♦s sñ♦s♦♥ sí♠♦♦s r♥♦s ♦♥ ♥r♦ r♦♥ ①trí♦s ❬❪ s í♥s sós s♦♥ s q st♥ st♦s t♦s♠♥t

Page 89: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦ Pr♦♣s ♠♦♦ ♦rrs♣♦♥♥ts r s♦r♦ s♦r sstrt♦s ♣♥♦s ♦♥♦r♠♦s ♣♦r ♠ts ♥♦s 2 ② ♦♥ st♦s W ∗

sf

s t♠♣rtrs ♠♦♦ Tw ② rít ♣r♠♦♦ Tcpw ①♣rss ♥ r♦s ♥ ♥ s♦ Tcpw s ♥ ♦t s♣r♦r ♣r st t♠♣rtr ♣ ♠♦r ♦ ♥♦ s♣r ♥ st s♦ ❲ ♥ q r ♥♦ ♠♦ sstrt♦ ② ♥♠♦♦ ♦♥t♥♦ ♣rtr ♥ t♠♣rtr ♠②♦r ♦ tr♣ t♦r apw q ♦rrs♣♦♥ ó♥ st ❬ ❪P❲ rr♥ ♦s rst♦s ♦t♥♦s ♠♥t ♥str♦s á♦s ② ♦s rst♦s q s ♦t♥♥s♥♦ ♦tr♦s ♥♦♥s ♥tr ♣ré♥tss s ♥ rr♥ ♦♥ r♦♥ t♦♠♦s st♦s t♦s

Pr♦♣s s 2 W ∗

sf Tw ①♣r♠♥t ❬ ❪

Tw ❬❪ Tw ❬❪ ❲ ❲ ± Tw ❬ ❪ Tw ❬❪ Tw ❬P❲❪ Tt Tt Tt

apw/kB [−1/2]❬P❲❪

Tcpw ❬❪ Tcpw ❬❪ Tcpw❬P❲❪

0 2 4 6 8 10 12 14−1

−0.8

−0.6

−0.4

−0.2

0

Γl

∆µ/k

B [K

]

Ar/Rb

r s♦tr♠s ♦rrs♣♦♥♥ts r s♦r♦ s♦r rtr ② ③②s③ ❬❪ r sñ ♦♥ ír♦s♦rrs♣♦♥ ♥ t♠♣rtr q ♣♦s ♠♥ts ♥ ♥ ♦♥ r♦s♦rrs♣♦♥ ② ♠r ♦♥ trá♥♦s ♥

Page 90: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7

−40

−30

−20

−10

0

Γl

∆µ/

k B [K

]

Ar/Mg

r s♦tr♠s s♦ró♥ r s♦r ♣r rs t♠♣rtrs rtr ② ③②s③ ❬❪ í♥ ♦♥ ír♦s♦rrs♣♦♥ T = 105 q ♣♦s ♠♥ts í♥ ♦♥ r♦s Tnb = ② trá♥♦s Tt =

♥ ∼ 15% ♠ás ♦ q ♥str♦

P♦r ♦tr♦ ♦ ♦♠♦ s ♥ ♥ r♦ s s♠♦♥s r③s ♦♥ sr♥ ♦♥trr♠♥t

♦ ♥♦♥tr♦ ♣♦r ♥♦s♦tr♦s q r ♥♦ ♠♦ ♥ ❨ ♠♦s ♥tr♦r♠♥t q st♦s rst♦s

♣♦s ♣♦r rtr♦♦ ② ♦♦r♦rs ❬❪ t♠♣♦♦ ♥ ♥t ♠♦♦ ♣♦r r♦

①♣r♠♥t♠♥t ❯♥ ♣♦s s st ② ♠♥♦♥♠♦s ♥ ó♥

s♦ró♥ r s♦r ② 2

♥ s ♠str♥ s♦tr♠s ♣r r s♦r ② ♥ s ♦rrs♣♦♥♥ts s♦ró♥

r s♦r 2 ♥ st út♠♦ s♦ s ró ♥ í♥ ♣♥t♦s ② r②s ② ♥t♦ s rs rs ♥str♦s

á♦s r q ♦tr♦♥ str ② ♦♦r♦rs ♣s ♥ ♥ P ❬❪ ② q ♥♦s♦tr♦s

♣rs♥t♠♦s ♥ í s ♠str♥ ♦s s♦tr♠s ♣r s s♥♦ ♥♦ ♣♦t♥

í♥ ♦♥ ír♦s q ♣r♦♣♦♥♥ ♦s t♦rs ❬ ❬❪❪ ② ♣♦t♥ í♥ ♦♥ trá♥♦s

♦ ♣♦r ♦♥ ♦s ♣rá♠tr♦s ♣r♦♣st♦s ♣♦r ♥r ② ♠ εeff/kB = (εff εss)1/2

/kB =

σsf = (σss + σff )/2 = ♥♠ ② ρsσ3sf = ♣r♦♠ s ♦♠♦ s ♣ ♦srr ♥ q

s♦tr♠ t♠♣rtr r♥ tr♣ s♥♦ ♣♦t♥ s♦ró♥ q ♣r♦♣♦♥♥ ♥ s

tr♦ ♣rs♥t ♥ ♦r♠ ♠s♦ ♦st♦r ② ♥ rró♥♦ r ♦♥ s♦tr♠ ♣r ♥ ♦r

t♦r r♠♥t♦ Γl ≈ 3 st ♥ s q ♣♦t♥ ♣rs ♦ ♦ ♣♦r

♣r♦ ♥ s♦ó♥ ♣r♠tr ♣r T > Tt

Page 91: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7

−50

−40

−30

−20

−10

0

Γl

∆µ/

k B [K

]Ar/CO

2

r s♦tr♠s s♦ró♥ r s♦r 2 ♣r ♥s t♠♣rtrs rtr ② ③②s③ ❬❪ í♥ ♦♥ ír♦s♦rrs♣♦♥ T = 105 ♠♥ts r♦s ② trá♥♦s s rs r②s ② ♣♥t♦s ② r②s s♦♥ s♦tr♠s s ♣♦r str ② ♦♦r♦rs ♥ ❬❪

0 1 2 3 4 5 6 7 8−25

−20

−15

−10

−5

0

5

10

Γl

µ [K

]

r s♦tr♠s s♦ró♥ r s♦r 2 s ♣♦r str ② ♦♦r♦rs st rá♦ ♦rrs♣♦♥ ❬❪ í♥ ♦♥ trá♥♦s s s♦tr♠ ♦♥ ♣♦t♥ s s♦tr♠ss ♦♥ ♣♦t♥ s♦ró♥ ♣r♦♣st♦ ♣♦r st♦s t♦rs stá♥ ♥s ♣♦r rs ♦♥ ír♦s ② ♦♥r♦s ♦rrs♣♦♥♥♦ rs♣t♠♥t T = 105 ②

Page 92: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7−700

−600

−500

−400

−300

−200

−100

0

Γl

∆µ/k

B [K

]

Ar/Au

r s♦tr♠s s♦ró♥ r s♦r rtr ② ③②s③ ❬❪ ♠str♥ s s♦tr♠s ♦rrs♣♦♥♥ts st♠♣rtrs trá♥♦s ② ír♦s óts strtr s♠♦♥♦♣ q ♣r ♥ sts♦ ♣r s♦tr♠

s♦ró♥ r s♦r

♦♥stt② ♥ sstrt♦ rt♠♥t trt♦ ♣r r ♥ st s♦ t③ó ♥ ♣♦t♥ srt♦ sú♥

♦♥ ♦s ♣rá♠tr♦s Wsf/kB = 987 ② C3 = ♥♠3 st♦s ♦rs r♦♥ ①trí♦s ♦s r♦s

② ❬❪

str♦ st♦ r q ♥♦ r s s♦r s♦r st sstrt♦ s ♦♥♥s ♥ sss ♣s ② ♣r ♥

strtr s♠♦♥♦♣ s♦tr♠ ♠r ♦♥ ♥ trá♥♦ ♥ q ♦rrs♣♦♥ ♥ t♠♣rtr

st ♥ó♠♥♦ s s♠r r♣♦rt♦ ♥ rr♥ ❬❪ ♦♥ s st s♦ró♥ r s♦r

♥ sstrt♦ rt♦ r t rr♥ s♠t s q ♣r ♠♦s sst♠s s

♥t♥ss s ♥tr♦♥s ♥tr ♦ ② sstrt♦ s♦♥ ♣rs

s♦ró♥ ❳♥ó♥ ♥s♠ ♥ó♥♦

♥st♠♦s s♦ró♥ ❳ s♦r sstrt♦s ♣♥♦s ♠ts ♥♦s ② s♦r ♥ st út♠♦ s♦ ①st♥

t♦s ♠♣ír♦s ♦t♥♦s ♥ ①♣r♠♥t♦s s♦s t♥t♦ ♥ só♥ át♦♠♦s ♦ ♦♠♦ ♥ ró♥

tr♦♥s ♥rí ❬❪

♥ ♥str♦ st♦ t③♠♦s ♦s ♣♦t♥s ❩ ♦♥ ♦s ♣rá♠tr♦s st♦s ♥ r♦ ♥ s

♠str♥ ♦s ♣♦t♥s s♦ró♥ ♥ ♥ó♥ st♥ sstrt♦

s♦ró♥ ❳ s♦r st♦s sstrt♦s ♣rs♥t ♥ ♠♣ r st♦♥s r♦♥s ás♠♥t ♦♥

♣♦s ♣♦r r♦rrr ♥ ♠♣♦ r♥♦ W ∗

sf

♥ s♦ s tr♥s♦♥s ♣r♠♦♦ ❳ ① rts rtrísts q ♥♦ stá♥ ♣rs♥ts ♥ ♥

♥ r ♥♦ s s♦r♥ s♦r ♦s ♠s♠♦s sstrt♦s

Page 93: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8−6

−5

−4

−3

−2

−1

0

1

2

z [nm]

Usf

/εff

Xe

Mg

Li

Na

Cs

r P♦t♥s ♥tró♥ ❩ ♣r ❳ ♦♥ r♥ts sstrt♦s ♥ ♥ó♥ st♥ sstrt♦ rtr② ③②s③ ❬❪

♣r♦♣st♦ ♥ st ss ♥♦s ♣r♠t♦ ①♠♥r t♠♥t rs sts rtrísts

s s♦♦♥s s tr♠♥r♦♥ rs♦♥♦ s ♦♥s t♥t♦ ♣r r♥rs rrs ♦r♠s♠♦ ♥ó♥♦

♦♠♦ ♣r r♥rs rts r♥ ♥ó♥♦ ♦♠♥③r♠♦s sr♥♦ rst♦s ♦t♥♦s ♥ ♠r♦

♥s♠ ♥ó♥♦

♥ s ♣♥ ♦srr ♦s ♣rs ❳ s♦r♦ s♦r sstrt♦s s ② ♥ ♥♦

st♦s rá♦s s ♠str r♠♥t♦ ♣r ♥ss ♥♦ ♠♥t ♥ú♠r♦ ♣rtís ♣♦r

♥ ár ♥ s♦ t♠♣rtr ♦rrs♣♦♥ ó♥ ♥♦r♠ Tnb =

❳ ♣♦st♦ s♦r st♦s sstrt♦s ① s rtrísts tí♣s ♥ ♦ s♦r♦ ♣rs♥t♥♦ ♦s

♦♥s ♥ ♣rt ♣r r♥ ♣r ♦ sts ♦s♦♥s s♠♥②♥ ♥③á♥♦s ♥ ♦r s

♦♥st♥t ♣r ♥s q ♦rrs♣♦♥ s íq ρl ás ♦s ♣r ♦ ♣rs♥t t

♥trs íq♦♣♦r ② ♥♠♥t s ♥s s st③ ♥ ρv

s♦ró♥ ❳ s♦r ②

♥ s ♠str♥ s♦tr♠s ② í♥ ♣r♠♦♦ ♦rrs♣♦♥♥ts s♦ró♥ ❳ s♦r

♦r Tw tr♠♥♦ ♣♦r st ♦♥ s ♦t s♣r♦r ♣r Tcpw s

s♦ró♥ s♦r ♥r ♥ sr s♦tr♠s q ♣♥ sr ♣rs ♥ strtr st

♦♥♥t♦ s♦tr♠s ♥t ①st♥ ♥ tr♥só♥ ♠♦♦ ♦♥ ♥ Tw ♣♦r

Page 94: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 5 10 15 20 250

2

4

6

8

10

12

14

z*

ρ [n

m−3

]

ρv

ρl

Xe/Cs T=270 K

0 2 4 6 8 10 12 14 16 180

5

10

15

20

25

z*

ρ [n

m−3

]

Xe/Na T=246 K

ρl

ρv

0 5 10 15 200

5

10

15

20

25

30

35

z*

ρ [n

m−3

]

↑ ρl

ρv

Xe/Li T=209 K

0 3 6 9 12 150

10

20

30

40

50

60

70

80

z*

ρ [n

m−3

] Xe/Mg T=Tnb

ρl

r Prs ♥s ♦rrs♣♦♥♥ts ❳ s♦r♦ s♦r ♣rs ♣♥s sós s ② r♦♦♥ ♦ ♥♦ ♥ rá♦ ♦s á♦s r♦♥ r③♦s s♥♦ ♣♦t♥s t♣♦ ❩ ♣r ♥tró♥♥tr sstrt♦ ② ♦ ♥ s♦ t♠♣rtr s ó♥ ♥♦r♠ Tnb s ♥ts ρl ②ρv s♦♥ s ♥ss s ss íq ② ♣♦r ♥ ♦①st♥ s t♠♣rtrs ♦♥srs

0 1 2 3 4 5 6 7−1.2

−1

−0.8

−0.6

−0.4

−0.2

0

Γl

∆µ/k

B [K

]

Xe/Na

(a) 241 243 245

−1.2

−1

−0.8

−0.6

−0.4

−0.2

0

T [K]

∆µ/k

B [K

]

Xe/Na

Tw

Cpw

(b)

r rá♦ ③qr s♦tr♠s s♦ró♥ ❳ s♦r ③②s③ ② rtr ❬❪ s t♠♣rtrs t♦♠♥ s♥t r♥♦ ♦rs trá♥♦s ♦ st ír♦s ♥ ♣s♦s ♥ r♦ rá♦ r í♥ ♣r♠♦♦ ♦rrs♣♦♥♥t ♥ s rá♦ s♦tr♠s t♠♣rtr ♠♦♦ q rr♦♥ st♦s rst♦s s ② rít ♣r♠♦♦ t♥ ♦♠♦ í♠t s♣r♦r ♦s

Page 95: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6−0.7

−0.6

−0.5

−0.4

−0.3

−0.2

−0.1

0

Γl

∆µ/k

B [K

]Xe/K

r s♦tr♠s s♦ró♥ ❳ s♦r s t♠♣rtrs t♦♠♥ ♦s ♦rs trá♥♦s rr st ír♦s ♥ ♣s♦s ♥ r♦ t♠♣rtr ♠♦♦ q rr♦♥ st♦s rst♦s s ② rít ♣r♠♦♦ t♥ ♦♠♦ í♠t s♣r♦r ♦s

st ♦r s ♠②♦r q q s ♦t♥ ♥ ♣r♦①♠ó♥ q ♣r ♥ t♠♣rtr

♠♦♦ t♠♣rtr rít ♣r♠♦♦ t♥ ♦♠♦ ♦t s♣r♦r ♦r

♦s ♦rs ♦t♥♦s Tw ② Tcpw stá♥ st♦s ♥ r♦

s♦ró♥ ❳ s♦r ②

♥ ♦s rá♦s s ② s ♠str♥ s♦tr♠s s♦ró♥ q ♠♦s ♦ ♣r ♦s sst♠s

❳ ② ❳ ♥t♦ ♥♦ s♦s rá♦s r s ♥♥tr♥ s rs♣ts í♥s ♣r♠♦♦

♥ s♦ s s♦tr♠s s♦ró♥ s♦r s ♥ tr③♦ s rs♣ts ♦♥str♦♥s ① árs

s

♥ st♦s sst♠s ♦♥ ♥tró♥ sstrt♦♦ s ♠ás ♥t♥s q ♥ s♦ ② s ♠♥st ♥

strtr s♦tr♠s ♠út♣s ♦♠♦ s ♠♥♦♥s ♥ ♥ tr♦ P♥t ② ♦♦r♦rs s ❬ ❪

♥ st s♦ ♥♦s♦tr♦s ♠♦s ♥♦♥tr♦ sts ♠s♠s strtrs tr♥♦ ♦♥ ♦s ♣♦t♥s rsts ú♥

♥ s♦ rt♠♥t trt♦ s ♣♦ ♥r ♥ strtr í♥s ♣r♠♦♦ ♦♠♦ s ♣

♦srr ♥ rá♦ r

Pr ♥③r ♦♥ st ♥áss q s r③ó ♣r r♥rs rrs ♥ ♦♥t①t♦ ♦r♠s♠♦ ♥ó♥♦ ♥

s ♠str♥ ♥ ♥ s♦♦ rá♦ ♠♦♦ ♦♠♣ró♥ s í♥s ♣r♠♦♦ ♠út♣s q s ♦t♥♥

♥♦ s ♥③ s♦ró♥ ❳ s♦r ♦s rs♦s sstrt♦s st♦s qí

♥ r♦ ①♣♦♥♠♦s r♦s ♦s rst♦s q ♠♦s ♦t♥♦ r♦♥♦s ♦♥ s ♣r♦♣s

♠♦♦ ❳ s♦r ♥♦s sstrt♦s ② ♠♦str♠♦s t♠é♥ ♦s rst♦s ①trí♦s s rr♥s q í s

♥♥

Page 96: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7−6

−5

−4

−3

−2

−1

0

Γl

∆µ/k

B [

K]

Xe/Li

(c) 198 201 204 207 210

−6

−5

−4

−3

−2

−1

0

T [K]∆µ

/kB [

K]

Xe/Li

(d)

↑T

w

Cpw1

Cpw2

Cpw3

Cpw4

r s♦tr♠s s♦ró♥ ② í♥ ♣r♠♦♦ ♣r ❳ s♦r♦ s♦r ③②s③ ② rtr ❬❪ rá♦ ③qr s♦tr♠s s♦ró♥ ❳ s♦r ♥ ♦♥ s ♠str♥ s ♦♥str♦♥s ① ♣r ♥ s rs s t♠♣rtrs t♦♠♥ ♦s ♦rs trá♥♦s ♦ st ír♦s ♥♣s♦s ♥ r♦ rá♦ r strtr í♥s ♣r♠♦♦ ♦rrs♣♦♥♥t

0 1 2 3 4 5 6 7 8

−100

−80

−60

−40

−20

0

Γl

∆µ/k

B [K

]

Xe/Mg

161 165 169 173 177 181−120

−100

−80

−60

−40

−20

0

T [K]

∆µ/k

B [

K]

Xe/Mg

(f)

← Tt

Cw4

Cw3

C

w2

Cw1

r s♦tr♠s s♦ró♥ ② í♥ ♣r♠♦♦ ♣r ❳ s♦r♦ s♦r ③②s③ ② rtr ❬❪ rá♦ ③qr s♦tr♠s s♦ró♥ ❳ s♦r ♥♦ s ♠str♥ ♥ st s♦ s ♦♥str♦♥s ①♦rrs♣♦♥♥ts ♣rs♥t♥ rs ♣r t♠♣rtr tr♣ ② ♣r ♥s ♦trs t♠♣rtrs st ♦s rá♦ r í♥ ♣r♠♦♦ ♦rrs♣♦♥♥t

Page 97: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦ Pr♦♣s ♠♦♦ ♦rrs♣♦♥♥ts ❳ s♦r♦ s♦r sstrt♦s ♣♥♦s ♦♥♦r♠♦s ♣♦r ♠ts ♥♦s ② ♦♥ st♦s W ∗

sf

s t♠♣rtrs ♠♦♦ Tw ② rít ♣r♠♦♦ Tcpw ①♣rss ♥ ♥ s♦ Tcpw s ♥ ♦t s♣r♦r ♣r st t♠♣rtr ♣ ♠♦r ♦ ♥♦ s♣r ♥ st s♦ ❲ ♥ q ❳ ♥♦ ♠♦ sstrt♦ ② ♥q ❳ r ♦♥t♥♠♥t s♦r sstrt♦ ♣rtr ♥ t♠♣rtr ♠②♦r ♦ tr♣ t♦r apw q ♦rrs♣♦♥ ó♥ st ❬ ❪P❲ rr♥ ♦s rst♦s ♦t♥♦s ♠♥t ♥str♦s á♦s ② ♦s rst♦s q s ♦t♥♥s♥♦ ♦tr♦s ♥♦♥s ♥tr ♣ré♥tss s ♥ rr♥ ♦♥ r♦♥ t♦♠♦s st♦s t♦s

Pr♦♣ s W ∗

sf Tw ❬❪

Tw ❬ ❪ ❲ ❲ ❲ Tw ❬P❲❪ Tt

apw/kB [−1/2]❬P❲❪

Tcpw ❬P❲❪

s♦ró♥ ❳♥ó♥ ♥s♠ r♥ ♥ó♥♦

♦♦s ♦s rst♦s ♣r♦s ♥ s♦ ♦t♥♦s rs♦♥♦ s ♦♥s ♥ ♥ rt♥r rr

♦♥ s ♠♥t♥ ♦ ♥ú♠r♦ ♣rtís ♣♦r ♥ ár ♠ás t♠♣rtr

P♦r ♦tr♦ ♦ ♥ ♦s ①♣r♠♥t♦s ♦♥ ♥ ♦ ♣♦s rt♦ r♦ ♦♥♥♠♥t♦ st♥♦ ♥ ♦♥tt♦ ♦♥

♥ ♥t♦r♥♦ ♣ rs t♥t♦ t♠♣rtr ♦♠♦ ♣rsó♥ ♦ ♥ s t♦ ♣♦t♥ qí♠♦ s♥ ♠♣♦♥r

♥ rstró♥ s♦r n ♣r♠t♥♦ ♥ ♦ rrstrt♦ ♣rtís s ♦ s ♥t♦r♥♦ ♥ st út♠♦

s♦ s♦ st♦♥s t♦ ♦♥♥♠♥t♦ ♦ r♦ ♦r n ♥ú♠r♦ ♠♦ ♣rtís ♦

♦rrs♣♦♥rs ♦♥ q ♣♦s ♠s♠♦ sst♠ ♥♦ st rr♦ s r < n >≡ n = N/A

♥ st ♥♦ sq♠ tr♦ ♥ sst♠s rt♦s ♦♥ s ♦r ♣♦t♥ qí♠♦ s ♦♥s

tró♥ rs s ❬s ② ♣ ❪ s♦♥ rsts ♣♥♦ ♦r♠s♠♦ r♥

♥ó♥♦ st ♥③r s s♦♦♥s ♣r ρ(z) ② n ó♣t♠s

st ♠♥r ♣r ♥ ♦ ♦r r ♥♣♥♥t µ ♣♦t♥ qí♠♦ ♥s ♣ sr

♥rt♥♦

ρ(z) =1

Λ3exp

(

µ−Q(z)

νidkBT

)

.

s s♦♦♥s t♦♦♥sst♥ts s♦♥ ♦t♥s tr♥♦ st ①♣rsó♥ st ♥③r r♦ ♦♥r♥

rqr♦

♦ ♥ú♠r♦ ♣rtís ♣♦r ♥ ár s ♦t♥♦ ♠♥t ①♣rsó♥

Page 98: Adsorción de fluidos sobre sustratos sólidos, estudiada

150 180 210 240 270 300−12

−10

−8

−6

−4

−2

0

T [K]

∆µ

/kB

[K]

← Tt

Tc

Cw3

Cw4

Cw5

Cpw4

C

pw3

Cpw2

Cpw1

Xe

r í♥s ♣r♠♦♦ ♦rrs♣♦♥♥ts ❳ s♦r♦ s♦r rs♦s sstrt♦s rtr ② ③②s③ ❬❪ ♥ rá s ♣ ♦srr s í♥s ♦rrs♣♦♥♥ts s♦ró♥ s♦r s ♥ ♦♥ ír♦s s s ♥ sstrt♦ ♥s ♦♥ trá♥♦s s s♦s ♠rs ♦♥ r♦s ② s ♦rrs♣♦♥♥ts sñs ♦♥ r♦♠♦s ♦♦s st♦s á♦s r♦♥ r③♦s ♥ ♥tr♦ t♠♣rtr q s tr♣ sñ ♣♦r Tt st t♠♣rtr rít ♥ ♦♥ Tc

n =1

Λ3exp

(

µ

νidkBT

)ˆ L

0

dz exp

( −Q(z)

νidkBT

)

.

♦♥ µ sr ♣r♦ ♠♦♦ ♠♣♦ s ①♥ ♥♦s rst♦s ♦rrs♣♦♥♥ts s♦ró♥

❳ s♦r ♥ ♣r ♣♥ t♠♣rtr ♥ ♥ s ♣ ♦srr ♥

s♦tr♠ s♦ró♥ ♣r st t♠♣rtr í♥ só ♦rrs♣♦♥ s s♦♦♥s q s ♦t♥♥ t③♥♦

♦r♠s♠♦ r♥ ♥ó♥♦ ♠♥trs q r②s ♦rrs♣♦♥ s s♦♦♥s ♦t♥s ♠♥t ♦r♠s♠♦

♥ó♥♦ ♦s st♦s C1 ② C2 s♦♥ ♦s st♦s sts ♥ér♦s ♦rrs♣♦♥♥ts ♣ís s♦rs r♥ts

s♣s♦rs C1 st s♦♦ ♣í ♠ás

♠s rs s s♣r♣♦♥♥ s♦ ♥ ró♥ q ♥tr ♦s ♣♥t♦s s♣♥♦s S1 ② S2 ♦♥ dµ/dn = 0 s

r ♦♥ s s♦♦♥s s♦♥ ♥sts

r♥ ♥ó♥♦ ♣♦rt s♦♦♥s ♦♥ st r♥t③ ♦♥① ♥rí r FDF st ♣r♦♣

t♠é♥ s ① ♣♦r á♦s ♠r♦só♣♦s r♦♥s ♦s ♥ ♦♥t①t♦ ♥áss ♦♥♦♥s ♣r♦s

♥ ♦♥♥ó♥ ♦♥ ♥s ♣r♦♥ts PP r ♣♦r ♠♣♦ s s ❬ ❪

♥ t r í♥ rt ♦r③♦♥t ♦rrs♣♦♥ ♥ ♦♥stró♥ ① árs s ❬ ❪

st ♦♥stró♥ s ♣ r s♦♦ ♣r r ♣♥t♦s ♣r r ♦①st♥ ♥♦ s tr ♦♥

♦s rst♦s q s ♦t♥♥ s♥♦ ♥s♠ r♥ ♥ó♥♦ ①st ♦tr♦ ♠ét♦♦ ♥♦♠♥♦ ♦♥stró♥

① s t♥♥ts q ♠ás ♥t s rr♥

❯t③♥♦ s s♦♦♥s s ♠♥t r♥ ♥ó♥♦ s ♠♣♦s r s árs ♥♦rs ♥

♦ q ♥♦ ①st♥ t♦s ♥ ró♥ ♥♦ ♦♥① ♥tr S1 ② S2 ♣♦r s♦ ② q t③r ú♥ ♠ét♦♦

tr♥t♦

Page 99: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5−1

−0.9

−0.8

−0.7

−0.6

−0.5

−0.4

Γl

∆µ/k

B [K

]

Xe/Na T=245 K

C1

S1

S2

C2

M1 M

2

r s♦tr♠ s♦ró♥ ♦rrs♣♦♥♥t ❳ ♣♦st♦ s♦r ♥ ♣r ♣♥ ♥ t♠♣rtr ③②s③ ② rtr ❬❪ r só s♦♥ rst♦s ♦t♥♦s s♥♦ ♦s ♦r♠s♠♦s ♥ó♥♦ ② r♥♥ó♥♦ ♠♥trs q r r② s♦♥ rst♦s q s ♦t♥♥ s♦♠♥t ♦♥ ♥s♠ ♥ó♥♦ ♦s♣♥t♦s s♣♥♦s stá♥ ♠r♦s ♦♥ S1 ② S2 ♠♥trs q C1 ② C2 s♦♥ ♦s st♦s sts ♥ér♦s rt r②s ② ♣♥t♦s q ♥ ♦s st♦s M1 ② M2 ♥♦t ♦♥stró♥ ① árs s

♦♥stró♥ ① s t♥♥ts

♦s ♠ét♦♦s tr♥t♦s ♣r r③r ♥ ♦♥stró♥ ① stá♥ sr♣t♦s ♥ r♦s t①t♦ ♣♦r ♠♣♦

♥ ❬❪ ② ♥tt ❬❪ st út♠ rr♥ ♣rs♥t ♥ sí♥tss s ♣♦ss ♦♦s

♦s ♣r♦♠♥t♦s s s♥ ♥ ♦♥sr♦♥s ♥réts ♦♥t♥ó♥ ♠♦s ♥r ♠ét♦♦ t③♦

♥ st ss

♥rí r s s♦r s ♣ srr ♦♠♦

dF = d(E − TS) = −SdT + γdA+ µdN,

♦♥ E s ♥rí ♥tr♥ t♦t ② γ r♣rs♥t t♥só♥ s♣r ♦ ♥rí s♣r ♣♦r ♥ ár

t♠♣rtr T ② ár A ♦♥st♥t ♣♦♠♦s srr ♣♦t♥ qí♠♦ ♦♠♦

µ =

(

∂F

∂N

)

T,A

= f + n∂f

∂n,

st ♠♥r ♣♦♠♦s ①♣rsr t♥só♥ s♣r ♥ ♦r♠

γ =

(

∂F

∂N

)

T,N

=∂f

∂n−1= −n2 ∂f

∂n= n(f − µ) =

F − µN

A=

Ω

A= ω,

♦♥ Ω s ♣♦t♥ r♥ ♥ó♥♦

s ♦♥♦♥s qr♦ ♣r ♥ ♦ ♥ s♦♦ ♦♠♣♦♥♥t q ♣♦s ♥ t♠♣rtr ♥♦r♠ s♦♥ q

t♥t♦ t♥só♥ s♣r ♦♠♦ ♣♦t♥ qí♠♦ s♥ ♠♣♦s ♥♦r♠s P♦r ♦ t♥t♦ s ss ♦rrs♣♦♥♥ts

íq♦ ② ♣♦r ♣♥ ♦①str ♥ t♠♣rtr s ② s♦♦ s ♦♠♦ ♦ rqr ♣r

ú♥ ♣♦t♥ qí♠♦ qr♦ µe ♠s ss t♥♥ ♠s♠ t♥só♥ s♣r γe ♥ ♦trs ♣rs s

Page 100: Adsorción de fluidos sobre sustratos sólidos, estudiada

♠s ss ♣♦s♥ ♠s♠♦ ♦r ω sí s ♥ ♦♥♥t♦ (n, µ, fDF ) ♦t♥♦ ♥ st♦r ♦♥①♦ FDF

♦ r♦ ♦s st♦rs C1 − S1 ② S2 −C2 r s ♣ r ω ② ♦♥ st♦ tr③r ♦♥stró♥

① s t♥♥ts ❬ ❪ ♠ét♦♦ q ♣s♠♦s srr r♠♥t

♠ét♦♦ s t♥♥ts s s ♥ r s í♥s y t♥♥ts s rs f(n−1) ♣r ♠♦s st♦rs

C1 − S1 ② S2 − C2

♦r t♥♥t ∂f/∂n−1 s ω ♦①st♥

ωe =

(

∂f

∂n−1

)

nmin

=

(

∂f

∂n−1

)

nmax

,

y − f (nmin)

n−1 − n−1min

=y − f (nmax)

n−1 − n−1max

.

sts ♦♥s ♦♥♥

y = f (nmin) +

(

∂f

∂n−1

)

nmin

(

n−1 − n−1min

)

= f (nmax) +

(

∂f

∂n−1

)

nmax

(

n−1 − n−1max

)

,

s♥♦ s s ② ♣♦♠♦s srr

y = µ (nmin) + ω (nmin)n−1 = µ (nmax) + ω (nmax)n

−1 ,

s ♦♠♥ó♥ ♣♦t♥ qí♠♦ ② ♣♦t♥ r♥ ♥ó♥♦ ω ♦rrr ♣r s ♦s ss ♥

♦①st♥ ♥♦ s í♥s t♥♥ts ♦♥♥ q

y = µe + ωen−1 .

st ♠♥r s ♣♥ ♦t♥r t♥t♦ ♣♦t♥ qí♠♦ ♦♠♦ r♥ ♣♦t♥ ♦rrs♣♦♥♥ts qr♦

µe ② ωe s ♦♠♦ s ♥ss ♦rrs♣♦♥♥ts ♥ s ss ♥ ♦①st♥ nmin ② nmax

♥ ♠r♦ st ♣r♦♠♥t♦ ♥♦ s ♠ás ♣rs♦ ♣r tr♠♥r tr♥só♥ s st ♦ s♦

♥③♦ ♣♦r s♦ ② ♦♦r♦rs ♥♦ st♥ s♦r ❬❪

❯♥ ♠♥♦ tr♥t♦ ♣r tr♠♥r ♦①st♥ ♦♥sst ♥ ♣rtr µ ② ω ♦♠♦ ♥♦♥s ♥ú♠r♦

♣rtís ♣♦r ♥ ár ♦ rr ω s µ ② st ♠♥r tr♠♥r ♦r sts rs

♦rrs♣♦♥♥ts ♦①st♥ ss ♥ qr♦ µe ② ωe r ♣♦r ♠♣♦ ❬❪ s

♦♥str♦♥s ♠♦strs ♥ ❬❪ ② ❬❪

♥ ♣♥t♦ r ♠r♦ ♦♠♦ Mcross tr♠♥ t♥t♦ µpw(T ) ♦♠♦ ωpw ♦rrs♣♦♥♥t

♦①st♥ ss ♥ st ♣♥t♦ r ② ♥ qr rtríst♦ ♥ tr♥só♥ ♣r♠r ♦r♥

♦♠♦ sr s s♣rr ♦s ♦rs µpw(T ) ♥ s s ② ♦♥♥

♦s st♦s ♦ r♦ í♥ C1 −Mcross − C2 s♦♥ sts ♠♥trs q ♦s ♦rrs♣♦♥♥ts M1 − S1 ②

S2 −M2 s♦♥ ♠tsts ú♥ ♥s♥ ② ♦♥ ♣ít♦ ❬❪ ♦s st♦s ♠tsts ♣♥

♣rr ♥ ①♣r♠♥t♦ s s ♣r♦ ♦♥ s♥t ♦ ♠♥r ♥♦ ♣r♠tr q sst♠ ♥

♥ st♦ qr♦ tr♠♦♥á♠♦ st

Page 101: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.9 −0.8 −0.7 −0.6 −0.5 −0.4

−1.498

−1.496

−1.494

∆µ/kB [K]

ω/k B

[K/n

m2 ]

Xe/Na T=245 K

C1

S1

S2

C2

Mcross

r r♥ ♣♦t♥ ♣♦r ♥ ár ♥ ♥ó♥ ♣♦t♥ qí♠♦ r♦ ♣r ❳ s♦r♦ s♦r ♥ ♣r ♥ t♠♣rtr ③②s③ ② rtr ❬❪ ♦♦s ♦s t♦s rá♦ r♦♥ ♦s ♥ ♦r♠s♠♦ r♥ ♥ó♥♦ r q ♦♥t♥ ♦s ♣♥t♦s C1 ② S1 ♦rrs♣♦♥ ♣ís s ♦s♦rs s♦r ♣r ♠♥trs q q ♦♥t♥ C2 ② S2 st tr♠♥ ♣♦r ♣ís rss ♣♥t♦ r ♥♦ ♦♥ Mcross ♥t ♦①st♥ ♠s ♣ís

s♠♥ s♦r s♦ró♥

s♦ró♥

str♦s á♦s ♣r♥ ♦♦ ♣♦r ♥ ♥ r♦ ♦♥ ♦s rst♦s ①♣r♠♥ts ♦t♥♦s

♣♦r ss t♥ ② ♥ ❬❪ q ♦♥tr♥ s ♦♥s♦♥s s q s ♥♦ s ♠♣♥ s♠♦♥s

♥♠érs r♣♦rts ♥ r♦ s s ❬ ❪

♠♦s ♣♦♦ ♣♦♥r ♥ ♥ ♥ tr♥só♥ ♣r♠♦♦ ♥ s♦ sst♠ ♥ st s♣t♦

①st♥ t♦s ♠♣ír♦s ② st♠♦♥s tórs q ♦♥r♠♥ ♠♦♦ ♣♦r ♣r♦ st st ♠♦♠♥t♦

♥♦ s r♣♦rtr♦♥ á♦s q ♣♦♥♥ ♥ ♥ ①st♥ ♥ tr♥só♥ ♣r♠♦♦

Pr sst♠ r♥ ♦ q s ♦tr♦♥ ♥ st♦s ♦♥ t③♥♦ ♥♦♥s ts

♥str ♣r♦♣st ♦♥r♠ ①st♥ ♥ tr♥só♥ ♣r♠♦♦ t ♦ ♣r♥ á♦s

r ♣♦r ♠♣♦ ❬❪

♠é♥ ♦t♠♦s ♥ t♠♣rtr ♠♦♦ r♥ tr♣ ♥ ♦♥ t③ó♥ ♦s ♥♦♥s

ts ♣r♦♦ r♥s á♦ ♥♠ér♦ ♦r st t♠♣rtr st ♥ ♥ r♦ ♦♥

♦t♥ ♣♦r rtr♦♦ ② ♦♦r♦rs ❬❪

♣♦rt♠♦s á♦s s♦r sst♠ st ♠♦♠♥t♦ ♥♦ ①st♥ ♦tr♦s rst♦s s♦r st sst♠

t♠♦s ♥ ♥ st ♣r ♥s s♦r s♦r ♥ sstrt♦ t♥ rt ♦♠♦ ♥ st

s♦ ♦s ♦rs q ♦t♠♦s s ♦♠♣rr♦♥ ♦♥ ♦s ♦s ♥ s♠♦♥s r③s ♣♦r ♦♥ ②

♦♦r♦rs ❬❪

Page 102: Adsorción de fluidos sobre sustratos sólidos, estudiada

s ♠♣♦rt♥t ♥♦tr q ♠♥t s♠♦♥s ♥♦ s ♥ ♣♦♦ ♦t♥r r♠♥s ♣r♠♦♦ ♣r

t♠♣rtrs r♥s rít ❬❪

s♦ró♥ r

♥ st♦ s♦ró♥ r s♦r 2 ♥♦♥tr♠♦s strtrs s♦tr♠s s♦ró♥ ②s ♦r♠s

s♦♥ s s♣rs r s ②

Pr sst♠ r ♦♥ ♥♦ ①st♥ ♣rát♠♥t r♣♦rts s♦r st♦s ♠♦♦ ♥♦♥tr♠♦s q ①st

♠♦♦ r♥ ♦ q sñ♥ ♥♦s rst♦s ♦t♥♦s ♠♥t s♠♦♥s ♥♠érs

s ♥ ♦s ♦rs q rr♦♥ s s♠♦♥s s♦♥ t♦♠♦s ♦♠♦ rr♥ ♥ ♥♦s s♦s ♦

♠♦ ♣♦r ♠♣♦ ♥ sst♠ ❬ ❪ s ♣r♦♥s ♥♦ st♥ t♦♦ ♥ ♦s t♦s

①♣r♠♥ts

str♦s rst♦s s st♥ ♦s ♦rs ①♣r♠♥ts ♦s s ♣r♦♣s ♠♦♦ t♥t♦ ♣r 2

❬❪ ♦♠♦ ♣r ❬❪

♦sr ♥ s♦ ♣ró♥ ♥ strtr s♠♦♥♦♣s ♦♠♣♦rt♠♥t♦ s♠r r♣♦rt♦

♥ trtr ❬❪ ♥♦ s st s♦ró♥ r s♦r rt♦ ♦♥ ♥t♥s ♥tró♥ s t♥

♥t♥s ♦♠♦ sst♠ r

s♦ró♥ ❳

str♦ ♥♦♥ ♣r♠tó r♣r♦r ♥♦ s♦ ♣♦t♥s rsts strtr í♥s ♣r♠♦♦

s♦r s q s t♦r③♦ ♥ ♦tr♦s st♦s s♦r t♠ s ❬ ❪

♥♦♥tr♠♦s ♥ tr♥só♥ ♠♦♦ ♣r sst♠ ❳ ♣r ♥ t♠♣rtr ♠♥t ♥r♦r ♦s

② ♥ í♠t t♠♣rtr rít ♣r♠♦♦ ♥ ♦s

♥ s♦ ❳ ♦t♠♦s ♥ t♠♣rtr ♠♦♦ ♦r♥ ② ♥ í♠t ♣r Tcpw

Pr sst♠ ❳ t♠♣rtr ♠♦♦ q ♦t♥♠♦s s st♥t r♥♦ q ♣r

Tw = 201K ♦♠♦ s ♣ r ♥ r♦ ❬❪ st ♦r st ♣♦r ♦ ♦t♥♦ trés

s♠♦♥s ♥♠érs ♦♥ ♥ sts s♠♦♥s s ♦t♦

Pr sst♠ ❳ ♠♦s ♥♦♥tr♦ r♠s s♦tr♠s s♠rs s r♣♦rts ♥

❬❪

r♥♦ ♦♥ sst♠s rt♦s ♦♥ s ♥ ♣♦t♥ qí♠♦ ② ♥ t♠♣rtr s ♦s ♠s♠♦s

rst♦s q ♥♦ s tr ♦♥ sst♠s rr♦s ♦♥ n ♣r♠♥ ♦ s ♣♥t♦ st ♣r

t♦ ♦ ♠♥♦r ♦st♦ ♦♠♣t♦♥ q ♥s♠♥ ♦s á♦s s ♦♥♥♥t trr ♦♥ sst♠s rr♦s

rs♦♥♦ s s ♥ ♠r♦ ♦r♠s♠♦ ♥ó♥♦

Page 103: Adsorción de fluidos sobre sustratos sólidos, estudiada
Page 104: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♥♦ r♥rs ♣♥s

♥③ s♦ró♥ r ② ❳ ♥ r♥rs ♣♥s ♦♥♦r♠s ♣♦r sstrt♦s ♠ts ♥♦s

② 2 q ♣r s♦ ♣rs s ♣rs♥t♥ ♦s rst♦s rs♦r s ♦♥s

♣r sst♠s t♠♣rtr ♦♥st♥t t♥t♦ rr♦s ♦♥ ♥ú♠r♦ ♣rtís ♦ ♦♠♦ rt♦s sst♠s q

♣♥ ♥tr♠r ♣rtís ♦♥ ♥ rsr♦r♦ ② ♣r ♦s s s ♠♥t♥ ♦ ♣♦t♥ qí♠♦

st♥ s ♣r♦♣s r♦♥s ♠♦♦ ② ♣r♠♦♦ s s♣rs q ♦♥♦r♠♥ r♥r s

♣r♦♣s s ♣ís s♦rs ② r♣tr s♠trí s s♦♦♥s

♣♥t ①st♥ ♥ ró♥ ♥tr s♠trí ♣r♠♦♦ ② ♠♦♦ ♥♥tr q ♦ rts

♦♥♦♥s ♥t♦ ♦s st♦s s♠étr♦s ♣♥ ♦①str st♦s s♠étr♦s

♦s á♦s r♦♥ r③♦s ♥tr♦ ♦♥t①t♦ ♥ ♣r♦①♠ó♥ ② ♥tró♥ ♦s

♦♥ sstrt♦s stá r♣rs♥t ♣♦r ♣♦t♥s rsts sr♣t♦s ♥ ♣ít♦s ♥tr♦rs s♦ ♣r s②st♠

r2 q ró ♥ trt♠♥t♦ ♣rtr

s♠♥ ♥t♥ts

s ♣r♠rs ♥st♦♥s s♦ró♥ ♦s s♠♣s ♥ r♥rs ♣♥s r♦♥ r③♦s ♣♦r ♥ ♥ ②

♦♦r♦rs q♥s ♥③r♦♥ st s sst♠s ♥♦ ♦ s♠♦♥s q í♥ s♦ ♥á♠

♦r r ♣♦r ♠♣♦ s s ❬ ❪ st♦s á♦s r♦♥ r③♦s ♥ t ♦r ②♥♠s

Pr♦ss♦r P s♣♠♥t ♦♥str♦ ♣r t ♥

♥tr ♦s ñ♦s ② ♥ t ❬ ❪ ② ♠r t ❬ ❪ ♣♥ ♦s rst♦s ss st♦s

♥ s♦s ♥áss s s♠í q s ♠♦és ♦ ♥trtú♥ ♥tr s ② ♦♥ ♦s át♦♠♦s q ♦♥stt②♥ s

♣rs r♥r ♠♥t ♣♦t♥s t♣♦ s ♣rs s r♥rs st♥ st♥s ♥

á♠tr♦s ♠♦rs st♥ q s ♦♥sr s♥t ♦♠♦ ♣r s♣rr s ♥tr♦♥s ♥tr s

♠♦és ♦ s♦rs ♥ s ♣rs ♦♣sts r♥r

♥ s s♠♦♥s t③s ♣♦r st♦s t♦rs s ♥③ó ♥ sst♠ ♦♥♦r♠♦ ♣♦r ♦s t♣♦s ♣rtís

t ♠♥r q rt ♥t ♣rtís ♥ s♣ ♦r♠♥ sstrt♦ só♦ ② ♥ ♠♥♦r ♥t

Page 105: Adsorción de fluidos sobre sustratos sólidos, estudiada

−8 0 8

0.4

0.8

1.2

z*

ρ*

−8 0 8

0.4

0.8

1.2

z*

ρ*

r ♥ ♠s rs s ♦sr ♦♠♦ s ♠♦ ♥s ♥ ♦ s♦r♦ ♥ ♥ó♥ st♥ s ♣rs st♦s rá♦s ♦rrs♣♦♥♥ s s ② ❬❪ ♦♥sr q s ♠♦és ♦♥trtú♥ ♥tr s ② ♦♥ ♦s át♦♠♦s q ♦♥stt②♥ s ♣rs r♥r ♠♥t ♣♦t♥s t♣♦ st♥ st ♠♥s♦♥③ ♦♥ á♠tr♦ ♠♦r t♠ñ♦ s ♠♦és ♦ σff ♥ rá♦ ③qr ♦s rst♦s q ♦rrs♣♦♥♥ W ∗

sf = ♠str♥ ♥ s♦ó♥ st q ♥ st s♦ ♣r

s♣és 104 ♣s♦s á♦ r③♦s ♦♥ ♣♦str♦r qr♦ s í♥s rts ♠ás rss♦rrs♣♦♥♥ sstrt♦ ② s s ♥♥ ♦♥♦♥s ♦♥t♦r♥♦ ♣rós ♥ rá♦ r s♦sr ♥ s♦ó♥ r♠♥t s♠étr ♦t♥ ♣r W ∗

sf = st ♣r st ♣r s♣és 104

♣s♦s á♦ ♣♦str♦rs qr♦

♦tr s♣ ♦♥♦r♠♥ ♦ s♦r♦ st ♦r♠ s str♦♥ ♥ó♠♥♦s ♠♦♦ r♥♦

ró♥W ∗

sf =Wsf/εff ♥ ♥tr♦r♠♥t ♥r♠♥t♥♦ ♣t♥♠♥t ♦r W ∗

sf ♥ s s♠♦♥s

♥♠érs s ♥♦♥trr♦♥ s s♥ts st♦♥s

Pr ♦rs ♦s W ∗

sf ♣r ♥s ♣rs♥t ♠s♠ s♠trí q ♣♦t♥ ♥tró♥

sstrt♦♦ s r ♣r r s♠étr♦ ♥ st s♦ ♣rí♥ ♦s ♥trss só♦♣♦r ❱ ② ♦s

íq♦♣♦r ❱ ♦rrs♣♦♥♥ts s♥ tr♥só♥ ♠♦♦

♥ s♦ ♦rs ♥tr♠♦s W ∗

sf s♦ó♥ ♣♦í r♦♠♣r ♦♥ s♠trí ♣♦t♥ ①tr♥♦ ♣r

♥♦ ♥t♦♥s ♥ ♣r s♠étr♦ stó♥ r t q s ♣rs♥t ♥ ♥trs só♦íq♦ ♦tr

❱ ② ♥ trr ❱ ♠♦♦ r s♦♦ ♣r ♦♥sst♥t ♥ ♣ró♥ ♥ ♣óst♦ ♦ s♣s♦r

♣r s♦r ♥ s ♣rs ♠♥trs q ♣♦r s ♦♥♥tr s♦r ♦tr ♣r

s ♦♥t♥ ♠♥t♥♦ ♦r W ∗

sf ♦s ♣rs ♦í♥ ♣rs♥tr s♠trí ♣♦t♥ ♥tró♥

sstrt♦♦ ② ♣rí♥ ♦s ♥trss ② ♦s ❱ ♥ st út♠♦ s♦ ♦ ♠♦ ♦♠♣t♠♥t ♠s

♣rs

♥ s ♠str♥ ♠♦♦ ♠♣♦ ♦r♠ st s ♣rs ♦t♥♦s ♦♥ ♦s á♦s

♠♥♦♥♦s ♥á♠ ♦r r ❬❪

t♦r s♠trí ♣♥ ás♠♥t ♥ s t♥s♦♥s s♣rs q ♣r♥ ♥♦ íq♦

♥trtú ♦♥ s ♣rs ❬❪ ú♥ ② ❨♦♥ ♣♦♠♦s srr ①s♦ ♥rí r ♣r s♠étr♦

♦♠♦

γtot = γSL + γLV + γSV = 2γSL + γLV (1 + cosθ) ,

Page 106: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♥s ♦ s♦r♦ ♥ ♥ó♥ st♥ ♥ s ♣rs ♥ r♥r ♦r♠ ♣♦r ♣rsé♥ts st rá♦ ♦rrs♣♦♥ ❬❪ st s♦ ♦♥ W ∗

sf = ♦rrs♣♦♥ ♥stó♥ ♠♦♦ ♣r ♦s t♦rs ♥ rá♦ ♥r♦r ♦♠♣r♥ ss rst♦s ♦t♥♦s ♠♥t ♦r♠s♠♦ r í♥ ♥ ♦♥ ♦s ♦t♥♦s ♥ ♦tr♦s tr♦s ♠♥t s♠♦♥s ♦♠♣t♦♥s r③s ♠♥t ♥á♠ ♦r r s s ❬ ❪ ♥ ♣rt s♣r♦r rá♦ s ♣♦srr ♣r ♥ s t♦t

♦♥

cosθ =γSV − γSL

γLV< 1.

s ♥r♠♥t tró♥ s ♣rs

γSV − γSL → γLV =⇒ cosθ → 1 ,

♦♥ ♦ sst♠ r③ ♥ tr♥só♥ ♣s♥♦ s♦ó♥ s♠étr s♠étr ♦♥

γtot = 2(γSL + γLV ) .

♥ st s♦ ♠s ♣rs r♥r s♦♥ ♠♦s ♣♦r íq♦

P♦str♦r♠♥t ♦s ♥áss ♥ ♥ st♦s ❱③♦ ② r③♦♥ ❬❪ ♥ ♥t ①st♥

♣rs s♠étr♦s ♦t♥♦s ♥ ♦♥t①t♦ ♥ ♣r♦①♠ó♥ ♥♦♠♥ q ② ♥♦s

♠♦s rr♦ ♥ ♣ít♦ ♦rrs♣♦♥ t rr♥ ♥ ♦♥ s ♦♠♣r♥

♦s ♣rs ♦t♥♦s ♠♥t s♠♦♥s ♥♠érs ♦♥ ♦s q s r♥ t③ó♥ ♦r♠s♠♦

st♦s á♦s ♦rrs♣♦♥♥ W ∗

sf = ♣r ♦t♥♦ ♣♦r ♠♦s ♠ét♦♦s s r♠♥t s♠étr♦ ②

♦rrs♣♦♥ ♥ stó♥ ♠♦♦ ♣r ♦♥ ♥ ♥trs ② ♦tr ❱ ♥ ♣r r r♥r

♦s á♦s r♦♥ r③♦s ♥ ♦♥t①t♦ ♦r♠s♠♦ ♥ó♥♦

♥ ♥ tr♦ ñ♦ r ② ö♥ ❬❪ r③♥♦ s♠♦♥s ♦♥t r♦ ② á♦s ♥♦♥

trr♦♥ q ♥ s♦ r♥rs rts ♥s ♦♥ ♦s t♠é♥ ♣♥ ♣rs♥trs ♣rs s♠étr♦s

Page 107: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥t♠♥t r♠ ② ♥st♥ ❬❪ ♠♦strr♦♥ q ♦ rts r♥st♥s s♦♦♥s s♠étrs ♣♦rí♥

♦rrr ♥♦ r s s♦r♦ ♥ r♥rs rrs 2 ♠ás ②s♦ Ptr② ② ♦♦♦s ❬❪

s♦♥ ② ♦♥s♦♥ ❬❪ r♣♦rtr♦♥ ①st♥ ts s♦♦♥s ♦t♥s ♠♥t s♠♦♥s ♦♥t r♦

② ♥tr♦ ♠r♦ ♦rí ♥á♠ ♠♣♦ ♦ rs♣t♠♥t

♥st♦♥s ♣r♦♣s

♠♦s ♥③♦ s♦ró♥ rs♦s ♦s ♥♦s r ② ❳ t♥t♦ ♥ r♥rs rrs s r ♥s

♦♥ ♥ ♥t ♠♦és ♦♠♦ rts ♦♥ r♥r s ♠♥t♥ ♥ ♦♥tt♦ ♦♥ ♥ rsr♦r♦

♣rtís ♦ ♠♥r t q ♣♦t♥ qí♠♦ s ♠♥t♥ ♦ ♦♥s♥t♠♥ts ♦♥s

r♦♥ rsts ♥tr♦ ♦♥t①t♦ ♦s ♦r♠s♠♦s ♥ó♥♦ ② r♥ ♥ó♥♦ sr♣t♦s ♥tr♦r♠♥t

♠♥t ①♣♦♥♠♦s ♦s rst♦s st♦ s♦ró♥ r ❳ ② ♥ r♥rs ♣♥s rrs

♥ srr♠♦s ♦♠♣♦rt♠♥t♦ ❳ ② ♥ sst♠s rt♦s

♦ ①♣rs♦ ♥ ♣ít♦ s ♦♥s ♣r ♣♦t♥ qí♠♦ ② ♥s ❬s ② ❪

s ♦t♥♥ ♥srt♥♦ ♥ Q ❬ ❪ ♣♦t♥ ♥tró♥ sstrt♦♦ ♦ r L q ♥

s♦ ♥ ♣r r t♠ñ♦ ♦♥ s rs♦í sst♠ ♦r s ♥♦ r♥r ♦♠♦

♥ts s♦ó♥ s tr♠♥ tr♥♦ s ♦♥s st ♥③r ♥ tr♠♥♦ ♦r ♦♥r♥

♦♥♥♠♥t♦ ró♥ ♥ r♥rs ♣♥s rrs

♥ st só♥ ♣r♠r♦ ♥③♠♦s r ♥ s ♦♥s♦♥s ♣rs♥ts ♣♦r r♠ ② ♥st♥

♥ s tr♦ r♥t s♦r ♥♦ r♥rs 2 ❬❪ ♦♥ st ♥ ♣♠♦s ♠s♠ q t③r♦♥

♥ s st♦ st♦ s ♦♥ ♣♦t♥s é♥t♦s ♦s ♦♣t♦s ♣♦r s♦s t♦rs ♦ ♣rs♥t♠♦s

♥ rst♦ ♣r sst♠ r2 ♦t♥♦ ♦♥ ② ♥ ♣♦t♥ Usf (z) rst

♦♥t♥ó♥ ①♠♥♠♦s ♣♦s ♦t♥r s♦♦♥s s♠étrs ♣r ♣rs r s♦r♦s ♥

r♥rs ♠ts ♥♦s t③♥♦ t♦rí ② ♣♦t♥s rsts ❩

r ♥ r♥rs ♥ír♦ ró♥♦

♥ s rtí♦ r♠ ② ♥st♥ ❬❪ r♣♦rt♥ ①st♥ ♣rs ♥ss q r♦♠♣♥ s♠trí

♣♦t♥ q r♥ s ♣rs s♦r ♦ ♣♦t♥ ♥tró♥ sstrt♦♦ q t③♥ st♦s

t♦rs s q ♦♣♦rt♥♠♥t ♥♦s ♠♦s rr♦ ♥ ♣ít♦ ♥tr♦r ❬ ❪

♥ tr♦ ❬❪ ♦s t♦rs ♥③r♦♥ ♥ r♥r ♣♥ rr ♥♦ L ♦♥♦r♠ ♣♦r ♦s ♣rs

é♥ts 2 ♣sr♦♥ s♥t ♣♦t♥ ♣r ♥tró♥ ♦ ♦♥ s ♣rs

Page 108: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♦r♠ r♥r t③ ♣♦r r♠ ② ♥st♥ st r ♦rrs♣♦♥ ❬❪ qíW1 ② W2 ♦♥stt②♥ ♦s ♣rs sós 2 s♣rs ♣♦r ♥ st♥ L ♥ st rá♦ q ♦♦r♥ ③ ♥ st ♦ σfw1 ② σfw2 r♣rs♥t♥ ♦s á♠tr♦s s ♠♦és ♣r ♦♥srs ♦♠♦srs rís ♠♥trs q σff r♣rs♥t á♠tr♦ tó♠♦ ♦ ♦ s ♠s♠s ♦♥sr♦♥s r♥r s ♥♥tr rr ♥ ss ①tr♠♦s

Usf (z) = Usf1(z + σsf ) + Usf2(lw − z + σsf ) ,

♦♥ lw = L− 2σsf s ♥♦ t♦ r♥r ② s ♦♥tr♦♥s ♣r t♥♥ ♦r♠

Usfi(zi) =2π

3εeff

[

2

15

(

σsfzi

)9

−(

σsfzi

)3]

.

sí ♥ st♥ σsf s ♣rs rs q ♦♥♦r♠♥ r♥r ♥tr♦í♥ ♥ ♣♦t♥ ♥♥t♦ r♣s♦

♥ tr♥sr♠♦s tr♦ st♦s t♦rs ♦s ♣rá♠tr♦s r sstrt♦♦ q

♣r♥ ♥ st ♣♦t♥ εeff =Wsfρsσ3sf ② σsf ♥ Wsf/kB = 153 ρ∗s = ρsσ

3sf = ② σsf = ♥♠

♥ st ♦♥t①t♦ ♠♦s ♥♦tr q ♥ ♥ tr♦ s♦♥ ② rts ❬❪ s ♣r♦♣♦♥ q st ♣♦t♥

t♦♠ ♦r♠

Usf (z) = Usf1(z +σsf2

) + Usf2(lw − z +σsf2

)

st♦ s ♦③♥♦ r♣só♥ ♥♥t ♥ st♥ ♦rrs♣♦♥♥t σsf/2 s ♣r r r♥r

s♥♦ ♥t♦♥s ♥♦ t♦ r♥r lw = L− σsf

♥ s ♠str♥ ♠♦s ♣♦t♥s ♥ ♠s♠ rá ♣rs♥t♥ ♦s st♦♥s q ♦rrs♣♦♥♥

♦s ♣♦ss ♠♦♦s D r♣rs♥t st♥ s ♠♦és ♦ át♦♠♦s ♦ ♥ s ♣rs

♦t♥♠♦s

D =

z + σsf (BR)

z +σsf

2 (NG) ,

Page 109: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7 8 9 10−400

−300

−200

−100

0

100

200

ξ/10 [nm]

Usf

[K]

Ar/CO2

o minimum

σsf

σsf

/2

< >

< >

r P♦t♥s ♥tró♥ ♥tr r ② 2 ♥ ♥ó♥ st♥ ♥tr♠♦r ξ ③②s③ ② rtr❬❪ r só s ♦rrs♣♦♥ ♦♥ ♠♦♦ t③♦ ♣♦r r♠ ② ♥st♥ ♥ st s♦ s ♦♦ ♥st♥ σsf ♣r r r♥r ♥ r♣só♥ ♥♥t ♣r t ♠♣♥♦ st ♠♥r q ♣♦t♥ ♥ s ♠í♥♠♦ ♥ ♠♦♦ s♦♥ ② rts r r② ♣♦t♥ ♥♥t♦ ♦♦♦♥ σsf/2 ♣r♠t ♥③r s ♠í♥♠♦

q r♠♦s q ♦♥♥ r♥ts ♣r♦♣s ♠♦♦

st rs♣t♦ s ♣ ♦♥sttr q t♥ ♥ ♥t ♦♠♣♦♥♥t s♦t r♣só♥

tér♠♥♦ (σsf/z)9 ♣♦t♥ ♥trs q ♠♦♦ ♦rt ♣♦t♥ ♥ts q st

♠í♥♠♦ s ♥③♦ st♦ ♣r♦ r♥s ♠♣♦rt♥ts ♥ ♣r ♥s ♦ ♠♦♦

q ♥s ♥♦ s ♥ ♥ ♥ z = 0 ♥ ♥ z = lw ♦ q ♥ q ♦ st ♥ ♦♥tt♦ ♦♥

♣r rí q ♦♥♦r♠ r♥r ♠♥trs q ♠♦♦ ♦♥ q ♦ s ♦♥♥tr ♦r♠♥♦

♥ ♣r♠r ♣ q s ♠♥t♥ s♣r ♣r

♦ q st♦s ♦s ♠♦♦s s ♣rs♥t♥ ♦♠♦ ♣♦ss ♥♦s♦tr♦s ♥③r♠♦s ♠♥t ♥str ♣r♦♣st ♥

sq♠ q ♦♥t♠♣ s ♦s st♦♥s Pr ♦ ♣♦t♥ ♦♥ q trr♠♦s srá srt♦ ♦r♠

Usf (z) = Usf1(z +σsfν

) + Usf2(lw − z +σsfν

)

♦♥ ♣rá♠tr♦ ν t♦♠rá ♥t♦♥s ♦rs ♥tr ②

s♦♠♦s s ♦♥s ♥tr♦ ♦r♠s♠♦ ♥ó♥♦ tr♥♦ ♦♥ s rs ♠♥s♦♥s

z∗ = z/σff ρ∗ = ρσ3ff ② T ∗ = kBT/εff

Pr♠r♦ st♠♦s ♣r♦♠ ♦♥ ♣♦t♥ q t③r♦♥ rs♦♥♦ s ♦♥s ♥ ♥ r♥r

15σff ♥♦ ♥ t♠♣rtr t♠♣rtr ó♥ ♥♦r♠ T ∗ = ♣r r♥ts ♦rs

♥s ♠ ρ∗av = nσ3ff/lw = n∗/l∗w ♦s ♣rá♠tr♦s ♣♦t♥ ♥tró♥ rr s♦♥

εff = ② σsf = ♥♠ ♥♦ st r♥r ♥③♦ ♣♦st♥♦ ♥ ♥ú♠r♦ ♦ át♦♠♦s

r

ró♥ ♥tró♥ ♥tr♦ [0, l∗w] s ó ♥ ♥ qs♣♦ q ♣r♠t s♦♥s ♣♦r á♠tr♦

tó♠♦ st♦ s ♥♦ s ♠ás ♥♦ q t③♦ ♥ ♠♦♦ s s♦♦♥s s ♣t♥ s♦♦ s ♥♦r♠

rt r♥ ♥tr ♦s s♦♦♥s ♦♥sts s ♠♥t♥ ♣♦r ♦ 10−15

♥♦♥tr♠♦s q ♣♦r ♦ ♥ tr♠♥♦ ♦r ♥s ♠ ♥ st s♦ ♣r♦① ♦r q

Page 110: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8−12.2

−12

−11.8

−11.6

−11.4

−11.2

−11

−10.8

ρ*av

µ/k BT

T = 87 K lw

= 15 σff

Ar/CO2

r P♦t♥ qí♠♦ ♥ ♥ó♥ ♥s ♠ ③②s③ ② rtr ❬❪ r♥r 15σff ♥♦ st♦♥stt ♣♦r ♦s ♣rs é♥ts 2 ♦ s r ♥ t♠♣rtr r só ♦rrs♣♦♥ st♦s ♥♠♥ts q ♣♦s♥ s♠trí ♣♦t♥ ①tr♥♦ ♣♦t♥ sstrt♦♦ í♥ r②♦rrs♣♦♥ st♦s ♥♠♥ts q ♦♥ s s♠trí ♦♠♦ s ♦♠♥t ♥ t①t♦ s s♦♦♥s s♠étrss ①t♥♥ ♥ ♥ r♥♦ ♥ss ρ∗sb1 < ρ∗sb < ρ∗sb2 ② ①t♥só♥ ♣♥ t♠♣rtr r ♣♥t♦s ② r②s st s♦ s♥ ♦♠♣t ♠♦♦ ② ♦rrs♣♦♥ ♥ tr♥só♥ s ♣r

♥♦♠♥r♠♦s ρ∗sb1 ♦s ♣rs ♥s ♠♥t♥♥ s♠trí ♣♦t♥ ①tr♥♦ ♣♦t♥ ♣r♦ ②

♠ás sr sts ♦rrs♣♦♥♥ st♦s ♥♠♥ts

s ♠♥t ♦r ♥s ♠ ♣r♥ ♦♠♦ s♦♦♥s ♥♠♥ts ♣rs q r♦♠♣♥ ♦♥

s♠trí ♣♦t♥ ①tr♥♦ st út♠ stó♥ s s♦st♥ st q s ♥③ ♥ ♦r tr♠♥♦

♥s ♠ q ♥ ♥str♦ s♦ ρ∗sb2 = ♣r♦ st ♦r st♦ ♥♠♥t r♦r

s♠trí ♣♦t♥ ①tr♥♦ qr s t♠♣rtr

❱ r q ♥♦♥tr♠♦s ♥ r♥♦ ♥ss ♠s

ρ∗sb1 < ρ∗sb < ρ∗sb2

t q ♥ t♠♣rtr s♦ó♥ ♥♠♥t r♦♠♣ ♦♥ s♠trí ♣♦t♥ ①tr♥♦ q s ♣

♦ ♠é♥ ♦♠♣r♦♠♦s q s ♠♥t♠♦s t♠♣rtr st r♥♦ s t♦r♥ ♠ás str♦

♥ s ♠str ♦♠♦ ♠ ♣♦t♥ qí♠♦ ♥ ♥ó♥ ♥s ♠ sts s♦♦♥s

♦rrs♣♦♥♥ts ♥ st♦ ♥♠♥t ♦♥ s♠trí r♦t ♣r♥ ♦♥ ♣♦t♥ qí♠♦ ♣rs♥t

♥ró♥ ♦♠♦ s ♣ r ♥ rá ♥ r♥♦ s♠trí ♥ ú♥♦ ♦r ♣♦t♥ qí♠♦ q♥

s♥♦s ♠ás ♥ ♦r ♥s ♠

♥ s ♣♥ ♦srr ♣rs ♥s ♦rrs♣♦♥♥ts r ♥ r♥rs ♣rs 2 ♦♥

ss r♥ts s♠trís st♦s ♣rs ♦rrs♣♦♥♥ ♥ stó♥ ♥♦ ♠♦♦ ♠♦♦ ♥ s♦ ♣r ②

♠♦♦ s ♦s ♣rs q ♦♥♦r♠♥ r♥r ② s ♦rrs♣♦♥♥ ♦♥ ♦s r♣♦rt♦s ♥ s s ②

❬❪ ♦t♥♦s ♠♥t ♥á♠ ♦r ♦♠♦ s ♠str ♥ r ♣r ♦ r♦♠♣ ♦♥

s♠trí ♣♦t♥ ①tr♥♦

♥ t s ♠str♥ ♣r r♦s ♦rs ♥s ♠ s ♦rrs♣♦♥♥ts ♥rís rs q ♠♦s

♦t♥♦ sí ♦♠♦ s ♦t♥s ♣♦r r♠ ② ♥st♥ sr♥♦ ♦♠♥ q ♦♥t♥ s s♦♥s

Page 111: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 2.5 5 7.5 10 12.5 150

0.25

0.5

0.75

1

1.25

z*

ρ*

T = 87 K lw

= 15 σff

ρ*av

= 0.3865

r ♥s ♦ s♦r♦ ♥ ♥ó♥ st♥ ♥ s ♣rs ♥ r♥r ♦♥♦r♠ ♣♦r ♣rsé♥ts 2 ③②s③ ② rtr ❬❪ s r♥ts st♦♥s s♦♥ s ♠♥♦♥s ♥ t①t♦ r ♣♥t♦s ② r②s ♦rrs♣♦♥ ♥ ♣r s♠étr♦ ♦♥ s♥ ♠♦♦ ♥ ♠s ♣rs s♦ r r②s s ♥ ♣♦s s♦ó♥ s♠étr ② ♥t ♥ ♠♦♦ ♣r s♦ r só s ♥♠♥t♥ s♦ó♥ s♠étr q ♣r♦ ♥ ♠♦♦ t♦t r♥r s♦ ♦s á♦s s r③r♦♥ ♣r ♥ r♥r 15σff ♥♦ t♠♣rtr ♥ ② ♥s ♠ ♥ ρ∗av =

♣♦r♥ts s q s r♥s s♦♥ ♣qñs

♥ s ♠str ♦ó♥ ♦s ♣rs ♥s ♦t♥♦s ♥r♠♥t♥♦ ♥ú♠r♦ ♣rtís q

s ♣♦st ♥tr♦ r♥r 15σff ♥♦ ♦♦s ♦s ♣rs s♦ sñ♦ ♦♥ ♥ú♠r♦ ♦rrs♣♦♥♥

s♦♦♥s s♠étrs r sñ ♦♥ ♦rrs♣♦♥ ♥ ♥s ♠ ρ∗av = ② r

♥ ♦♥ ♣♦s ♥ ♥s ♠ q ρ∗av = ♥tr sts ♦s rs ♣r ♥ sr rs

s♦s ♥ss ♥tr♠s ♣ ♦srr q t♦s sts rs ♣rs♥t♥ ♦s♦♥s ♠② rts

r ♥ s ♣rs r♥r ② q sts ♦s♦♥s ♥r♠♥t♥ ♦r ss ♠á①♠♦s ♠ q

♠♥t ♥s ♠

♥ ♣r ♠r♦ ♦♥ ♦rrs♣♦♥♥t s♦ó♥ s♠étr ♠②♦r ♥s ρ∗av = ♦s ♣♦s

r♦ ❱♦rs ♥rí r ♠♦t③ ♣r ♥s ♥ss ♠s ③②s③ ② rtr ❬❪ ♦♠♣r♥ ♦s♦rs ♥rí r t♥t♦ ♣r s s♦♦♥s s♠étrs ♦♠♦ ♣r s s♠étrs sí ♦♠♦ s s♦♥s♣♦r♥ts ♥tr ♦s rst♦s ② ♥str♦s rst♦s P❲ ♥ út♠ ♦♠♥ Fcap ♦rrs♣♦♥ ♥rí r ♥ s♦ ♦♥♥só♥ ♣r ♥ t♦♦s ♦s s♦s s t③ó ♥ r♥r 15σff ♥♦ t♠♣rtr s ó ♥ ② ν = 1 s ♥ss ♣r♦♠♦ ♥ ♥s kBT/σ

2ff ♣rt♥♥ ♥tr♦

♥ ♦♥ ①st♥ s♦♦♥s s♠étrs

♦♦♥s s♠étrs ♦♦♥s s♠étrsρ∗av P❲ r♥ P❲ r♥ Fcap

Page 112: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 2.5 5 7.5 10 12.5 150

0.25

0.5

0.75

1

1.25

z*

ρ*

T = 87 K lw

= 15 σff

1 2 3

4

Ar/CO2

r ♥s ♥ ♥ó♥ st♥ ♥ s ♣rs ♣r r s♦r♦ ♥ ♥ r♥r ♣♥ ♥♦st 15σff ♦♥♦r♠ ♣♦r ♦s ♣rs é♥ts 2 ③②s③ ② rtr ❬❪ ♥ rá♦ s ♠str♥ ♣rs s♠étr♦s ♦rrs♣♦♥♥ts st♦s ♥♠♥ts q s ♦t♥♥ rs♦♥♦ s ♦♥s ♣r r♥ts♥ss ♠s s r sñ ♦♥ st sñ ♦♥ ♦s ♦rs ♥s s♦♥ ② ♣r ♠r♦ ♦♥ ♦rrs♣♦♥ ♥♣r ♦♥ ♥♠♥t s rst♦ s♠trí

sts ♦s♦♥s ♦♠♥③♥ rr s r s♦♥ ♥r♦rs ♣♦r ♠♣♦ ♦s ♦rrs♣♦♥♥ts ♣r

♣rtr qí s s ♥r♠♥t ♥s s rr ♥ s♦ó♥ s♠trí ♣♦t♥ ①tr♥♦

♣r ♦rrs♣♦♥ ♥ ♣r s♠étr♦ s♦♦ ♥ ♥s ♠ ρ∗av = óts ♥ st s♦

q ♥ ♥r♠♥t♦ ♣♥s ♥ ♦r ♥s ♠ ♥r ♥ ♠♦ r♣t♦ ♥ s♠trí

s♦ó♥ s ♣s ♥ s♦ó♥ s♠étr ♥ s♠étr

♣s ♥ ♣r ♦♠♦ ♦tr♦ ♦♠♦ ♥♦ ♦♥ ♦rrs♣♦♥ ♥ r♥r q s ♥♦

íq♦ st tr♥só♥ s ♦♥♦ ♦♥ ♥♦♠r tr♥só♥ s ♣r ♦rrs♣♦♥♥t st♦

♥ ♣♦t♥ qí♠♦ q s ♣r♦ ♥ st stó♥ s ♣rs♠♥t ♥ ♠♥stó♥ ♠ás st t♣♦

tr♥s♦♥s

r♦ s♠trí s ♥t ♠♥t ♦♥t s♠trí ∆N q s ♥ ♦♠♦

∆N =1

2Ns

ˆ lw

0

|ρ(z)− ρ(lw − z)| dz

stó ♦♠♦ s ♠♦ s♠trí ♥ ♥ó♥ L r♥r ♣r T = 87 ♥ rá♦ ③qr

s ♠str♥ ♦s ♦rs ♦♥t s♠trí ♣r r♥rs r♥ts ♥♦s ♥ ♥ó♥

♥s ♠ ρ∗av ♣ ♦srr q s rs s♠trí ♦rrs♣♦♥♥ts s r♥rs ② σff ♥♦ ♥♦ r♥ sst♥♠♥t ♥ ♥t♦ s ♣r♥ r♥♦ ρ∗av ♦♥ ② s♦♦♥s s♠étrs

s♠♥② s♠♥r ♥♦ L∗ st t♥♥ q ♣r r♥rs σff ♥♦ s ♥♥tr♥ s♦♦♥s

s♠étrs ♣r t♠♣rtrs ♥tr tr♣ ② rít ♥ r r s ♠str ♦♠♦ s ♠♦

t♦r s♠trí ♣r r♥r σff ♦♥ t♠♣rtr ♦s rst♦s s♦♥ ♦♠♣ts ♦♥ ♦s q

♦tr♦♥ r♠ ② ♥st♥ ❬❪

Page 113: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

0.2

0.4

0.6

0.8

1

ρ*av

∆N

30

15

12

7.5

6

T = 87 K

Ar/CO2

0 0.1 0.2 0.3 0.4 0.5 0.60

0.2

0.4

0.6

0.8

1

ρav

*

∆N

Ar/CO2

Iw

=15σff

T=104 K

T=96 K

T=87 K

r s rs ♦rrs♣♦♥♥ ♣rá♠tr♦ s♠trí ♥ ♥ó♥ ♥s ♠ ♣r r s♦r♦ ♥ ♥r♥r q st ♦♥stt ♣♦r ♦s ♣rs é♥ts 2 ③②s③ ② rtr ❬❪ r ③qr♦rrs♣♦♥ ♥str♦s á♦s ② ♠str ♦♠♦ ♠ st ♣rá♠tr♦ t♥t♦ ♠♦r ♥♦ r♥r♦♠♦ ♠r ♦r ♥s ♠ ♥ st s♦ ♠♦s ♦ ró♥ t♦r s♠trí ♣rr♥rs ♦♥ ♥♦s ② σff ♣r ♥ t♠♣rtr ♠é♥ s r♦♥ á♦s♣r ♥ r♥r σff ② í ♥♦ s ♥♦♥trr♦♥ s♦♦♥s s♠étrs ♣r ♥♥ú♥ r♥♦ ♥ss ♥ t♠♣rtrs ♥ r r s ♠str♥ ♦s rst♦s ♣r t♦r s♠trí ♦ ♣r r♥r σff r♥♦ t♠♣rtr t♥♥ s s♠r ♦t♥ s♠♥r ♥♦

P♦str♦r♠♥t s ♥③ó s♠trí ♥ ♥ó♥ ♣rá♠tr♦ ν q ♠♦ ♣r♥♣♠♥t ♣r♦♥

♣♦t♥ ♥tró♥ ♠♥♦ ♣♦só♥ ♥ ♣r t ♥ st♥ ♥tr σsf/2 ② σsf♦♠♦ s ♣ ♦srr ♥

Pr ♥ r♥r 15σff ♥♦ ♥♦♥tr♠♦s q ♥r♠♥t♦ ♥ ♦r ν ♣r♦ ♥ ró♥ ♥

♥tr♦ [ρ∗sb1, ρ∗

sb2] ♥ s ♠♥st r♣tr s♠trí s♣t♦ st út♠♦ t♦ s ♣

♦srr ♥ ♦♠♦ ♠ s♠trí ♥ ♥ó♥ ♥s ♠ ♣r ♥♦s ♦rs ν

♥ st♠♦s ♦ó♥ s♠trí ♥ ♥ó♥ ν ♣r ♥ ♥s ♠ ρ∗av =

str♦s á♦s rr♦♥ q s s♦♦♥s s♠étrs s♣r♥ ♥♦ ν >

P♦r út♠♦ ♥ s ♠str♥ ♦♠♦ ♦♦♥♥ ♦s ♣rs ♥s ♣r ♥♦s ♦rs ν ♥

rá s ♣ ♦srr ♦♠♦ s ♥♥♦ r ♦♥♥tr♦ ♥ ♣r ③qr ♥ r♥r 2

♦rrs♣♦♥♥t s♦ó♥ ♠②♦r s♠trí ♣r r ♠ q r ♦r t♦r ν

♣♦r ♥ ♠ q s♠♥② s♠trí ♥ s♦ ♥ q ♣rá♠tr♦ ♥③ ♦r ν = s♦ó♥

♣s sr ♦♠♣t♠♥t s♠étr ② ♦ ♠♦ ♠s ♣rs r♥r

♥♠♦s ♦r ♦ q ♦rr ♥ t♦r♥♦ ♦r ♣rá♠tr♦ ν q ♣♦rí♠♦s ♥♦♠♥r ♦♠♦ rt♦ ♣♦r

♥♠ ♥♦ ①st♥ s♦♦♥s s♠étrs ♣♦só♥ ♣r rí q s♠ ♣♦t♥ ♥♥t♦ q

♥tr♦♥ ♥ s tr♦ r♠ ② ♥st♥ st ♦③ ♥ ν = 1

♦♠♦ s ♠str ♥ ♣♦só♥ ♣r ③qr ♣r ♥tr♦r ♥ st r rs♣t♦

♣r r s

ξHW =σsfν

Pr ♥ r♥r ♦♥ ♥ ♥♦ t♦ 15σff ♦r ♠í♥♠♦ ♣♦t♥ ♥tró♥ sstrt♦♦ ♦

Page 114: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

0.2

0.4

0.6

0.8

1

ρ*av

∆ N

T = 87 K

lw

= 15 σff

Ar/CO2

r t♦r s♠trí ♥ ♥ó♥ ♥s ♠ ♣r r♥ts ♦rs ♣rá♠tr♦ ν ♣r r s♦r♦♥ ♥ r♥r ♣rs é♥ts 2 ③②s③ ② rtr ❬❪ ♥ st r ♣ ♦srrs r♥♦ ♥ss ♣r ♦s s s♦ó♥ s s♠étr s r ♠ás ①tr♥ ♠ás ♥tr♥ ν t♦♠ ♦ss♥ts ♦rs ② r♥r ♣♦s ♥ ♥♦ σff ② t♠♣rtr st ♥

1 1.04 1.08 1.12 1.16 1.20

0.2

0.4

0.6

0.8

0

1

ν

∆ N

T = 87 K

lw

= 15 σff

ρ*av

= 0.1932

Ar/CO2

r t♦r s♠trí ♥ ♥ó♥ ♣rá♠tr♦ ν ♣r ♥ sst♠ ♦♥ ♥s ♠ ♦♥st♥t ③②s③ ② rtr❬❪ ♥ st s♦ ♥s ♠ t♦♠ ♦r ρ∗av = ♠♦s ♥♦♥tr♦ s♦♦♥s s♠étrs s♦♦ ♣r♦rs ν st r♥r ♣♦s ♥ ♥♦ σff ② st ♦♥stt ♣♦r ♦s ♣rs é♥ts 2 ♦ s r ♥ t♠♣rtr

Page 115: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 2.5 5 7.5 10 12.5 150

0.2

0.4

0.6

0.8

1

1.2

z*

ρ* av

T = 87 K

lw

= 15 σff

ρ*av

= 0.1932

Ar/CO2

r Prs ♥s ♥ ♥ó♥ st♥ ♥ s ♣rs ♥ r♥r ♣rs é♥ts 2 σff ♥♦ ③②s③ ② rtr ❬❪ rá♦ ♠str ♦ó♥ ♦s ♣rs ♥s ♣r ♥♦s♦rs ♣rá♠tr♦ ν r só q ♦rrs♣♦♥ s♦ó♥ ♠②♦r s♠trí s s♦ ♦♥ ♦rν = ♥ r r② ν = Pr r ♣♥t♦s ② r②s ν = ② ♣r ♣♥t♦s ν = ♦r ♣r ♣r s ♦♠♣t♠♥t s♠étr♦ ♥ st út♠♦ s♦ ♦ s ♥♥tr ♥ s s íq♠♦♥♦ ♠s ♣rs

♣♦r s t♠é♥ ♥ ♠② ♥ ♣r♦①♠ó♥ ♠í♥♠♦ q ♥ ♣♦t♥ ♦rrs♣♦♥♥t

♥tró♥ ♦♥ ♣r ③qr r♥r st ♠í♥♠♦ st ♦③♦ ♥

ξmin =

(

2

5

)1/6

σsf

♦♥t sts st♥s ξmin

ξHW=

(

2

5

)1/6

νc ≃ 1,013

♦♠♦ ♦r st ♦♥t s♣r ♥ ♠í♥♠♦ ♣♦t♥ ♣r st νc s ♥③ ♥tr♦

r♥r Pr t♠♣rtrs ♠②♦rs ♦s ② ♦rs ν ♥tr ② ♥♦♥tr♠♦s q s s♦♦♥s s♠étrs

s♣r♥ ♣r ♦tr♦ ♦r νc q ♥♦♠♥♠♦s rít♦

♠é♥ s ♥ ♦ á♦s ♥ r♥rs ♠② ♥s ② st 120σff ♥♦ ♥ s s ♣s

♥ stó♥ s♠trí ♥ s♠trí s ♣♦í ♣r♦r ♥ ♠♥r ♠② rs ♥♦ s r③

♥ ♠♦ ♠② ♣qñ♦ ♥ ♥ú♠r♦ ♣rtís

Pr ♥③r ♥áss sst♠ r2 ♣♠♦s t♦rí ♦♥ ♣♦t♥ Usf (z) rst ♦♥tr♦

♣♦r str t ❬❪ q ② ♥tr♦♠♦s ♥ ♣ít♦ ♥ s ♠str q st ♣♦t♥ rst

s ♠ás ♥t♥s♦ q st rtríst ♥♦ ♦r ♣ró♥ ♣rs s♠étr♦s ♥ ♥ r♥r ♦r♠

♣♦r ♦s ♣rs é♥ts 2

♥ s ♣ ♦srr ♥ sr ♣rs s♠étr♦s q ♣r♥ ♥ ♥ r♥r 60σff ♥♦ s

♥♥♦ ♦♥ r t♠♣rtr s ♣♥t♦ tr♣ Pr t♦♦s ♦s ♣rs ♥s ♠

íq♦ ♦♠♦ ② ♦ ♠♦s ♦ ♥ ♣ít♦ ♣r st sst♠ ♦♥ 2 ♦♥stt② ♥ sstrt♦

rt♠♥t trt♦ ♠♦s ♥♦♥tr♦ tr♥só♥ ♠♦♦ s t♠♣rtr ② ♣♦r ♦ t♥t♦ ♥♦ ② í♥s

Page 116: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.2 0.4 0.6 0.8 1 1.2−600

−400

−200

0

200

z [nm]

V[K

] Ar/CO2

r P♦t♥s ♥tró♥ r ♦♥ 2 ♥ ♥ó♥ st♥ ♦rrs♣♦♥ ❬❪ r ♥ í♥ r② ♦rrs♣♦♥ ♣♦t♥ ♠♥trs q r só s ♣♦t♥ t③♦ ♣♦r ♦st♦rs t rr♥ ♦♠♦ ♣ ♦srrs st ♣♦t♥ s ♠ás ♥t♥s♦ q ♦ ♥♦♦r ♣ró♥ s♦♦♥s s♠étrs

♣r♠♦♦ ❬❪ ♦♥s♥t♠♥t s r③♦♥ q ♥♦ s ♦t♥♥ ♣rs s♠étr♦s r ♣r ♥♥♥

t♠♣rtr

r ♥ r♥rs ts ♥♦s

♥ st ó♥ ♥st♠♦s ♥♦ r♥rs ② ♦♥ r ♦s á♦s s r③r♦♥ s♥♦

② ♣♦t♥s rsts ❩ ♠♦s ♥♦♥tr♦ ♥ ♦♥①ó♥ ♥tr ♣r♦♣s s♠trí ② ♠♦♦

ú♥ ♣♦r ♥♠ t♠♣rtr ♠♦♦ Tw ♦t♠♦s s♦♦♥s s ♦♥s ♦rrs♣♦♥♥ts

st♦ ♥♠♥t q r♦♠♣♥ ♦♥ s♠trí ♣♦t♥ sstrt♦♦ sts s♦♦♥s ♣rsst♥ ♣r

t♠♣rtrs T > Tw st q s ♥③ t♠♣rtr rít ♣r♠♦♦ Tcpw ♣rtr í ♥♦ s

♥♦♥trr♦♥ ♥tr♦s ♥s ♥ ♦♥ s s♦♦♥s ♥♠♥ts s♥ s♠étrs r♠♦s ♥t♦♥s q

t♠♣rtr s rst s♠trí st♦ ♥♠♥t s Tcpw

ú♥ ♥str♦ sr ② ♥t♥r ♥♦ ② ♥ trtr ♦tr♦s tr♦s ♦♥ s r♣♦rt st ♦ ♥ sst♠s

ís♦s ♦♥ ♣♦t♥s rsts

♥ ♥str♦ st♦ s♦ró♥ s♦r ①♣♦r♠♦s ró♥ ♥tr s♠trí ♦s ♣rs ② ♥♦ s

r♥rs Pr st ♣r♦♣óst♦ tr♠♦s ♦♥ r♥rs ② 60σff ♥♦ ♦♠♦ ♠♣♦ ♣♦♠♦s tr

q ♦ ♥s ② ❲♥ ❬❪ ♥ tr♦ ♦♥ r♥rs ② 40σff ♣r r ♥t ss st♦s

s♦r ♦♥♥só♥ ♣r íq♦s ♥tr♦ ♦r♠s♠♦

s r♥rs ♥s r♥t③♥ q ♥tró♥ ♥tr s ♠♦és s s♦rs ♥ s ♣rs ♦♣sts s

♣rát♠♥t s♣r ❯♥ ♥♦ 40σff ♣r st ♦ s♦r♦ ♥ ♦s sstrt♦s st♦s s ♠ás q

Page 117: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 40 50 600

1

2

3

4

z*

ρ*ρ*

l

Ar/CO2 T=83.78 K

r ♥s ♥ ♥ó♥ st♥ ♥ s ♣rs ♣r r s♦r♦ ♥ ♥ r♥r ♣♥ ♥ 60σff ♦♥♦r♠ ♣♦r ♦s ♣rs é♥ts 2 rtr ② ③②s③ ❬❪ t♠♣rtr s ♣♥t♦ tr♣ ♥ r s ♠str♥ r♦s ♣rs ♦rrs♣♦♥♥ts ♥ r♥♦ ♥ss q ♥ s st ♦♥ ♥ ♣s♦ ♦♥st♥t í♥ ♦r③♦♥t ♥ ♦♥ ρ∗l ♦rrs♣♦♥ ♥s ♠ s q ② Pr st sst♠ ♦♥ s ♣rs 2 ♦♥stt②♥ ♥ sstrt♦ rt♠♥t trt♦ ♥♦ ♠♦s♥♦♥tr♦ s♦♦♥s s♠étrs

s♥t ♣r r♥t③r st♦

s ♦♥♥♥t str q ♦s á♦s r③♦s ♠♥t s♠♦♥s q ♠♣♥ ♥á♠ ♦r ♦rt♥

♣♦t♥ ♥tró♥ ♣rs ♦ ♥ ú♥ ♦r tr♠♥♦ r♦s tó♠♦s ♠ás ♥r♠♥t

♥ sts s♠♦♥s s tr ♦♥ r♥rs ♥♦ ♠s♦ ♥s ② ú♥ ♣r r♥rs ♥♦sts 10σff ♥♦

♥ ♥♦s s♦s s ♦♥sr♦ q ♥tró♥ ♥tr s ♣♦r♦♥s s ♦ss s ♣rs ♦♣sts

r♥r s s♣r

♦s á♦s ♥str♦s r③♦s ♥ ♦♥t①t♦ ♥♦ t♥♥ ♦rts ♥ ♣♦t♥ ② ♦st♦ ♦♠♣t♦♥

s r③♦♥ ú♥ tr♥♦ ♦♥ r♥rs ①tr♠♠♥t ♥s st 120σff ♥♦

r♦ ♦ sñ♦ ♣r♠♥t ♦t♠♦s s♦♦♥s s♠étrs ♦rrs♣♦♥♥ts st♦ ♥♠♥t

t♠♣rtrs ♠ás r♥s q Tw q ♥ s♦ r s♦r♦ ♥ sú♥ ♥str♦s á♦s s Pr

st sst♠ í♥ ♣r♠♦♦ t♥ ♥ ♦♥t ♠♣♦rt♥t ①t♥é♥♦s st s r♦s ♣♦r ♥♠

t♠♣rtr ♠♦♦ t ♣ ♦srrs ♥ rá♦ r ♣ít♦

♥ s ♠str♥ ♥♦s ♦s ♣rs ♦t♥♦s ♥♦ r s s♦r ♥ ♥ r♥r ♥ 40σff

♦♥♦r♠ ♣♦r ♣rs é♥ts T = 115 Tw í ♣♥ ♦srrs ♣rs s♠étr♦s q

♦rrs♣♦♥♥ st♦s ♥♠♥ts sñ♦s ♣♦r ② ♥t♦ ♥ ♣r s♠étr♦ ♠②♦r ♥s ♠

♦♠♦

s ♠♣♦rt♥t str q ①st♥ ♦s s♦♦♥s s♠étrs ♥rs ♥ r s rs ② ♦rrs

♣♦♥♥ ♣rs s♠étr♦s ♦♥ r st s♦r♦ ♠②♦r♠♥t ♥ ♣r ③qr r♥r s♦ó♥

q ♥♦♠♥r♠♦s ♣é♥♦s ♦t♥r ♥ ♣r t♦t♠♥t q♥t s♣r st ♦♥ r

st s♦r♦ ♠②♦r♠♥t ♥ ♣r r s♦ó♥ ♥♦♠♥ ♦♠♦ ♠♥♦♥♠♦s ♦s ♣rs

② s♦♥ ♥r♦s

♥ s ♠str ♥í r s♦ s s♦♦♥s t♥t♦ s♠étrs ♦♠♦ s♠étrs ♣r T = 115

♥ st r ♣♦♠♦s ♦srr ♥ r♥♦ st♥t ♠♣♦ ♥ss ♠s ♥ ♦♥ s s♦♦♥s q r♦♠♣♥

s♠trí ♣♦t♥ ①tr♥♦ ♣♦s♥ ♠♥♦r ♥rí q s s♦♦♥s q ♠♥t♥♥ s s♠trí ♦s♦tr♦s ♠♦s

Page 118: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 5 10 15 20 25 30 35 400

0.2

0.4

0.6

0.8

1

1.2

1.4

z*

ρ*

Ar/Li T=115 K

1

2 3

r ♥s r s♦r♦ ♥ ♥ r♥r ♥ ♥ó♥ st♥ ♥ s ♣rs r♥rrtr ② ③②s③ ❬❪ r♥r ♣♦s ♥ ♥♦ 40σff ② s ♦♥s s rs♦r♦♥ ♣r ♥t♠♣rtr s rs ♦rrs♣♦♥♥ r♥ts ♦rs ♥s ♠ r sñ ♦♥ ♦♥stt② ♥ ♣r s♠étr♦ ♥♦st♦ ② ♥s ♠ s ρ∗av = ♣r sñ♦ ♦♥ ♣rρ∗av = s t♠é♥ s♠étr♦ ② s s♠étr♦ ♦♥ ρ∗av =

0 0.05 0.1 0.15 0.2 0.25−11.5

−11.4

−11.3

−11.2

−11.1

−11

ρ*av

f DF/k

BT

Ar/Li T=115 K

r ♥rí r ♣♦r ♣rtí ♥ ♥ó♥ ♥s ♠ ♣r r s♦r♦ ♥ ♥ r♥r ♣rs é♥ts ♥ t♠♣rtr rtr ② ③②s③ ❬❪ ♥ st s♦ r♥r ♣♦s ♥ ♥♦ 40σff r ♥ ♦♥ ír♦s ♦rrs♣♦♥ s♦♦♥s s♠étrs ♠♥trs q trá♥♦s s s♦ s s♦♦♥s s♠étrs ♦♠♦ ♠str rá♦ ①st ♥ r♥♦ st♥t ♠♣♦ ♦♥ st♦ ♥♠♥tr♦♠♣ ♦♥ s♠trí ♣♦t♥ ①tr♥♦ st r♥♦ s ①t♥ st ♥ ♦r ρ∗av =

Page 119: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

Ar/Li

L*=10

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

Ar/Li

L*=20

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

Ar/Li

L*=40

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

L*=60

Ar/Li

r ♦♥t s♠trí ♥ ♥ó♥ ♥s ♠ ♣r r s♦r♦ ♥ r♥rs ♣rs é♥ts ♦ r♥ts t♠♣rtrs rtr ② ③②s③ ❬❪ ♠str♥ rst♦s ♣r L∗ = 10, 20, 40 ② 60σff s s rs ♠ás ①tr♥s s ♠ás ♥tr♥s s t♠♣rtrs ♥ ②

♦t♥♦ q st r♥♦ s ①t♥ s ρ∗av = st ρ∗av = ♣r r s♦r♦ s♦r ♥♦

t♠♣rtr s Pr t♠♣rtrs ♠ás ts r♥♦ s♠♥② ② ♣♦r ♥♠ ♦s ♥♦ s

♥♦♥trr♦♥ s♦♦♥s s♠étrs

♥ ♠♦str♠♦s rst♦s ♣r t♦r s♠trí ∆N ♥ ♥ó♥ ♥s ♠ ♣r r♥rs

r♥ts ♥♦s Prs♥t♠♦s rá♦s ♣r ♥ r♥r ♥♦st 10σff ♥ ♦♥ ♥♦ s ♣♥ s♣r

r ♦♠♣t♠♥t ♦s t♦s s ♥tr♦♥s ♥tr ♠♦és s s♦rs ♥ s ♣rs ♦♣sts q

♦♥stt②♥ r♥r ② ♠ás ♥s ② 60σff

♥ rá♦ ② rs s ♣r r♥ts t♠♣rtrs ♦♠♦ ♣ ♦srrs ♥ t♦♦s ♦s rá♦s

♣r ♥ r♥♦ ♥ss ♠s ♥ st♦ ♥♠♥t r♦♠♣ s♠trí ♣♦t♥ ①tr♥♦ ②

s r♥♦ s r ♠ q t♠♣rtr ♠♥t P♦r ♥♠ í♠t s♣r♦r Tcpw s s♦♦♥s

s♠étrs s♣r♥

♠é♥ s ♦sr q r♥♦ s♠trí ♥ t♠♣rtr s ♠ás str♦ ② s ♥tr ♥ ♦rs ♠s

♣qñ♦s ρ∗av ♠ q s ♥r♠♥t ♥♦ r♥r

st ♦♠♣♦rt♠♥t♦ ①♣♦r♦ t♠é♥ ♥ s♦ró♥ s♦r sstrt♦s ♠ás és ② ♥ í♥s

♥rs s ♥♦♥tr♦ ♣r ♦s rtrísts t♦t♠♥t s♠rs ♠♦♦ ♠♣♦s s♦ró♥ r

♥ r♥rs ♦♥♦r♠s ♣♦r sstrt♦s ② 60σff ♥♦ s ♠str ♥ s s ②

Pr s♦ s st♦ ♦♠♣♦rt♠♥t♦ ♣r ♦rs t♠♣rtr tr♣ t♠♣rtr

q st ♣♥s ♣♦r ♦ t♠♣rtr ♠♦♦ Tw = ② ♥♦ ♦rs ♠ás ♣♦r ♥♠

t♠♣rtr ♠♦♦ s♠trí s♣r ♥♦ s s♣r ♥ t♠♣rtr q st ♣♦r ♥♠

Page 120: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

Ar/Na

L*=60

r ♦♥t s♠trí ♥ ♥ó♥ ♥s ♠ ♦rrs♣♦♥♥t r s♦r♦ ♥ rtr ② ③②s③❬❪ ♥ st s♦ s r♥rs s♦♥ s♥t♠♥t ♥s 60σff ♣é♥♦s s♣rr ♦♠♣t♠♥t ♦s t♦s s ♥tr♦♥s ♥tr ♠♦és s s♦rs ♥ s ♣rs ♦♣sts s s rs ♠ás ①tr♥s s♠ás ♥tr♥s s t♠♣rtrs t♦♠♥ ♦s s♥ts ♦rs ②

Tw

♥ s♦ s ♥③ó s♠trí ♣r t♠♣rtr tr♣ ♥ t♠♣rtr q st ♣♥s ♣♦r ♦

♠♦♦ Tw = ② trs ♦rs q stá♥ ♣♦r ♥♠ st t♠♣rtr ♥ st s♦ ♠♦s

♥♦♥tr♦ ♥ í♠t s♣r♦r ♣r Tcpw

Pr s♦ ♠♦s ♥♦♥tr♦ rtrísts ♠♦♦ t♦t♠♥t ♥á♦s

♠♣rtr í♠t r♣tr s♠trí

tr♠♥♠♦s ♦r ♠♥r sst♠át ♣r s♦ s♦ró♥ ♥ r♥rs t♠♣rtr ♠á①♠

♣♦r ♥♠ s♣r♥ s s♦♦♥s s♠étrs ♦♠♦ s♦♦♥s ♠ás ♥rí st ♥áss

♦ ♠♦s t③♥♦ ♦s ♦rs ♦s q r♦♥ ♦♦s ♥ ♦s rá♦s

Pr t♦♦s ♦s t♠ñ♦s r♥r t③♦s s s♦♦♥s s♠étrs s♣r♥ t♠♣rtrs ♠②♦rs ♦s

tr♠♥ ♥t♦♥s ♦r ♥s rt ♠ ρ∗av(crit) q s ♦rrs♣♦♥ ♦♥ ♠á①♠♦ ∆N

♣r L∗ st ♦r ♣ sr ①♣rs♦ ♦♠♦

ρ∗av(crit) =A

Bσ2ff

♦♥ σff ①♣rsrs ♥ ♥♥ó♠tr♦s Pr L∗ = 60 ♦t♥♠♦s A/B = 9/16 ② ♣r L∗ = 40 ♦t♥♠♦s

A/B = 17/24 Pr r♥rs 20σff st ♦♥t 55/48 ② ♣r r♥rs t♥ ♥♦sts ♦♠♦ 10σff 97/48

♠str ♦s ♦rs q t♦♠ ♦♥t s♠trí ♦rrs♣♦♥♥ts ρ∗av(crit) ♦s t♥t♦

♣r s♦♦♥s t♣♦ ♦♠♦ t♠♣rtrs ♠②♦rs s ♠♦♦

Page 121: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ρ*av

∆ N

Ar/Rb

L*=60

r ♦♥t s♠trí ♥ ♥ó♥ ♥s ♠ ♦rrs♣♦♥♥t r s♦r♦ ♥ ♣r r♥rs♠② ♥s rtr ② ③②s③ ❬❪ r♥r ♣♦s 60σff ♥♦ s s rs ♠ás ①tr♥s s ♠ás♥tr♥s s t♠♣rtrs t♦♠♥ ♦s s♥ts ♦rs ②

−0.8 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0.8110

112

114

116

118

120

∆N

T [K

]

Tcpw

Ar/Li

r ♠♣rtr ♥ ♥ó♥ ♣rá♠tr♦ s♠trí ♣r s♦♦♥s ② ♦rrs♣♦♥♥t r s♦r♦ ♥r♥rs rtr ② ③②s③ ❬❪ st♦s á♦s ♥ s♦ r③♦s ♣r r♥rs ♥♦s 10σff trá♥♦s rr 20σff r♦s 40σff trá♥♦s ♦ ② 60σff ír♦s ♥s ♦rrs♣♦♥ ρ∗av = ρ∗av(crit) s rs sós ♦rrs♣♦♥♥ st s♦s t♦s ♠♥t ♣♦♥♦♠♦

Page 122: Adsorción de fluidos sobre sustratos sólidos, estudiada

2 3 4 5 6 7 8−0.85

−0.8

−0.75

−0.7

−0.65

−0.6

−0.55

−0.5

Γl

∆µ/k

B [K

]Xe/Na T=245 K

CS1

SS1

SS2

SA2

CS2

MS1

MA

MS2

SA1

r s♦tr♠s s♦ró♥ ❳ ♥ ♥ r♥r ♣♥ ♣rs é♥ts ③②s③ ② rtr ❬❪ t♠♣rtr T = st á♦ r③♦ t♥t♦ ♣r ♥ r♥r rr ♦♠♦ rt ♦s ♦rs s♦♦s s s♦♦♥s s♠étrs stá♥ ♦♥t♥♦s ♥ r q ♥ ♦s ♣♥t♦s ♠r♦s ♦♥ CS1 SS1 SS2 ② CS2 ss♦♦♥s s♠étrs stá♥ ♦♥t♥s ♥ r q ♥ SS1 SA1 SA2 ② SS2 ♦s tr♠♦s ♥♦s ♦♥ í♥s tr③♦s ♦rrs♣♦♥♥ s♦♦♥s ♦♥ dµ/dn < 0 rt ♦r③♦♥t ♣♥t♦s ② r②s s ♦♥stró♥ ① árs ♦s st♦s MS1 ② MS2 s♦♥ s♠étr♦s ② MA s ♥ st♦ s♠étr♦ st♦s st♦s s♦♥ sts

♦s t♦s r♦♥ st♦s ♦♥ s♥t ♣♦♥♦♠♦

T = Tsb + a2∆2N + a4∆

4N + a6∆

6N

s ♣ ♦srr q t♦s sts rs st s♦♥ ♦♥sst♥ts ♦♥ ♦r t♠♣rtr ♣♦r ♥♠

♥♦ ①st♥ s♦♦♥s s♠étrs Tsb =

♦♥♥♠♥t♦ ❳♥ó♥

♥ s♦ st s ♥♦ ♣rs♥t♠♦s ♣r♠r♦ ♥áss ♥♦ r♥rs rrs ② P♦r

út♠♦ ♦♠♦ ♠♣♦ r♥rs rts sr♠♦s ♦s rst♦s ♣r

❳ ♥ r♥rs rrs ts ♥♦s

♥ s rr♦♥ s♦tr♠s s♦ró♥ ♣r ❳ ♣♦st♦ ♥ ♥ r♥r q stá T = 245

st t♠♣rtr stá st♦ ♦ Tcpw ♦♠♦ ♣ ♦srrs ♥

♥ rá♦ s ♥♥ ♦rs ♣♦t♥ qí♠♦ r♦ ♦rrs♣♦♥♥ts t♥t♦ s♦♦♥s s♠étrs ♦♠♦

s♠étrs s s♠étrs stá♥ ♦♥t♥s ♥ r q ♥ ♦s ♣♥t♦s sñ♦s ♣♦r CS1 SS1 SS2 ② CS2

Page 123: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 4 8 32 36 400

5

10

15

20

25

z*

ρ [n

m−3

]

Xe/Na T=245 K

r Prs ♥s ♦rrs♣♦♥♥ts ❳ s♦r♦ ♥ ♥ r♥r rr ♣rs é♥ts ♥t♠♣rtr ③②s③ ② rtr ❬❪ rá ♠str ♣rs s♠étr♦s ♦rrs♣♦♥♥ts tr♦♦rs t♦r r♠♥t♦ ② r ♥ í♥ rs Γℓ = ♦rrs♣♦♥ st♦♠r♦ ♦♥ MA ♥ ♠♦s ♥♦tr q st♦s ♣rs t♠é♥ s ♦t♥♥ ♣r r♥r rt

4 8 12 160

20

40

60

80

Γl

∆N

(%)

Xe/Na

r t♦r s♠trí ♥ ♥ó♥ t♦r r♠♥t♦ ♣r ❳ s♦r♦ ♥ ♥ r♥r rr ③②s③② rtr ❬❪ s t♠♣rtrs ♥ s r ♠r ♦♥ ♥ trá♥♦ st t♠♣rtr r sñ ♦♥ ♥ ír♦ ♥③♥♦ ♥ r♦ sts t♠♣rtrs stá♥ ♥ ♥tr♦ q s t♠♣rtr ♠♦♦ st t♠♣rtr rít ♣r♠♦♦

Page 124: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 4 5 6 7−6

−5

−4

−3

−2

−1

0

Γl

∆µ/k

B [

K]

Xe/Li

2 3 4 5 60

5

10

15

20

25

Γl

∆ N (

%)

Xe/Li

r s♦tr♠s s♦ró♥ ❳ ② t♦r s♠trí ③②s③ ② rtr ❬❪ r ③qr ♦rrs♣♦♥ s s♦tr♠s s♦ró♥ ❳ ♥ ♥ r♥r ♥ st r ♣♥ ♦srrs s sss ♦♥str♦♥s ① ♣r ♥ s s♦tr♠s s t♠♣rtrs s♥♥ ♥ ♣s♦s ♥ r♦ s trá♥♦ ír♦ ♥ r r s ♠str t♦r s♠trí ♥ ♥ó♥ t♦r r♠♥t♦ ♦♠♦ s ♣ ♦srr ♣r ♠ás ♥ r♥♦ ♥ss ♣r ♦s s s s♦♦♥s r♦♠♣♥♦♥ s♠trí ♣♦t♥ ①tr♥♦ ♥ ♦s trs r♥♦s s t♠♣rtrs ♥ s trá♥♦s st ír♦s

♠♥trs q s s♠étrs stá♥ ♥s ♦ r♦ r q ♥ SS1 SA1 SA2 ② SS2 ♦s tr♠♦s

♥♦s ♦♥ í♥s ♦♥t♥s ♦rrs♣♦♥♥ st♦s sts ② ♠tsts ♦♥ dµ/dn > 0 ♥ ♠♦ s í♥s

tr③♦s ♦rrs♣♦♥♥ s♦♦♥s ♦♥ dµ/dn < 0 ♥ s ♠str♥ ♣rs s♠étr♦s ♣r r♦s

♦rs r♠♥t♦

♦♥t s♠trí ♣r st sst♠ rr♦ ♦ ♣r rs t♠♣rtrs stá ♦ ♥

í s ♣ ♦srr ♥ ♦♥t♥♦ s♦♦♥s s♠étrs

♥ ♠♦str♠♦s strtr s s♦tr♠s s♦ró♥ ❳ ♥ ♥ r♥r 40σff

♥♦ st r ♦♥ ♦♥ ♠♦str ♥tr♦r♠♥t ♣r ❳ s♦r♦ s♦r ♥ ♣r Pr

♥ sts s♦tr♠s s ♥ ♦ s ♦rrs♣♦♥♥ts ♦♥str♦♥s ① árs s

♣♦str ❳ ♥ r♥rs r♥ s♦ ♥♦ r♥rs ♠♦s ♥♦♥tr♦ q ♥

t♠♣rtr ♣♥ ①str ♠ás ♥ ♥tr♦ ♥ss ♣r ♦s s s ♣rs♥t♥ r♣trs ♥

s♠trí s s♦♦♥s

♠str ♦♥t s♠trí í s ♦sr♥ trs ♥tr♦s ♥s ♥ r♥♦s ♣r

♦s s s s♦♦♥s ♦t♥s ♣rs♥t♥ s♠trí ♥ st s♦ r♥ ♦s st♦s ♥tr♦r♠♥t

s♦r ♠s ♣rs ♦ s s♦r ♥ s íq s ♠♣♦rt♥t rstr t♠é♥ q q ♥ ♦s s♦s

①♣st♦s ♥tr♦r♠♥t ♣♦r ♥♠ rt ♥s s♦ó♥ r♣r s♠trí ♣♦t♥ ①tr♥♦

♥ ♦s rá♦s ② s ♠str♥ ♣rs ♥ss q ♦rrs♣♦♥♥ ♥♦

♦s ♥tr♦s ♥s ♠♦str♦s ♥ í s ♦♠♣r♥ ♥ ♣r s♠étr♦ ♦♥ s♠étr♦ st

♠♥♦r r♠♥t♦ óts q ♥ t♦♦s ♦s s♦s s♠trí ♦s ♣rs s♠♥② ♥♦ ♠♦s ♣s♥♦

♣r♠r ♥tr♦ út♠♦

♥ s ♣ ♦srr t s♦tr♠ ♦♥str t♥t♦ ♦♥ s♦♦♥s s♠étrs r

tr③♦ ♦♥t♥♦ ♦♠♦ s♠étrs tr③♦ s♦♥t♥♦ s♦ ♦s ♣rs q s ♠str♥ ♥ s

Page 125: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 3 6 34 37 400

10

20

30

40

z*

ρ [n

m−3

] Xe/Li T=205 K

(a) 0 3 6 34 37 400

10

20

30

40

z*

ρ [n

m−3

] Xe/Li T=205 K

(b)

0 3 6 34 37 400

10

20

30

40

z*

ρ [n

m−3

] Xe/Li T=205 K

(c)

r ♥s ♦rrs♣♦♥♥t ❳ s♦r♦ ♥ ♥ r♥r ♣rs é♥ts ③②s③ ② rtr ❬❪ r♥r ♣♦s ♥ ♥♦ 40σff ♦s rá♦s ② stá♥ s♦♦s ♣r♠r s♥♦ ② trr ♥tr♦ ♥s rs♣t♠♥t ♣r ♦s s ①st♥ s♦♦♥s s♠étrs r ♥ t♦♦s ♦s rá♦ss ♦♠♣r ♣r s♠étr♦ ♦♥ s♠étr♦ ♠♥♦r r♠♥t♦ ♥ s♦ rá♦ ♣r s♠étr♦♣♦s ♥ ♦r Γ = ② s♠étr♦ Γ = ♥ rá♦ t♦r r♠♥t♦ t♦♠ ♦s ♦rs ② ♥ rá♦ ♣r s♠étr♦ ♣♦s ♥ ♦r Γ = ② ♣r s♠étr♦ Γ = ótsq st s♦ ♦♥t s♠trí ♥♦ s♣r 5%

5.4 6−1.69

−1.68

−1.67

∆µ/k

B [K]

2 3 4−4

−3

−2

Γl

∆µ/k

B [K]

Xe/Li

T=205 K

r P♦t♥ qí♠♦ r♦ ♥ ♥ó♥ t♦r r♠♥t♦ ♣r ❳ s♦r♦ ♥ ♥ r♥r ♣rsé♥ts ♥ t♠♣rtr ③②s③ ② rtr ❬❪ rá♦ r t♦♦ r♥♦ ♥ss♥ ♦♥ s ♠♥st♥ s s♦♦♥s s♠étrs s rs sós ♦rrs♣♦♥♥ s s♠étrs ② s r②s s s♠étrs ♥ st rá♦ ♥♦ s ♠str♥ s ♦♥str♦♥s ① ♦rrs♣♦♥♥ts sts s♦tr♠s

Page 126: Adsorción de fluidos sobre sustratos sólidos, estudiada

−20 −10 0 10 20−120

−100

−80

−60

−40

−20

0

∆N

(%)

∆ f D

F/kB [

mK

]Xe/Li

1

2

3 4

r ♥rí r ♣♦r ♣rtí ♥ ♥ó♥ t♦r s♠trí ♣r ❳ s♦r♦ ♥ ♥ r♥r ♣rs é♥ts ③②s③ ② rtr ❬❪ ♥ r s ♣♥ ♦srr s rrrs ♥rí ♥tr s s♦♦♥s s♠étrsír♦s ② s s♠étrs trá♥♦s ♣r s t♠♣rtrs ② s q s s♥r♦♥ ♦s♥ú♠r♦s ② rs♣t♠♥t ♦s ♥♦ s ♥♦♥tró ♥♥♥ rrr

s s♦♦♥s s♠étrs ♣r♥ ♥ ♥ ♠á①♠♦ rt♦ ♣♦t♥ qí♠♦ ♦rrs♣♦♥♥t s s♦♦♥s

s♠étrs q ♠r♠♦s µsym ② s♣r♥ ♥ s♥t ♠í♥♠♦ rt♦ st ♠♥r s s♦♦♥s

s♠étrs ♣r♥ s♦♦ ♥ ró♥ ♦♥ ♣♥♥t µsym s ♥t ♦ q ♠♣ ♥st s

s♦♦♥s s♠étrs ♥rs♠♥t ♣♥♥t ♣♦t♥ qí♠♦ s♦ó♥ s♠étr µasym s ♥t

s♦r ♥ r♥ ♣♦ró♥ ró♥ ♥ ♦♥ s sts♥ s ♦♥♦♥s st s s♦♦♥s s♠étrs

P♦r ♦tr♦ ♦ ♣♦♠♦s r ♥ st♠ó♥ rs rrr ♥rét q s♣r ♠s s♣s

s♦♦♥s s♠♥♦ ♥ t♠♣rtr T ② ♥ ♥ú♠r♦ ♦ ♣rtís ♣♦r ♥ ár ①♣rsó♥

ρ(z) = (1− α)ρasym(z) + αρsym(z)

♥♦s ♣r♠t ♣sr s ♦s st♦s s♠étr♦s ♦s s♠étr♦s ♠♦♥♦ ♥tr ② ♦r ♣rá♠tr♦ α

♥t♦ ♥rí r ♣♦r ♣rtí fDF = FDF /N ♦♠♦ ♦♥t s♠trí ∆N s♦♥ ♦s r♥♦

♦r st ♣rá♠tr♦

♥ s ♣ ♦srr ♥ ♦♠♣ró♥ s♦r ♠s♠ s ♥rí ♣r rs t♠♣rtrs

í s ♠str♥ s rrrs ♥réts ♦rrs♣♦♥♥ts s♦♦♥s s♠étrs ② s♠étrs ♦♠♦ ♥ ♥ó♥

t♦r s♠trí ♣r ♥ ♦r ♦ n q ♥ st s♦ s st ♦r ♦rrs♣♦♥ ♣r

♥s ♠á①♠ s♠trí

Pr ♦♦r t♦♦ ♥ ♠s♠ s ♥rí s rst♦ ♥ ♦♥st♥t q ♠♠♦s f0DF st ♠♥r

♥ ♦r♥s s t♥ ♦s ♦rs ∆fDF = fDF − f0DF

str♦s á♦s rr♦♥ q rrr ♥rí s♠♥② ♦♥ ♥r♠♥t♦ t♠♣rtr ② s♣r ♥

t♠♣rtr

❳ ♥ r♥rs rrs ♥s♦

Page 127: Adsorción de fluidos sobre sustratos sólidos, estudiada

2 3 4 5 6 70

3

6

9

12

15

Γl

∆ N (

%)

Xe/Mg

r t♦r s♠trí ♣r sst♠ ❳ ♥ ♥ó♥ t♦r r♠♥t♦ ③②s③ ② rtr ❬❪ ♦♠♦s ♣ ♦srr ♣r ♠ás ♥ r♥♦ ♥ss ♣r ♦s s s s♦♦♥s r♦♠♣♥ ♦♥ s♠trí ♣♦t♥ ①tr♥♦ ♦s trá♥♦s ♦ ♦rrs♣♦♥♥ t♠♣rtr tr♣ ♦s ír♦s Tnb ♦s trá♥♦s rr ② ♦s r♦s

r♥sr♠♦s s♦♦ ♥♦s rst♦s ♥str♦ st♦ s♦ró♥ s♦r ♥ sstrt♦ t♥ rt ♦♠♦

♣s s ♣rs♥t♥ rtrísts s♠rs ❳ ♠♦ ♠♥r ♦♥t♥ ♣rtr

t♠♣rtr ♣♥t♦ tr♣

str♦s á♦s ♥♦s ♣r♠tr♦♥ ♥♦♥trr ♣r rss t♠♣rtrs ② ♣r sstrt♦s rt♠♥t rts

♦♠♦ ② st♦♥s ♥ ♦♥ ♣r ♠ás ♥ ♥tr♦ ♥s ♣r♥ s♦♦♥s s♠étrs

r s♦s ♥tr♦s st♦ ♥♠♥t r s♠trí ♣♦t♥ ①tr♥♦ Pr♥♣♠♥t ♣♦♠♦s

rstr ♥áss st sst♠ q t♠é♥ ♣r♥ ♠út♣s ♥tr♦s ♦♥ ♣♥ ♣rs♥trs st♦s

s♠étr♦s s ♥á♦ ♥ s ♣♥ ♦srr trs ♥tr♦s ♠② str♦s ♦♥

♣♥ ♣rs♥trs st♦s s♠étr♦s ♦♠♦ ♣r ♦s ♠ás sstrt♦s st♦s ♥tr♦s s♦♥ ♠ás ♥♦st♦s ♠

q s t♠♣rtr ♥ ♥á♦ s ♣♥ ♦srr ♦s ♣rs ♥♦ ♦s

♣♥s ♣♦r ♥♠ ♦tr♦ ♦s t♠♣rtr ♣♥t♦ tr♣ s♦♦s r♠♥t♦s q ♥

② ♣r r s♣r♦r

❳ ♥ r♥rs rts ♦♦

♥③♠♦s s♦ró♥ ❳ ② ♥ r♥rs rts ♦♠♣r♥♦ ♥ ♥♦s s♦s ♦♥ ♦s rst♦s ♦t♥♦s

♥ r♥rs rrs ♥ st s♦ r♥r s ♦♦ ♥ ♦♥tt♦ ♦♥ ♥ rsr♦r♦ ♦ ♦♥ ♣

♥tr♠r ♥ ♦ rrstrt♦ ♣rtís ♣r♦ t ♦r♠ q t♦♦ sst♠ q rtr③♦ ♣♦r ♥

♦r ♣r♦ ♣♦t♥ qí♠♦ µ

♦♠♦ ② ♠♦s ♥ ♣ít♦ ♥s♠ ♠ás ♦ ♣r trtr st t♣♦ sst♠s ♦♥ µ T ② V

Page 128: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 1 2 3 37 38 39 400

20

40

60

80

z*

ρ [n

m−3

] Xe/Mg T=Tt

r Prs ♥s s♠étr♦s ❳ s♦r♦ ♥ ♥ r♥r ♣rs é♥ts t♠♣rtr ♣♥t♦ tr♣ ❳ ③②s③ ② rtr ❬❪ ♦s t♦rs r♠♥t♦ ♥ ② r s♣r♦r

♣r♠♥♥ ♦♥st♥ts s r♥ ♥ó♥♦

♦♠♦ sí ♥ s♦ s♦ró♥ s♦r sstrt♦s ♣♥♦s s s♦♦♥s q s ♦t♥♥ ♥ st s♦

♥♦ r♥ sst♥♠♥t s ♦t♥s ♥♦ s tr ♦♥ r♥rs rrs s♦ ♣♦rq s s♦♦♥s

♦t♥s s♦♥ qs ♦♥ dµ/dn > 0 q ♦rrs♣♦♥♥ st♦s sts ♦ ♠tsts

♥ s ♣ ♦srr ♥ s♦tr♠ s♦ró♥ ♣r st t♠♣rtr ♥ rá♦ s ♥♥ ♦rs

♣♦t♥ qí♠♦ r♦ ♦rrs♣♦♥♥t t♥t♦ s♦♦♥s s♠étrs ♦♠♦ s♠étrs ♦t♥s ♣r

r♥r rt sí ♦♠♦ ♣r ♠s♠ r♥r rr ♥ s ♠s♠s ♦♥♦♥s

♦s st♦s ♦t♥♦s ♠♥t ♠♣♦ r♥ ♥ó♥♦ s♦♥ ♠♦str♦s ♥ í♥ só ♥ í♥ r②s s

♠str♥ ♦s rst♦s q s ♦tr♦♥ ♣r ♠s♠ r♥r rr ♦♥ ♥ú♠r♦ ♣rtís s ♦♦

♥ú♠r♦ ♠♦ ♣rtís q rr♦♥ ♦s á♦s ♣r r♥r rt ② ♦♥ ♠ás rs

♦rrs♣♦♥♥t ♦r ♣♦t♥ qí♠♦ ♦♠♦ s ♣ ♦srr ♥ rá ①st♥ ♥tr♦s ♦♥ ♠s

rs s s♣r♣♦♥♥ ♦♠♦ ② s ♦♠♥tó ♥♦ s st♦ s♦ró♥ s♦r ♣rs ♦r♠s♠♦ r♥ ♥ó♥♦

s♦♦ ♣r♠t ♥♦♥trr rst♦s ♦rrs♣♦♥♥ts s♦♦♥s sts ♦ ♠tsts dµ/dn > 0 í♥

r②s ♦r③♦♥t ♥ st r ♦rrs♣♦♥ ♦♥stró♥ ① árs s st í♥ ♥ ♦s st♦s

sts ♠r♦s ♦♥MS1 ②MS2 ♣r♦ t♠é♥ ♣s ①t♠♥t ♣♦rMA q ♦rrs♣♦♥ ♥ st♦ s♠étr♦

st

♥ rá s ♣♦♥ ♥ ♥ q ♥ ♠♦s s♦s r♥rs rts ♦ rrs ①st♥ s♦♦♥s q r♦♠♣♥

s♠trí ♣♦t♥ ①tr♥♦ ♣♦ ♦ ② q ♣r st sst♠ ♥ s ♦♥♦♥s ♣rs t♠♣rtr

② ♣♦t♥ qí♠♦ ♥♦ r♥r s rt ①st♥ trs st♦s ♥ ♦①st♥ ♥♦ ♦s s s s♠étr♦

❱ r ♣r st sst♠ ♥♦ stá rr♦ ♦♠♦ s ♠str ♥ ♣♥ ①str ♥ ♦♥t♥♦

s♦♦♥s s♠étrs ♥♦ r♥r s r s♦♦ ♥ s♦ó♥ s♠étr st q s ♥ ♦♥ MA

♥ t♥ s♦♦ ♠s♠♦ ♣♦t♥ qí♠♦ q s s♠étrs MS1 ② MS2 q ♦①st♥ ♥tr♦

r♥r

♥ s ♣♥ ♦srr ♦♥str♦♥s ① tr♠♥s ♠♥t ♠ét♦♦ s t♥♥ts q

♦♥sr s♦♦♥s sts ② ♠tsts q ♣r♠t♥ ♦t♥r ♦s ♦rs ♦①st♥ ♥♦ s tr

Page 129: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.8 −0.7 −0.6 −0.5

−1.664

−1.662

−1.66

∆µ/kB [K]

ω/k B

K/n

m2 ]

Xe/Na T=245 K

CS1

SS2

SS1

CS2

SA1

SA2

Mcross

r r♥ ♥rí r ♣♦r ♥ ár ♥ ♥ó♥ ♣♦t♥ qí♠♦ r♦ ♦rrs♣♦♥♥t ❳ s♦r♦♥ ♥ r♥r ♣rs é♥ts ③②s③ ② rtr ❬❪ st rá♦ r③♦ t♥♥♦ ♥ ♥tt♥t♦ s s♦♦♥s s♠étrs ♦♠♦ s s♠étrs ♦♥ ♦s ♦rs r♥ ♥rí r ② ♣♦t♥ qí♠♦ s s♦♦♥s s♠étrs s ♦♥♦♥♥ s rs q ♥♥ ♦s ♣♥t♦s CS1 ♦♥ SS1 ② SS2 ♦♥ CS2 ♦♥ ss♦♦♥s s♠étrs s r♠ó r q ♥ SA1 ♦♥ SA2 ♦s sts rs s ♦rt♥ ♥ ♥ s♦♦ ♣♥t♦♠r♦ ♦♥ Mcross st♦ ♠♣rí q ♦ rts ♦♥♦♥s ♣♥ ♦①str trs st♦s ♥ qr♦ ♦s ♦s s♠étr♦s ② ♥♦ s♠étr♦ ♦r ♣♦t♥ qí♠♦ s♦♦ Mcross s ♠s♠♦ q s ♥♦ s ♠♣♠♥t ♦♥stró♥ ① s árs ♣r s s♦♦♥s s♠étrs

♦♥ s s♦♦♥s s ♠♥t r♥ ♥ó♥♦ ♦♥ stá♥ s♥ts ♦s st♦s ♥sts ♦s rs ♥

♣♥t♦Mcross s í♥s ②♦s ①tr♠♦s ♥ s♦ ♠r♦s ♣♦r CS1−SS1 ② SS2−CS2 tr♠♥♥ ♦s ♦rs

♦①st♥ ♦rrs♣♦♥♥ts s s♦♦♥s s♠étrs q ♥ ♥ s♦ sñ♦s ♣♦r MS1 ② MS2 s

♠♣♦rt♥t r♠rr q ♦s t♦s r♦s ♥ st r ♥♥ q ♣r ♦r µ ♦s st♦s s♠étr♦s

♠tsts s♠♣r t♥♥ r♥ ♣♦t♥ ω ♠ás ♦ q ♦s ♠tsts s♠étr♦s s♦ ♥ ♣♥t♦ Mcross

í♥ SA1 − SA2 st s♦ s s♦♦♥s s♠étrs q ♦♠♦ ♣ ♦srrs ♥ rá s ♦rt ♦♥

s ♦trs í♥s ♥ ♠s♠♦ ♣♥t♦

s r ♦ q ♦t♦r s♥t♦ r♠ó♥ q ♠♦s ♥ st tr♦ s♦r ♦①st♥ trs st♦s

sts ♦s ♦s s♠étr♦s ② rst♥t s♠étr♦ s st♠♥t q ♦r ♦①st♥ ♦

♣rtr s s♦♦♥s s♠étrs rr♦ ①t♠♥t ♠s♠♦ ♦r ♥tr♦ ♣rsó♥ ♥♠ér ♦♥ q s

tr q ♦t♥♦ ♣r st♦ s♠étr♦

♣r ♥s ♦rrs♣♦♥♥t st♦ MA s♦ ♠r♦ ♦♥ ♥ í♥ rs ♥ ♦♥

♣r♥ ♠ás ♣rs ♦rrs♣♦♥♥ts ♥♦s ♦rs r♠♥t♦ ♦s ♣rs q ♣r♥ ♥ st r

r♦♥ ♦s ♣r ♥ r♥r rr ♥q ♥ s♦ st♦ MA t♠é♥ s ó ♣r ♠s♠

r♥r rt ♥♦ ♦♠♦ rst♦ ♠s♠ r

♠str ♣rs ♦s ♣r r♥rs rts ♦rrs♣♦♥♥ts ♦s s♥ts ♦rs r

♠♥t♦ ② í ♥♠♥t s ♠str st♦ MA r ♥tr é♥t♦ ♦ ♣r

r♥rs rrs ♥t♦ ♦s st♦s s♠étr♦s q ♣♥ ♦①str ♦♥ é MS1 ② MS2 ♦s st♦s MA

♦s t♥t♦ ♣r r♥rs rrs ♦♠♦ rts s♥ é♥t♦s s ♥ ♦♥s♥ q♥ ♥tr

Page 130: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 400

10

20

z*

0

10

20

ρ [n

m−3

] 0

10

20 Xe/Na T=245 K MS1

Γl = 2.72

MA Γ

l = 4.53

MS2

Γl = 6.35

r Prs ♥s ♦rrs♣♦♥♥ts ❳ s♦r♦ ♥ ♥ r♥r rt ♦♥stt ♣♦r ♣rs é♥ts t♠♣rtr ③②s③ rtr ❬❪ st♦s ♣rs ♦rrs♣♦♥♥ s trs s♦♦♥s q ♣♥♦①str ♥ r♥r r♦ ♥tr sñ♦ ♦♥ MA ♦rrs♣♦♥ s♦ó♥ s♠étr ♦s ♣rs MS1 ②MS2 s♦♥ s♠étr♦s ♦♦s st♦s ♣rs t♥♥ s♦♦s ♥ tr♠♥♦ ♥ú♠r♦ ♠♦ ♣rtís ♣♦r ♥ ár ♣r s♠étr♦ ♣ ♣♥srs ♦♥stt♦ ♥ ♥ s ♣rs ♣♦r ♦s ♣rs s♠étr♦ss♦r♦s ♥ ♥ s

♦s ♥s♠s ♥ó♥♦ ② r♥ ♥ó♥♦ s s♦♦♥s ♦t♥s ♥tr♦ ♦r♠s♠♦ ♥ó♥♦ ♣rát♠♥t ♥♦

r♥ s q s ♦t♥♥ ♥ r♥ ♥ó♥♦ s♦ ♥ s♦ sst♠s ♠② ♦♥♥♦s q ♠ás ♣♦s♥

♣♦s ♣rtís ♠é♥ s ♦sró q s♦ó♥ s♠étr s s ♣♥s ♦♠♦ ♦♥♦r♠ ♣♦r ♦s ♣♦r♦♥s

♦ s♦rs ♥ ♥ s ♣rs s ♣ ♦t♥r ♦♠♥♥♦ s ♣♦r♦♥s ♦ s♦rs

♥ ♣r ♦rrs♣♦♥♥ts s s♦♦♥s s♠étrs ♦①st♥

♥ s st ♥rí r ♣♦r ♣rtí s s♦♦♥s s♠étrs ♥ ró♥ ♦♥ ♦rrs♣♦♥♥t

s s♠étrs ② s ①♥ rst♦s ♦s t♥t♦ ♣r r♥rs rrs ♦♠♦ ♣r r♥rs rts ♥

♦r♥s s ♦♦ r♥ ♥tr ♥rí r ♣♦r ♣rtí s♦ s♦ó♥ s♠étr ②

s♦ó♥ s♠étr ♥ st rá♦ ♦s ♦rs ♦t♥♦s ♣r r♥rs rrs stá♥ ♥♦s ♦♥ í♥

r②s ② ♦s ♦t♥♦s ♣r s ♠s♠s r♥rs rts ♦♥ í♥ ♣♥t♦s ♥ ♥ st♦r ♦♥ s s♦♦♥s s♦♥

sts ♠s rs s s♣r♣♦♥♥ r♠♥t s ♣ ♦srr ①st♥ ♥ ♥tr♦ s SA1 st

SA2) ♦♥ s s♦♦♥s s♠étrs ♣♦s♥ ♠♥♦r ♥rí q s ♦rrs♣♦♥♥ts s♠étrs ♥ st r s

♠r♦ ♥ ♣♥t♦ q ♦rrs♣♦♥ st♠♥t st♦ ♦①st♥ s♠étr♦ MA

♥ s♦ ♦s st♦s s♠étr♦s MS1 ② MS2 ♣í ♦r♠ s♦r ♣r r♥r ♦♥

rs♣t♠♥t ♦♥ s strtrs ② rs q ♣r♥ ♥ ♦①st♥ ♥♦ s st ♥ó♠♥♦

s♦ró♥ s♦r ♥ ♣r P♦r ♦tr♦ ♦ ♣r MA s ♣ ♦srr ♦①st♥ ♥ ♣í rs ♥

♣r r ♦♥ ♥ s♦r ♣r ③qr

P♦r ♦tr♦ ♦ rr t♠♣rtr ♠♦♦ ♣r ♥ ♦ ♦r ♣♦t♥ qí♠♦ ♦s st♦s s♦♦s

♦♥ ♦r ♠ás ♦ r♥ ♣♦t♥ s ♥ ♣♦r s♦r r ♥♦t ♣♦r CS1 − Mcross − CS2 ② s

strtr ♦rrs♣♦♥ ♥ ♣í ♥♦r♠ q s ①t♥ s♦r ♣♥♦ ♣r♣♥r ③ P♦r ♦ t♥t♦

Page 131: Adsorción de fluidos sobre sustratos sólidos, estudiada

3 3.5 4 4.5 5 5.5 6−0.6

−0.5

−0.4

−0.3

−0.2

−0.1

0

Γl

[f DF(a

s)−f

DF(s

)]/k B

[10−4

K]

Xe/Na T=245 K S

S1

SA1

MA

SA2

r r♥ ♥tr s ♥rís rs ♣♦r ♣rtí ♥ ♥ó♥ t♦r r♠♥t♦ ♦rrs♣♦♥♥t s♦♦♥ss♠étrs ② s♠étrs s t♥t♦ ♣r r♥rs rrs ♦♠♦ rts ③②s③ ② rtr ❬❪ ♥ str fD(as) r♣rs♥t ♥rí r ♣♦r ♣rtí ♦rrs♣♦♥♥t s s♦♦♥s s♠étrs ♠♥trs qfD(s) r♣rs♥t ♠s♠ ♠♥t ♣r♦ ♣r s♦♦♥s s♠étrs ♥ ré♠♥ ♠t♦ ♣♦r SA1 ② SA2 ♣♦t♥ qí♠♦ s s♦♦♥s s♠étrs ① rtr ♣♦st ② ♣♦r ♥ st♦s rst♦s ♦rrs♣♦♥♥ts♥t♦♥s s♦♦♥s sts t♠é♥ s♦♥ ♦t♥♦s t③♥♦ ♦r♠s♠♦ r♥ ♥ó♥♦ r♥rs rts♥ rá♦ s ♥♦ ♥rí st♦ s♠étr♦ MA ú♥♦ st♦ s♠étr♦ ♣♦s ♦♥ s♥t♦ ís♦ q♣r ♥♦ s rs ♣r♦♠ r♥r rt

Page 132: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 5 10 15 20 25

241

242

243

244

245

246

Γl

T [K

]

Xe/Na

Tw

Tcpw

r ♦①st♥ st♦s ❳ s♦r♦ ♥ ♥ r♥r ♣rs é♥ts ③②s③ ② rtr ❬❪s t♠♣rtrs rí♥ ♥tr ♠♦♦ ② rít ♣r♠♦♦ st♦s ♦rs r♦♥ ♦s t♥t♦ ♣rr♥rs rrs ♦♠♦ rts ♦s ír♦s sñ♥ st♦s s♠étr♦s ♠♥trs q ♦s ♠♥ts ♦rrs♣♦♥♥ st♦s s♠étr♦s í♥ ♣♥t♦s r ♠♥♦ ③ s♦♦ ♣r ♠rr t♥♥ q s♥♦s ♦rs ♠ q t♠♣rtr ♠♥t st ♥③r t♠♣rtr rít ♣r♠♦♦ t♦♦s ♦sst♦s ♦♥r♥ ♥♦ s♦♦ q ♣♦s s♠trí ♣♦t♥ ①tr♥♦

♥♦ ② r♣tr s♠trí s♦r s ♣♥♦

♠str ♦ó♥ ♦♥ t♠♣rtr ♦s st♦s ♣rs♥ts ♥ ♦①st♥ ♣r ♥s

t♠♣rtrs ♥tr ♠♦♦ ② rít ♣r♠♦♦ st♦s ♦rs r♦♥ ♦s t♥t♦ ♣r r♥rs

rrs ♦♠♦ rts st ♠♥r ♦ ♣♦st♦ ♥ ♥ s ♣rs ♦rrs♣♦♥♥t st♦s

s♠étr♦s s r♥♥ ♥ s s♣s♦r st q t♠♣rtr ♥③ rít ♣r♠♦♦ ♦♥ s

s♦♦♥s s♠étrs s♣r♥ q♥♦ ♥t♦♥s ♥ s♦♦ st♦ q r s♠trí ♣♦t♥ ①tr♥♦

s♦♦ ♥ ♣♦ró♥ ♦♥ s♣s♦r tr♠♥♦

♦s rst♦s ♦t♥♦s ♣r s s♦tr♠s sst♠ ❳ ♥③♦ rr ♣♥ ①t♥rs ♣rt♠♥t

♣r ♦tr♦s sst♠s ts ♦♠♦ ❳ ♦ ❳ ♦♥ ♣r♥ ♦tr sr ♦♦♣s ♥ r ❲s

♦♥♥♠♥t♦ ó♥

♥ st s♦ ♦♠♥③♠♦s ♥③♥♦ ♥♠♥t ♥s ♣r♦♣s ♦♥r♥♥ts ♦♥ ♠♦♦ ② ♣r♠♦♦

♠♥t st♦ s♦ró♥ ♥ r♥rs ♥ ③ ♣r♦r ♦♠♦ ♥ ♣ít♦ ♦♥ s ♥③ó s♦ró♥

s♦r ♣rs ♥ sí s s♦tr♠s s♦ró♥ ♠♥t s s♦♦♥s s♠étrs q ♣r♥ ♥ r♥rs

② t♠♣rtrs q stá♥ ♣♦r ♥♠ t♠♣rtr ♠♦♦

Page 133: Adsorción de fluidos sobre sustratos sólidos, estudiada

Pr ② s t③r♦♥ r♥rs 40σff ♥♦ ♥ s♦ s t③r♦♥ r♥rs ♠ás ♥s

60σff ♣r tr ♦s t♦s s ♥tr♦♥s ♥tr s ♣ís s s♦rs ♥ s ♣rs ♦♣sts

r♥r

♦♦♥s ♦♥ ♣rs s♠étr♦s ó♥

♥ s ♣ ♦srr ♥ s♦tr♠ s♦ró♥ ♣r sst♠ q ♦rrs♣♦♥ t♠♣rtr

st t♠♣rtr s ♠ás t ♣r ♥ s♦tr♠ st sst♠ ♣rs♥t ♥ ③♦ ♥ r

❲s í s ♠str♥ s s♦♦♥s s♠étrs ♦t♥s t♥t♦ ♣r r♥r rr tr③♦ r②s ♦♠♦ ♣r

♠s♠ r♥r rt tr③♦ ♦♥t♥♦ ♥tr ♦s ♣♥t♦s CS1 ② SS1 sí ♦♠♦ ♥tr SS2 ② CS2 sts rs s

s♣r♣♦♥♥ ró♥ ♥st s ①t♥ ♥tr ♦s ♣♥t♦s s♣♥♦s SS1 ② SS2 ♦s st♦s MS1 ② MS2 stá♥

s♦♦s ♦♥ ♣ís s st♥t♦s s♣s♦rs q ♦①st♥ ♥ qr♦ tr♠♦♥á♠♦ ♥tr♦ r♥r

♦s st♦s ♥tr MS1 ② SS1 ② ♦s ♣rs♥ts ♥tr SS2 ② MS2 s♦♥ ♠tsts ♥ ♥♦ r♥r ♣♥

sr ♥③♦s qr ♦s st♦s ♥tr MS1 ② SS1 s♠♣r ② ♥♦ ♥ ♥♦ r♥r sst♠

♥♦ ♥ st♦ st MS1 ♥á♦♠♥t ♥ ♦ r♥r ♣♥ sr ♥③♦s qr

♦s st♦s ♥tr SS2 ② MS2 s ♥ st ♣r♦s♦ s t♥ ♦ ♣r q sst♠ ♥♦ ♥ st♦ MS2

Pr s♦ r♥r rr ♣♦t♥ qí♠♦ ♦①st♥ s ♦t♥ tr③♥♦ ♥ ♦♥stró♥

① árs ♥ ♦♥ ♥ rt rt ♥ tr③♦ r②s ② ♣♥t♦s ♥ st s♦ ♦r ♣♦t♥

qí♠♦ r♦ s s♦♦ qr ♦s st♦s sts MS1 ② MS2 sñ♦s ♥ rá♦

♥ s♦ ♠s♠ r♥r ♣r♦ ♦r rt ♦s st♦s ♦①st♥ st s ♦t♥♥ ♥♦ st

♠s♠♦ ♦r ♣♦t♥ qí♠♦ r♦ ♥ st s♦ ♣r ♦t♥r ♣♦t♥ ♦①st♥ s rá♦

s♦tr♠ s r③ ♥ ♦♥stró♥ ① t♥♥ts ♦s rst♦s s ♠str♥ ♥

♦♠♦ ♣ ♦srrs st ♦r ♦♥ ♦♥ ♦r ♣♦t♥ qí♠♦ r♦ s♦♦ ♣♥t♦ Mcross

q ♣r ♥ ♥ ♦♥só♥ ♦s st♦s ♥ ♦①st♥ st ♥tr♦ r♥r rr ♦ rt

♣♦s♥ ♠s♠♦ ♦r ♣♦t♥ qí♠♦ r♦

♥ s ró ♣r sst♠ ♥tr♦r r♥ ♥tr ♥rí r ♣♦r ♣rtí fDF ) ② ♦r

♦♦r♥ y ♦rrs♣♦♥♥t ♥ ♥ó♥ n∗ = nσ2ff ♥ ♦①st♥ sts r♥s

♥ r r♦ t s ♣ ♣rr ♥ rá

♥ s ♠str♥ s♦tr♠s ♦rrs♣♦♥♥ts s♦♦♥s s♠étrs ♦t♥s ♥ ♥♦ r♥rs

rrs ② ♦♥ ♦s t♦s s r♦♥ ♣r s t♠♣rtrs ♥s ♥ ♥♦ ♦s

rs♣t♦s rá♦s ♥ ♦s s í♥s rts ♦rrs♣♦♥♥ ♦♥str♦♥s ① árs ♥ ♥♦

st♦s rá♦s s ♣ ♦srr ♦ó♥ ♥ó♠♥♦ ♣r♠♦♦ rtr③♦ ♣♦r ♥ st♦ ♥ ♦r

r♠♥t♦ st ♦r♠ ∆Γl s ♣ ♥tr ♦♥ ♣rá♠tr♦ ♦r♥ q rtr③ st tr♥só♥

s♣r ♥t♦♥s q st ♣rá♠tr♦ ♠♣ ♥ ② ♣♦t♥s t♣♦

∆Γl(T ) = bpw (Tcpw − T )1/2

.

♥ t s ①♣♦♥♥ ♦s ♦rs ♦t♥♦s t♠♣rtrs ♠♦♦ ② rít ♣r♠♦♦ ♦s

♠♥t sts r♥rs ❬♣r r t♠♣rtr ♠♦♦ s t③ó ❪ s t♠♣rtrs ♠♦♦

s st♥ ♣rt♠♥t s q s ♦tr♦♥ tr♥♦ ♦♥ s♦ró♥ s♦r ♣rs ♣ít♦ ♥ ♥t♦

Page 134: Adsorción de fluidos sobre sustratos sólidos, estudiada

−1.2 −1.1 −1 −0.9 −0.8 −0.70

1

2

3

4

5

6

7

∆µ/kB [K]

Γ l

Ne/Li T=38.5 K

CS1

MS1

SS1

SS2

MS2

CS2

r s♦tr♠ s♦ró♥ ♦♥str ♦♥ s♦♦♥s s♠étrs q ♦rrs♣♦♥ s♦r♦ ♥ ♥ r♥r 40σff ♥♦ t♠♣rtr r só s ♦t♥ t♥t♦ ♣r r♥r rr ♦♠♦ ♣r ♠s♠ r♥r rt r r② ♦rrs♣♦♥ s♦♦♥s ♦t♥s s♦♠♥t ♥ r♥rs rrs ♦s♣♥t♦s ♠r♦s ♦♥ SS1 ② SS2 s♦♥ ♣♥t♦s s♣♥♦s ♠♥trs CS1 ② CS1 s♦♥ ♦s st♦s ♥ér♦s s♦♦s ♣ís s r♥ts s♣s♦rs ♦s ♣♥t♦s ♠r♦s ♦♥ MS1 ② MS2 ♦rrs♣♦♥♥ ♦s ♣ís s♥ ♦①st♥ s♣s♦rs r♥ts í♥ rt r②s ② ♣♥t♦s ♦rrs♣♦♥ ♥ ♦♥stró♥ ① árs

−1.2 −1.1 −1 −0.9 −0.8 −0.7−1.81

−1.8

−1.79

−1.78

−1.77

−1.76

∆µ/kB [K]

ω+ /kBT

Ne/Li T=38.5 K

CS1

SS2

Mcross

SS1

CS2

r r♥ ♣♦t♥ ♥ ♥ó♥ ♣♦t♥ qí♠♦ ♣r s♦r♦ ♥ ♥ r♥r rt ♦♥stt ♣♦r ♣rsé♥ts ♥ t♠♣rtr st rá♦ ♦rrs♣♦♥ ♥ ♦♥stró♥ ① t♥♥ts ♣♥t♦ r ♠r♦ ♦♥Mcross ♥ ♦①st♥ ♠s ♣ís r t①t♦ ♥ st rá♦ ω+ = ωσ2

ff

Page 135: Adsorción de fluidos sobre sustratos sólidos, estudiada

0.1 0.15 0.2 0.25 0.3 0.35 0.4

−0.1

0

0.1

0.2

0.3

0.4

1/n*

(f DF−y

)/kBT

[10−3

] Ne/Li T=38.5 K

MS2

MS1

CS2

S

S2 S

S1

CS1

r r♥ ♥tr ♥rí r ② rt y ❬r ♣ ❪ s♦ ♦♥stró♥ ① st♥♥ts ♥ ♥ó♥ 1/n∗ r♥ s ♥ ♥ ♦s ♦rs 1/nmin ② 1/nmax t ♦ rqr

r♦ ♥ ♣rs♥t t s ♥♥ ♦rs t♠♣rtrs ♠♦♦ ② ríts ♣r♠♦♦ ♣r s♦ s♦r♦ ♥ r♥rs ♥s ② Pr s t③r♦♥ r♥rs 60σff ♥♦ ♠♥trs q ♣r ② s ♠♣r♦♥ r♥rs 40σff ♠é♥ s ♠str♥ ♦s ♦rs q t♦♠♥ ♦s ♣rá♠tr♦s apw ② bpw ♦s ♠♦♦s r♣rs♥t♦s ♥ s s ②

Tw [] Tcpw []

apw/kB [−1/2] bpw [−1/2]

s t♠♣rtrs ríts ♣r♠♦♦ ② q t♥r ♥ ♥t q ♥ ♥áss s♦r ♣rs s♦♦ s ♥♦

♥ ♠t s♣r♦r ♣r s r ♣ít♦

♦♦♥s ♦♥ ♣rs s♠étr♦s ó♥

♦♠♥③r♠♦s ♥③♥♦ ♥ ♦r♠ ♥ér ♦s ♣rs s♠étr♦s q ♣r♥ ♥ s♦ró♥ ♥ r♥rs

② ② ♣♦str♦r♠♥t r♠♦s ♥ ♥áss t♦ ♣r ♥ r♥r

①♠♥r♠♦s ♣r♠r♠♥t ♦s s♦tr♠s s♣rs ♣♥s ♥ ♥ r♦ ♦rrs♣♦♥♥ts s t♠♣rtrs

② ♣r ♥ r♥r ♥ s ♠str♥ sts s♦tr♠s q ♥ s♦ ♦♥strs

t♥t♦ ♦♥ s♦♦♥s s♠étrs ♥s ♣♦r í♥s sós ♦♠♦ ♦♥ s♠étrs í♥ r②s ♥ ♠s

s♦tr♠s s s♦♦♥s s♠étrs ♥♥ ♥ ♦s ♣♥t♦s s♣♥♦s q ♦rrs♣♦♥♥ ♦s ♠á①♠♦s rt♦s

sts rs ♥ s♦ s♦tr♠ sts s♦♦♥s s♠étrs s ①t♥♥ ♥ t♦ ♥ r♦♥ ♦♥

Page 136: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.25 −0.2 −0.15 −0.1 −0.05 00

4

8

12

16

∆µ/kB [K]

Γ l

Ne/Rb

(a)

−0.8 −0.6 −0.4 −0.2 0 0

4

8

12

16

∆µ/kB [K]

Γ l

Ne/Na

(b)

−1.4 −1.2 −1 −0.8 −0.6 −0.4 −0.2 0 0

4

8

12

16

∆µ/kB [K]

Γ l

(c)

Ne/Li

36 38 40 42 44−1.2

−1

−0.8

−0.6

−0.4

−0.2

0

T [K]

∆µ/k

B [K

]

(d)

Ne/Alkali Li

Na

Rb Tc

r s♦tr♠s s♦ró♥ r♠♥t♦ s ♣♦t♥ qí♠♦ r♦ ♦rrs♣♦♥♥ts s♦r♦ ♥ r♥rs t♠♣rtrs q ♥ s ♦s trá♥♦s ♦ st ♦s ír♦s ♦♥ ♥ ♣s♦ Pr s t③ó ♥ r♥r 60σff ♥♦ ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ t♠♣rtrs q ♥ s ♦s trá♥♦s ♦st ír♦s ♦♥ ♥ ♣s♦ Pr s ♦♥sró ♥ r♥r 40σff ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ t♠♣rtrs q ♥ s ♦s trá♥♦s ♦st ír♦s ♦♥ ♥ ♣s♦ Pr s ♦♥sró ♥ r♥r 40σff í♥s ♣r♠♦♦ ♣r ♦s sstrt♦s ♥③♦s

Page 137: Adsorción de fluidos sobre sustratos sólidos, estudiada

2 3 4 5 6 7 8

−1.2

−0.8

−0.4

0

0.4

n*

∆µ/k

B [K

]

Ne/Li

(a)

SS1

SA1

SS2

SA2

SA1

SS1

SA2

SS2

2 3 4 5 6 7−4

−3

−2

−1

0

1

2

n*

[f DF(a

s)−f

DF(s

)]/k

BT

[10

−3]

Ne/Li

(b)

SS1

SA1

SS2

SA2

SS1

SA1

SA2

SS2

r rá♦ ♦rrs♣♦♥ ♦s s♦tr♠s sst♠ ♣r s t♠♣rtrs r s♣r♦r ② r ♥r♦r s í♥s ♣♥t♦s rts ♥♥ ♠á①♠♦ ♦r n∗ ♦ s rst s♠trí s s♦♦♥s s♥♦ ♦s rst♥ts ♣♥t♦s s r ♥ t①t♦ ♥ rá♦ s ♠str r♥ ♥tr ♥rí r ♣♦r ♣rtí s s♦♦♥s s♠étrs ② s s♠étrs ♥ ♥ó♥ n∗

♣r ♠s t♠♣rtrs r ♥r♦r ♦rrs♣♦♥ ♥ t♠♣rtr ② s♣r♦r ♥ ♥ ré♠♥ ♠t♦ ♣♦r SS1 ② SA1 ♣♦t♥ qí♠♦ s♦♦ s s♦♦♥s s♠étrs ① ♥rtr ♥t ♣♦r ♥♠ n∗(SA1) st rtr ♥ ♣♦st st♦s rst♦s q s ♦tr♦♥ ♣rr♥rs rrs s ♦t♥♥ t♠é♥ ♥ s♦ r♥rs rts

s s♠étrs s♦♥ ♥sts ♥tr ♦s ♣♥t♦s SS1 ② SS2 Pr st♦ s♣♥♦ ♠á①♠♦ st s♦tr♠

♣♦t♥ qí♠♦ r♦ s ♥t♦ st♦ ♣r♦ q ré♠♥ s♠étr♦ s♣r③ ♥♦ ∆µasym ♥

♦r q ∆µsym t♥ ♥ SS1 Pr ♦tr s♦tr♠ ①st ♥ r♥ tt ♠♣♦rt♥t ♣♦t♥

qí♠♦ r♦ st♦ s♣♥♦ SS1 s ♣♦st♦ ② ♥t♦♥s s s♦♦♥s s♠étrs s ①t♥♥ ♠♥r

t q ∆µasym s ♣r♦①♠ r♦ ② s♠trí ♣rr st q s ♣r♦ ♥ ♦♥♥só♥ s ♣r

♥ s ♣ ♦srr q ♥rí r ♣♦r ♣rtí s s♦♦♥s s♠étrs s ♥r♦r

s s♠étrs ♥ r♥♦ ♥♦ ♣♦r SS1SA1SA2 ♣r ♠s t♠♣rtrs ❱ r s s♦♦♥s s♠étrs

♦♥stt②♥ ♦s st♦s ♥♠♥ts s♦♦s ♦s r♥ts ♦rs n∗

s ♦♣♦rt♥♦ sñr t♠é♥ q ♦ r♦ r r② ♥tr SS1 ② SA1 ♣r ♠s s♦tr♠s s s♦♦♥s

s♦♥ ♥sts dµasym/dn < 0 ♥ ♠r♦ t♦s sts s♦♦♥s ②s ♥rís s♦♥ ♥r♦rs s ♥rís

s s♦♦♥s s♠étrs s♦♥ st③s r ♥ú♠r♦ ♣rtís ♦♠♦ ♦rr ♥ s♦ ♥ r♥r

rr ❬❪

♥ ♦s rá♦s ② s ♠str♥ r♦s ♣rs s♠étr♦s ♦rrs♣♦♥♥ts s♦r♦

♥ r♥rs ② rs♣t♠♥t ♦♥ s ♣ ♦srr ♦♠♦ ♦♦♥♥ sts s♦♦♥s ♥♦ s

♥ ♥♥♦ s r♥rs ♦♥ ♦ ♥ sts rs stá♥ s♦s r♥t ♥ú♠r♦ ♣rtís

♥ ♥♦ st♦s rá♦s s rs tr③♦ rs♦ ♦rrs♣♦♥♥ st♦ s♠étr♦ q s q ♦①st

♦♥ ♦s ♦s st♦s s♠étr♦s rs♣t♦s t♠♣rtr sñ ♥ ♥♦ ♦s

s rs s ♥ í♥ r②s s s♦♥ s s♦♦♥s s♠étrs ♠ás r♥s ♠②♦r ♥ú♠r♦

♣rtís ♦rrs♣♦♥♥ts ♣rs s♦r♦s ♣♦♦ s♣s♦r ♦s ♣rs s♠étr♦s q ♥ ♣rr

♦ st♦s st♦s s♠étr♦s s s s ♦♥♥♦ ♣rtís r♥r stá♥ s♦♦s ♣ís

♠②♦r s♣s♦r q s q ♥♥ sts rs

♥ ♦s rá♦s r s ♠str♥ ♦♠♦ ♠ t♦r s♠trí ♣r ♥s t♠♣rtrs ♦♠♦

♥ó♥ r♠♥t♦ ♦sr♠♦s ♣♦r ♠♣♦ rá♦ í s ♥ ♦ rs s♠trí

♥ s s ♦rrs♣♦♥♥ t♠♣rtrs q ♥ s r ♠ás t ♥ ♣s♦s

♠♦ r♦ st ♠♥r ♣♦r ♠♣♦ ♣r s♦ ♦s ♣rs s♦♦s q s ♠str♥ ♥ s♦

st♦ s♠étr♦ r r② s♦♥ ♥♦s ♦s ♣♥t♦s q ♦♠♣♦♥♥ s♥ r ♦♥t♥♦ s ♦

Page 138: Adsorción de fluidos sobre sustratos sólidos, estudiada

rr q s ①t♥ ♥tr ♦s st♦s ♣rs♥ts ♥tr SA1② SA2 ♦s st♦s SA1② SA2 s♦♥ ♦s ♠s♠♦s q

stá♥ sñ♦s ♥ tr③♦ rs♦ r r♣rs♥t st♦s sts s♦♦♥s q s ♦t♥♥

t♥t♦ ♠♥t ♦r♠s♠♦ ♥ó♥♦ ♦♠♦ ♦♥ r♥ ♥ó♥♦

s rtrísts ♦s sst♠s ② ♥ ♥t♦ strtr ♦s ♣rs ♥s s♦♥

s♠rs s sst♠ Pr sst♠ r♥ ♥♠♥t r ♥ q ♦

♠♥♦r ♥t♥s ♥tró♥ sstrt♦♦ ♦s ♣rs ♥♦ ♣rs♥t♥ ♦s ♣♦s q ♣r♥ ♥ s♦

♦ rtríst♦s ♦r♠ó♥ ♥ strtr ♣s q s ♠♥st ♥ ♦ s♦r♦

r♥♦ ♣r

♥áss s♦ró♥ s♦r ♦♦

♥③ ♦♥ t ♥ s♦tr♠ s♦ró♥ s♦r st s♦tr♠ ♦rrs♣♦♥ t♠♣rtr

st t♠♣rtr s ♠ás t ♣r st sst♠ ① ♥ tr♥só♥ ♣r♠r ♦r♥ s s♦tr♠s

s♦ró♥ s ♥ t♥t♦ ♣r r♥r rt ♦♠♦ ♣r ♠s♠ r♥r rr st♦s rst♦s s

♠str♥ ♥ ♦s rá♦s ♥ rá♦ r q r♦rr ♦s ♣♥t♦s CS1 MS1 SS1 SS2 MS2

② CS2 st s♦ s♦♦♥s s♠étrs ♠♥trs q ♣s ♣♦r SS1 SA1 ② SA2 s ♦t♥ ♣rtr s♦♦♥s

s♠étrs Pr ♥ ♦r r♠♥t♦ s♣r♦r s♦♦ SA2 ♥♦ ①st♥ s♦♦♥s q r♦♠♣♥ s♠trí

♣♦t♥ sstrt♦♦ í♥ rt r②s ② ♣♥t♦s s ♥ ♦♥stró♥ ① ♣rtr

s s♦♦♥s s♠étrs ♦t♥s ♦♥ r♥r rr

♦s st♦s r♣rs♥t♦s ♥ s rs í♥ só ♦rrs♣♦♥♥ ♦s q ♣r♥ ♥ s♦ ♠s♠

r♥r rt Pr r ♥ s♦ r♥r rt ♦s st♦s s♠étr♦s q ♦①st♥ t♠♣rtr

♥ q ♥ r stá♥ r♣rs♥t♦s ♣♦r MS1 ② MS2 s ♥sr♦ rrrr ♥ ♦♥stró♥ ①

t♥♥ts ♥ s ♠str♥ rs ♦rrs♣♦♥♥ts st ♠ét♦♦ ♥ r q s

①t♥ s CS1 st SS1 s ♦rt ♥ ♣♥t♦ ♠r♦ ♦♥ Mcross ♦♥ r q s ①t♥ ♥tr CS2 ②

SS2 s s♦r st ♠s♠♦ rá♦ s tr③ r q ♦rrs♣♦♥ ♦♥stró♥ ① t♥♥ts ♣r

s s♦♦♥s s♠étrs r q s ①t♥ ♥tr SA1 ② SA2 s ♦t♥ q st r ♦rt s ♥tr♦rs

♥ ♠s♠♦ ♣♥t♦ Mcross st ♠♥r st♦ ♠r♦ ♦♥ MA ♦rrs♣♦♥♥t ♥ s♦ó♥ s♠étr

t♥ s♦♦ ♠s♠♦ ♦r ♣♦t♥ qí♠♦ s s♦♦♥s s♠étrs MS1 ② MS2 ♦ ♥ q

♣r s♦ r♥r q ♥ Mcross ♦①st♥ trs st♦s ♥ qr♦ tr♠♦♥á♠♦ ♦s s♠étr♦s

② ♥♦ s♠étr♦ st♦s trs st♦s sts♥

∆µS1(T, ωe) = ∆µS2(T, ωe) = ∆µA(T, ωe = ∆µe(T, ωe) ,

♦♥ µe(T, ωe) = −0,38991 ♦♥ ωe/kBT = −2,22737 ♥♠−2

♣r ♥s ♦ s♦r♦ ♦rrs♣♦♥♥t st♦MA ♣ ♦srrs ♠r♦ ♦♥ tr③♦ rs♦

♥ ② ♥ ♥ rá♦ ♥tr

♠str q s Mcross ♣r ♦r µ ♦s st♦s ♠tsts s♠étr♦s s♠♣r t♥♥

r♥ ♣♦t♥ ♠ás ♦ q ♦s s♠étr♦s P♦r ♦tr♦ ♦ ♣r t♠♣rtrs s♣r♦rs ♠♦♦ ♣r ♥

♦ µ ♦s st♦s q ♣♦s♥ r♥ ♣♦t♥ ♠ás ♦ stá♥ r♣rs♥t♦s ♣♦r ♣♥t♦s ♥ í♥ tr♠♥ ♣♦r

CS1 −Mcross − CS2 ② ♠♦♦ ♠♣ q ♦rrs♣♦♥♥t strtr st♦s st♦s ♦♥sst ♥ ♣ís

s ♥♦r♠s s♦r ♣♥♦ xy P♦r ♦ t♥t♦ ♥♦ s r♦♠♣ s♠trí ♥ st ♣♥♦

s ♥ rá♦ s♠r ♥ st s♦ s ♠str♥ s r♥s fDF −y ♦rrs♣♦♥♥tst♥t♦ st♦s s♠étr♦s ♦♠♦ s♠étr♦s qí µe/kBT = −6,97235 [µ0/kBT (T = = −6,96284] ② ω+

e /kBT =

ωeσ2ff/kBT = −2,22737

Page 139: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 10 20 30 400

10

20

30

40

z*

ρ [n

m−3

]

(a)

Ne/Li T=38 K

0 2 4 6 8 10 120

15

30

45

60

75

90

Γl

∆ N (

%)

(b)

Ne/Li

SA1

SA2

SA2

SA1

0 10 20 30 400

5

10

15

20

25

30

z*

ρ [n

m−3

]

(c)

Ne/Na T=41 K

0 2 4 6 8 10 120

20

40

60

80

Γl

∆ N (

%)

Ne/Na

(d)

SA1

SA1

SA2

SA2

0 10 20 30 40 50 600

5

10

15

20

25

z*

ρ [n

m−3

]

(e)

Ne/Rb T=42.75 K

0 2 4 6 8 10 120

10

20

30

40

50

Γl

∆ N (

%)

(f)

Ne/Rb

SA1

SA2

SA2

SA1

r Prs ♥s s♠étr♦s ♥ ♥ r♥r ♥ t♠♣rtr ♣r rt♦s ♦rs Γl r tr③♦ rs♦ ♦rrs♣♦♥ ♣r s♠étr♦ q ♦①st ♦♥ ♦s ♦s s♠étr♦s r r②sst s♦ ♦♥ ♣r s♠étr♦ ♠tst ♠♥♦r s♣s♦r r t①t♦ t♦r s♠trí ♣r sst♠ ♥ ♥ó♥ t♦r r♠♥t♦ ♣r t♠♣rtrs ♥tr ♦s r s♣r♦r ② ♦s r ♥r♦r ♥ ♣s♦s ♠♦ r♦ s♥♦ ♦s ♣♥t♦s SA1 ② SA2 s ♠s♠♦ q ♣r ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ ♥ t♠♣rtr ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ ♣r ♥ r♥♦ t♠♣rtrs q ♥ s ♦s rs♣r♦r ♦s r ♥r♦r ♥ ♣s♦s ♠♦ r♦ ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ ♥ t♠♣rtr ♦ ♠s♠♦ q ♣r♦ ♣r sst♠ ♣r ♥ r♥♦ t♠♣rtrs q ♥ s ♦s rs♣r♦r ♦s r ♥r♦r ♥ ♣s♦s rt♦ r♦

Page 140: Adsorción de fluidos sobre sustratos sólidos, estudiada

−0.5 −0.45 −0.4 −0.35 −0.3

2

4

6

8

∆µ/kB [K]

Γ l

(a)

Ne/Na T=41 K

CS1

CS2

SS1

SS2

SA1

SA2

MS1

MS2

MA

−0.5 −0.45 −0.4 −0.35 −0.3

−2.24

−2.23

−2.22

∆µ/kB [K]

ω+/k

BT

(b)

Ne/Na T=41 K

CS1

CS2

Mcross

SS1

SA2

SS2

SA1

r s♦tr♠ s♦ró♥ ② r♥ ♥rí r ♥ ♥ó♥ r♠♥t♦ ♣r sst♠ t♥t♦ ♣r s♦♦♥ss♠étrs ♦♠♦ s♠étrs ♥ rá♦ s ♠str ♥ s♦tr♠ ♦rrs♣♦♥♥t ♥ t♠♣rtr í♥ só st ♦♥stt ♣♦r s s♦♦♥s ♦t♥s ♥ ♥ r♥r rt ② r② q ♦rrs♣♦♥ ♠s♠ r♥r ♣r♦ rr s s♦♦♥s s♠étrs ♦rrs♣♦♥♥ r q ♥ ♦s ♣♥t♦s CS1 SS1SS2 CS2 ♠♥trs q s s♠étrs sts s♦s r q ♥ SS1 SA1 SA2 SS2 í♥ rt♥ ♣♥t♦s ② r②s s ♥ ♦♥stró♥ ① q ♦♥t ♦s st♦s s♠étr♦s MS1 ② MS2 ♥ ♦①st♥♦♥ ♥ st♦ s♠étr♦ MA ♥ rá♦ s♥♦ ♦s ♣♥t♦s s ♠s♠♦ q ♣r rá♦ srs q ♦♥t♥♥ CS1SS1 ② SS2CS2 ♦rrs♣♦♥♥ s♦♦♥s s♠étrs ② s q ♦♥t♥♥ SA1SA2

stá♥ s♦s s s♠étrs ♣♥t♦ Mcross ♥ ♦③ó♥ r s trs í♥s ② tr♠♥ ♦①st♥ ♦s s♦♦♥s s♠étrs ② ♥ s♠étr MS1 MS2 ② MA ♠♦strs ♥

♣ ♦srr ♥ rá q s trs rs t♥♥ s ért ♥ r♦ s ♦r♥s ♦♥ ♦①st♥ ♦s

st♦s MS1 MS2 ② MA ♦s ♦rrs♣♦♥♥ts ♣rs s ♠str♥ ♥

♥ s ♠str♥ r♠s s ♦①st♥ st♦s ♣r ♦s sst♠s st♦s í s

tr③r♦♥ trs í♥s rts ♦r③♦♥ts q ♥♥ s t♠♣rtrs ♠♦♦ ② Pr ♥♦

st♦s ♠ts s ♣ ♦srr q ♥ s♦ ♣ ♠ás rs s♣s♦r r t♥t♦ ♥

s♦ s♠étr♦ ♦♠♦ ♥ s♠étr♦ ♥♦ t♠♣rtr s ♣r♦①♠ ♠♦♦ ♥♦ s ♥③

t♠♣rtr rít ♣r♠♦♦ ♦s trs st♦s ♥ ♦①st♥ ♦♥r♥ ♥♦ s♦♦ ♣♥t♦ q ♥ rá♦

s♦ ♠r♦ ♦♥ ♥ str

P♦r út♠♦ ♥ s ♠str ♦ó♥ ♣rs s♠étr♦s ♦♠♦ ♥ó♥ t♠♣rtr ♣r

♥♦s ♦rs ♥ r♥♦ Tw < T < Tssb ♣ ♦srr ♥ s♦s rá♦s ♦♠♦ ♠ q ♠♥t

t♠♣rtr r t♠é♥ s♣s♦r ♣í ♥ ♥ tr♠♥t♦ ♣í ♠ás rs ♣♦st ♥

st s♦ s♦r ♣r r r♥r

s♠♥

♥③♠♦s s♦ró♥ ❳ ② ♥ r♥rs rts ♦♠♣r♥♦ ♥ ♥♦s s♦s ♦♥ ♦s rst♦s ♦t♥♦s

♥ r♥rs rrs

P♥t♠♦s s♦r s ♥str♦s á♦s ①st♥ ♥ ró♥ rt ♥tr ♦s st♦♥s q ♥

♣r♥♣♦ ♣r♥ ♦♠♦ t♦t♠♥t s♦♥①s ♦s rr♠♦s ♣♦r ♥ ♦ s♠trí s s♦♦♥s ♥ s♦

r♥rs ② ♣♦r ♦tr♦ s ♣r♦♣s ♠♦♦ sstrt♦ ♥ stó♥

sí ♠♥t ♥áss ♥str♦s rst♦s ♥♦♥tr♠♦s q s s♦♦♥s st♦ ♥♠♥t ♣♥

Page 141: Adsorción de fluidos sobre sustratos sólidos, estudiada

0.1 0.13 0.16 0.19 0.22 0.25 0.28

0

0.04

0.08

0.12

0.16

1/n*

(f DF−y

)/kBT

[10−3

] Ne/Na T=41 K

MS2

MA M

S1

CS2

CS1

SS2

SS1

SA1

SA2

(a)

0 5 10 15 20 25 30 35 400

10

20

z*

0

10

20

ρ [n

m−3

] 0

10

20

30 Ne/Na T=41 K M

S1 Γ

l=1.83

MA Γ

l=3.76

MS2

Γl=5.70

(b)

r ♥ rá♦ s ♣ ♦srr r♥ fDF − y ♦♥ y = µe + ωen

−1 ♥ ♥ó♥ 1/n∗ ♣r ♥r♥r ♥ ♦♥ ♥ t♠♣rtr s♥♦ ♦s ♣♥t♦s s ♠s♠♦ q st r♥ s ♥ ♥ ♦s ♦rs Γ s♦♦s ♦s st♦s q ♦①st♥ ♥ qr♦ tr♠♦♥á♠♦s s♠étr♦s ② ♥♦ s♠étr♦ ♥ rá♦ ♥r♦r s ♠str♥ ♣rs ♥s ♦rrs♣♦♥♥ts ♠s♠♦sst♠ ② ♠s♠ t♠♣rtr ♦s ♠r♦s ♦♥ MS1 ② MS2 ♦rrs♣♦♥♥ s♦♦♥s s♠étrs ② ♠r♦♦♥ MA ♥ s♦ó♥ s♠étr Pr r③r st♦s á♦s s t③ó t♥t♦ ♦r♠s♠♦ ♥ó♥♦ ♦♠♦ r♥♥ó♥♦

Page 142: Adsorción de fluidos sobre sustratos sólidos, estudiada

0 4 8 12 1635

37

39

41

43

45

Γl

T [K

]T

w(Rb)

Tcpw

Rb

Tcpw

Tw(Na)

Na

Tcpw

Tw(Li)

Li

Ne Tc

r r♠ s ♦rrs♣♦♥♥t ♦①st♥ st♦s s♦r♦ ♥ r♥rs ② t♠♣rtrs Tw < T < Tcpw ♦s ír♦s stá♥ s♦♦s st♦s s♠étr♦s ♠♥trs q ♦s ♠♥ts st♦s s♠étr♦s s í♥s ♣♥t♦s ♥ s♦ s ♠♥♦ ③ ♦♥ ♥ ♥r t♥♥ ♦♥♥t♦ ♣♥t♦s ♦s st♦s t♥♥ ♥ ú♥♦ st♦ ♥♦ t♠♣rtr s r rít ♣r♠♦♦♦♥ s rstr s♠trí s s♦♦♥s st ú♥♦ st♦ s♦ ♥♦ ♦♥ ♥ strs í♥s ♦r③♦♥ts ♠r♥ s ♦rrs♣♦♥♥ts t♠♣rtrs ♠♦♦ ♣r ♥♦ ♦s sstrt♦s

010

2030

40

36.537

37.538

38.539

0

10

20

30

40

50

z*T [K]

ρ [n

m−

3 ] Ne/Li

r Prs ♥s s♦r♦ ♥ ♥ r♥r ♦♠♦ ♥ ♥ó♥ st♥ z∗ ♥ s ♣rs♣r rt♦s ♦rs t♠♣rtr st♦s t♦s ♦rrs♣♦♥♥ á♦s r③♦s ♠♣♥♦ t♥t♦ r♥rs rts♦♠♦ rrs

Page 143: Adsorción de fluidos sobre sustratos sólidos, estudiada

r♦♠♣r s♠trí ♥ ♣♦r ♥♠ t♠♣rtr ♠♦♦ ♣r ♥ tr♠♥♦ r♥♦ ♥ss ② q

♣♦s st r♣tr s ①t♥ ♥♦ ♠ás á t♠♣rtr rít ♣r♠♦♦

trr ♦♥ r♥rs rts ♥♦♥tr♠♦s q ♥t♦ s ts s♦♦♥s s♠étrs ♣ ♦①str ♥

st♦ s♠étr♦ st rst♦ st ♠♦♠♥t♦ ♥♦ s♦ r♣♦rt♦

Pr sst♠s rsts ♦t♠♦s ♦s r♠♥s ♠♦♦ r♣♦rt♦s ♥ trtr ♦♥ ♠♥t ♠♦

ó♥ s ♥tr♦♥s ♦sstrt♦ s r♣r♦í rt strtr í♥s ♣r♠♦♦

♥♦♥tr♠♦s s♦♦♥s sts s♠étrs tr♥♦ ♦♥ r♥rs ♥♦sts ♣♥s 15σff ♥♦

t♠♦s s trs ss ♣rs q s r♣♦rt♥ ♥ ♦rí s ❬ ❪

str♦s rst♦s ♠str♥ q ♦s t♦s ♣rs ♦♠♥③♥ sr ♠♣♦rt♥ts ♣r r♥rs ♥♦ ♠♥♦r

♦s 12σff

♥③♠♦s r♦ ♥♥ q t♥ ♥♦ r♥r ♥ s♠trí ♣r ♥s ♣r ♦

s r♦♥ ♦ á♦s ♥ r♥rs rs♦s ♥♦s

Page 144: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♣é♥

P♦t♥ ❲

strtr ♥ ♦ ♥♦r♠ st s♥♠♥t tr♠♥ ♣♦r ♣rt r♣s ♣♦t♥ ♥tr♠♦

r P♦♠♦s ♠♥r ♦ ♦♠♦ ♦r♠♦ ♣♦r srs rs q ♥trtú♥ ♠♥t ♥ ♣♦t♥ tr♠♥♦

♣♦r ♠♣♦ ♥ ♣♦t♥ ♥♥r♦♥s ♦ st ♣♦t♥ trt ♦ r♣s ñ s♦♠♥t ♣

qñs ♦rr♦♥s ♦♠♣♦rt♠♥t♦ ♥r♦ ♣♦r ♥ú♦ r♣s♦ P♦r ♦♥s♥t sr ♣♦s trtr

♦ ♣♦t♥ ♦♠♦ ♥ ♣rtró♥ q tú s♦r ♦ q ♠r♠♦s sst♠ rr♥ q s q

♥ q ♣♦t♥ ♥tró♥ ♥tr ♣rtís st ♦r♠♦ s♦♠♥t ♣♦r ♥ú♦ r♣s♦ sst♠

rr♥ ♣ str ♥t♦♥s ♦♥stt♦ ♣♦r ♠♣♦ ♣♦r ♥ ♦ srs rs ♦ q s s ①tr♦

rr♥ ❬❪

r♦ st ♠♦♦ s♣♦♥♠♦s q ♥rí ♥tró♥ ♥tr s N ♣rtís q ♠r♠♦s

Φ(r1, r2, .......rN ) s ♣ ①♣rsr ♦♠♦

Φ(r1, r2, .......rN ) = Φ0(r1, r2, .......rN ) + Φ1(r1, r2, .......rN )

♦♥ Φ0 s ♦♥tró♥ ♣r♦♥t ♥ú♦ r♣s♦ ♣♦t♥ ② Φ1 s ♦rrs♣♦♥♥t ♦♥tró♥

♦ ♣♦t♥

tr♠♦s ♥tr♦ ♦♥t①t♦ ♥ó♥♦ ♦♠♦ ♠♦s ♥ ♣t♦ ♣rt ♦♥r♦♥ ♥rí

r ♠♦t③ FN (V, T ) q r♦♥ ♥ó♥ ♣rtó♥ ♥ó♥ ZN (V, T ) ♠♥t s♥t

①♣rsó♥

e−βFN (V,T ) =ZN (V, T )

N !=

1

N !

ˆ

dr1dr2dr3.......drN exp(βΦ(r1, r2, .......rN ))

s ♦ ♠♠♦s Z0N (V, T ) ② F 0

N (V, T ) ♥ó♥ ♣rtó♥ ♥ó♥ ② ♥rí s♦ sst♠

rr♥ rs♣t♠♥t ♣♦♠♦s srr

e−βF 0

N (V,T ) =Z0N (V, T )

N !=

1

N !

ˆ

dr1dr2dr3.......drN exp(βΦ0(r1, r2, .......rN ))

Page 145: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥ó♥ stró♥ N r♣♦s ♥♦r♠③ q sr sst♠ rr♥ srá ♠ f0N (r1, r2, .......rN )

st ♥ó♥ s q ♥ ♣r♦♠♦ ♥ r ♥♠ qr A ♥ s♥t♦ q

〈A〉 =ˆ

dr1dr2dr3.......drN f 0N(r1, r2, .......rN)

♦ st ♥♦♥ str♦♥ s ♣ srr ♦♠♦

f0N (r1, r2, .......rN ) =1

N !0N (r1, r2, .......rN )

e−βΦ0(r1,r2,.......rN )

Z0N (V, T )

♦♥ 0N r♣rs♥t ♣r♦ ♥♦♥trr s ♣rtís st s♦ sst♠ rr♥ ♥ ♥t♦r♥♦s

s ♣♦s♦♥s r1, r2, .......rN st ①♣rsó♥ s q

e−βΦ0(r1,r2,.......rN ) = Z0N (V, T )f0N (r1r2rN )

② t♥♥♦ ♥ ♥t ♣♦♠♦s srr

e−βFN (V,T ) = e−βF 0

N (V,T )

ˆ

dr1dr2dr3.......drN f 0N(r1, r2, .......rN)e−βΦ1(r1,r2,.......rN ) =

= e−βF 0

N (V,T )⟨

e−βΦ1(r1,r2,.......rN )⟩

♦♥ ♠♦s ♥♦ ♣r♦♠♦ ♠♥t stró♥ ♥♦r♠③ f0N (r1, r2, .......rN )

P♦r ♦tr♦ ♦ ♣♦♠♦s srr⟨

e−βΦ1(r1,r2,.......rN )⟩

= exp∞∑

n=1

(−β)nn!

Cn

♦♥ Cn s ♥♦♠♥♦ ♠♥t ♦r♥ ♥ t♦rí str♦♥s ①st♥ ①♣rs♦♥s ①♣íts

st♦s ♠♥ts ♥ tér♠♥♦s r t♦r Φ1 ♥ ♥str♦ s♦ P♦r ♠♣♦

C1 = 〈Φ1〉

C2 =⟨

Φ21

− 〈Φ1〉2

C3 =⟨

Φ31

− 3 〈Φ1〉⟨

Φ21

+ 2⟨

Φ21

s ♦t♥ sí s♣és t♦♠r ♦rt♠♦s

FN (V, T ) = F 0N (V, T ) + Φ1(r1, r2, .......rN )− β

2

[

Φ21

− 〈Φ1〉2]

+ .............

♣♦t♥ s t♦ ♣rs s r s s s♣r♥ s ♥tr♦♥s ♠ás ♦s r♣♦s ♥t♦♥s s

♣♦t♥ ♥tró♥ ♦s ♣rtís q s♦♠♣s♠♦s ♥ ♥ ♣rt s♦ sst♠ rr♥

φ0(r12) ② ♦tr s♦ ♣rtró♥ φ1(r12) r ♦ ♣♦t♥ ♥ st s♦ s♥♦

s♠♥♦ ó♥ ♥tr♦r s ♣ ①♣rsr ♥ tér♠♥♦s ♥ó♥ stró♥ r sst♠

rr♥ Pr r♦ st t♥r ♥ ♥t q ♥trr ♦♥ ♥ ♦t♥r ♣r♦♠♦ Φ1(r1, r2, .......rN )

♥♦s ♣rrá s ♦♥tr♦♥s t♦s s N(N −1)/2 ♣rs ♣rtís q ♦♥♦r♠♥ ♦ st

♠♥r ♦t♥♠♦s

〈Φ1(r1, r2, .......rN )〉 = 1

2N(N − 1)

ˆ

r1r2φ(r12)ˆ

dr1dr2dr3.......drN f 0N(r1, r2, .......rN) =

=1

2

ˆ

dr1dr2φ1(r12)20(r12) =

1

2Nρ

ˆ

drφ1(r)g0 (r)

♥ st ①♣rsó♥ ρ s ♥s ♦ ② g0(r) s ♥ó♥ stró♥ r s♦ ♦

rr♥ st út♠ ①♣rsó♥ ♥♦ s ♠s q ♦♥tró♥ ♣r♠r ♦r♥ ♥rí r íq♦

Page 146: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥♦r♠ ①♣rsó♥ s á♠♥t ♥tr♣rt ② q st♠♦s ♣rt♥♦ s♣♦só♥ q strtr

♦ st tr♠♥ ♣♦r ♣rt r♣s ♣♦t♥ ♣♦r ♦ t♥t♦ ♦ q st ♥ s♣♦♥♠♦s s st♠♥t

q ♥ó♥ stró♥ r ♦ s ♣rs♠♥t g0(r) ①♣rsó♥ ♥tr♦r ♥♦ s ♥t♦♥s ♦tr

♦s q ♥rí ♥tró♥ ♦t♥ s♠♥♦ s♦r t♦♦s ♦s ♣rs ♣rtís ♥rí ♣r

♣s♥♦ ♦♥ ♣r♦ q t ♣r ①st s♥♦ ♦r♥ ♣rtr♦♥s qí r♣rs♥t♦ ♣♦r

trr s♠♥♦ s ♠② ♦♠♣♦ ♣r sr ①♣rs ♥ tér♠♥♦s ♥ó♥ ♦rró♥ ♥♦s q♠♦s

♣r♠r ♦r♥ ♣♦♠♦s srr ♥rí r ♦♠♦

FN (V, T ) = F 0N (V, T ) +

1

2Nρ

ˆ

drφ1(r)g0 (r)

st ó♥ s ①tr♠♠♥t út ♦r tr♠♥r s ♣r♦♣s tr♠♦♥á♠s ♥ íq♦ ♣rtr

♦♥♦♠♥t♦ ♣♦t♥ ♥tró♥ ♥tr s ♣rtís q ♦ ♦♥stt②♥ ♥ s♦ s♣♦♥r

♥rí r ② ♥ó♥ stró♥ r sst♠ rr♥ P♦r st r③ó♥ ♥ sst♠ rr♥

♦♥♥♥t s ♥ ♠♦♦ s srs rs ♣s ♠s ♣r♦♣s s ♦♥♦♥ ♠② ♥ ♣r st sst♠

rt♦s ♠♦♦s ♣♦t♥ ♦♥♥ ♠♥r ♥tr st stó♥ st s s♦ ♣♦t♥ ♣♦③♦

r♦ ♦ ♥ ♣♦t♥ sr r ♦♥ ♦ trt ♣s ♥ st♦s s♦s s ♥tr t♦♠r ♣rt sr

r ♦♠♦ ♣♦t♥ rr♥ ② ♦ ♦♠♦ ♣rtró♥ ♥ ♠r♦ ♠♦♦s ♣♦t♥ ♠ás rsts

♦♠♦ ♥♥r♦♥s r♥ ♥ ♥ú♦ r♣s♦ r♦ ♠♦♦ q ♥♦ ①st ♥ s♣ró♥ ♥tr ②

ú♥ ♣♦t♥ ♥t♦♥s ♣

rqr ♦s ♣s♦s ♦♥s ♥♣♥♥ts ♥tr s ♥♣♥♥ts ♣r♦①♠ó♥ q s♥

s♦ st ①♣rsó♥

③r ♥ ♣rtó♥ rtrr ♣♦t♥ ♥ ♥ ♣rt rr♥ φ0(r) ② ♥ ♣rtró♥ φ1(r)

♣r♦①♠r ♣♦t♥ rr♥ φ0(r) ♣♦r ♥♦ sr r ♦♥ á♠tr♦ t♦ d q sr

♦t♥♦ ♥ ♠♥r ♠♦♦ q ♥rí r ② t♠é♥ ♥ó♥ stró♥ r sst♠

rr♥ s ♣r♦①♠♥ ♥ ♦ srs rs á♠tr♦ d

st♥ts ♠♥rs r③r ♦s ♣s♦s ② ♦♥♥ st♥ts t♦rís q ♥t♠♥t ♥ st♥t♦s rst♦s

♥♦ s ♣♥ ♠s♠♦ ♠♦♦ ♣♦t♥ ♥tr♠♦r ♦s ♦s ♠♦♦s ♠s r♥ts s♦♥ s t♦rís

rr ② ♥rs♦♥ ② ❲s♥r♥rs♥ ❲ r rr♥s ❬❪ ② ❬❪

♥③♠♦s ♦r st út♠♦ ♣♥t♦ ♦♥sr♠♦s ♥t♦♥s ♥ ♣♦t♥ φ0(r) q s rt♠♥t r♣s♦ ♣r♦

♦♥t♥♦ ♥ st s♦ t♦r ♦t③♠♥♥ e−βφ0(r) q ♥♦♠♥r♠♦s e0(r) t♥ ♦r♠ q s

♠str ♥ rá♦ s♣r♦r ② ♥♦ s ♠② r♥t ♥ ♣♦t♥ q ♠♠♦s ed(r) ♦rrs♣♦♥♥t

♥ ♣♦t♥ srs rs ♦♥ á♠tr♦ s srs s d rá♦ ♥tr ♠s♠ r s♠♣r

② ♥♦ ♦r d st ♦♥♥♥t♠♥t ♦ P♦r ♦ t♥t♦ s ♠♦s ♣r♦♣♠♥t ♦r st

á♠tr♦ t♥r♠♦s q ♥t

∆e(r) = e0(r)− ed(r)

srá st♥t r♦ ♦♠♦ s ♠str ♥ r s♦♦ ♥ ♥ ♣qñ♦ ♥tr♦ q ♠r♠♦s ξd ♥ó♥

∆e(r) s ♦♥♦ ♦♥ ♥♦♠r ♥ó♥ ♣ ♥t♦♥s s ♦♠♦ s♣♦♥♠♦s ξd s ♣qñ♦ ♣♦♠♦s ♣♥sr

♥ r ♥ srr♦♦ ♥ ♣♦t♥s ♥ tér♠♥♦s ξd ♦ ♠s ♦♥♥♥t s srr♦r

A =−βFexc

V

♦♥ ♥♠♦s ①s♦ ♥rí r ♦♠♦

Fexc = −kBT lnZN (V, T )

V N

st ♦r♠ srr♦♦ s ♣ srr s♥t ♠♥r

Page 147: Adsorción de fluidos sobre sustratos sólidos, estudiada

r ♥ rá♦ s♣r♦r s ♠str ♦r♠ q ♣♦s t♦r ♦t③♠♥♥ e0(r) ♦rrs♣♦♥♥t ♥ ♣♦t♥rt♠♥t r♣s♦ ♣r♦ ♦♥t♥♦ ♥ó♥ ♥♦ s ♠② r♥t ♥ ♣♦t♥ q ♠♠♦s ed(r) ♦rrs♣♦♥♥t sr r ♦♥ á♠tr♦ sr s d rá♦ ♥tr ♠s♠ r út♠♦ rá♦♠str ♦r ∆e(r) = e0(r)− ed(r)

A = Ad +

ˆ

drδA

δe(r)|e=ed ∆e(r)+

+1

2

ˆ ˆ

drdr′δ2A

δe(r)δe(r′)|e=ed ∆e(r)∆e(r′) + ............

♦♥ Ad♦rrs♣♦♥ sst♠ srs rs ♥♥♦ ♥ ♥t ♥ó♥ ①s♦ ♥rí r

♠ás ♦♥sr♥♦ q ♦r♠s♠♦ ♥♦♥ ♥s s s♣r♥ qδFex

δφ(r)=

1

2ρ2g(r)

s δA

δe(r)=

1

2ρ2gN (r)eβφ(r)

♣♦r ♦ t♥t♦ s ♣ rsrr ♦♠♦

A = Ad +1

2ρ2ˆ

dr g0N (r)eβφ0(r)∆e(r) + ........

♦♥ s♣r♥ ♥ q sts ♥ts stá♥ s♦s sst♠ rr♥

♥ st út♠ ①♣rsó♥ s ♥ s♣r♦ tér♠♥♦s s♣r♦rs ♣r♠r ♦r♥ ♣s ♥②♥ ♥♦♥s

stró♥ ♠ás ♦s ♣rtís q ♥ ♥ á♦ tér♠♥♦ ♣r♠r ♦r♥ ó♥

s ♦r♥ ξd ♣s ∆e(r) ♦ s ♣r ♥t♦♥s ♥ ♥ ó♥ t♦♠r ♦r d ♣r q st

tér♠♥♦ s ♥ st ♦♥stt② rtr♦ t♦rí ❲ ♣r á♠tr♦ t♦ sr r P♦r ♦ t♥t♦

♥ st t♦rí á♠tr♦ s ♦t♥ rs♦rˆ

dr g0N (r)eβφ0(r)∆e(r) = 0

Page 148: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥rí r ♥ ♥ ♣♦r

A0 = Ad

ó♥ ❲ ♥♦ s ú♥ ♣♦s Pst♦ q ∆e(r) s ♥♦ ♥ s♦♦ ♥ ♥ ró♥ ♠② str r♦r

r = d ♣♦♠♦s r ♥ srr♦♦ ②♦r t♦r r2g0N (r)eβφ0(r) q ♣r ♥ ♥tr♥♦ tér♠♥♦

r♦

r2g0N (r)eβφ0(r) = σ0 + σ1

( r

d− 1)

+ σ2

( r

d− 1)2

+ ...........

♦♥σmdm

=

(

dm

drmr2g0N (r)eβφ

0(r)

)

r=d

sstt②♥♦ ♥ ♦t♥♠♦s∞∑

m=0

σmm!

Im = 0

♦♥

Im =

ˆ

0

d( r

d

)

∆e(r)( r

d− 1)m

=

− 1

m+ 1

ˆ

0

dr( r

d− 1)m+1 d

dr

(

e−βφ0(r))

φ0(r) r rá♣♠♥t ♦♥ r r q ♣r ♥ ♥tr♥♦ st ♥ó♥ s ♥ó♥ t

♥tr ♥ r = d ② st ♠♥r sr q ♣r ♥ ♦♥r rá♣♠♥t t♥♠♦s ♥t♦♥s

s♦♦ ♣r♠r tér♠♥♦ ♠♦♦ q ♦♥ó♥ ♣r ♦t♥r á♠tr♦ t♦ sr r s I0 = 0 ♦

d =

ˆ

0

dr(

1− e−βφ0(r))

st út♠ s ①♣rsó♥ á♠tr♦ t♦ ♣r t♦rí ♥ s♦ ♣rtr ♣r♦ ♠② s q

♣♦t♥ rr♥ t♥ ♦r♠ ♣♦t♥ ♥rs st♥ ♥tr♠♦r ♦ s

φ0(r) = ε(σ

r

)n

♦♥ ε s ♥ ♦♥st♥t ♥tr t♥ ①♣rsó♥ ♥ít rst♦ s

d = σ

(

ε

kBT

)1/n

Γ

(

n− 1

n

)

= σ

(

ε

kBT

)1/n

(1 +γ

n+ .......)

♦♥ γ = 0,5772.... s ♥♦♠♥ ♦♥st♥t r

♣r♥♣ r♥ ♥tr s ♣rsr♣♦♥s ❲ ❬ ❪ ② ❬ ❪ s q st út♠ r ♥

á♠tr♦ sr r q ♣♥ s♦♠♥t t♠♣rtr ♠♥trs q á♠tr♦ ❲ ♣♥ t♥t♦

t♠♣rtr ♦♠♦ ♥s st ♠②♦r ① ♥ ♥ ♥r q t♦rí ❲ s ♥ ú♥

s♥t♦ ♠ás ♦♠♣t q

Ps♠♦s ♦r ♥③r ♦♠♦ s♣rr ♣♦t♥ φ(r) ♥ ♥ ♣rt rr♥ φ0(r) ② ♥ ♣rtró♥ φ1(r)

♦ ♥ ♣♦t♥ ♥♦ ①st ♥ ú♥ ♠♥r r st♦ ♥ ♣r♥♣♦ ♣rrí q st rtrr ♥tr♦

♥ t ♦♥ ♥ t♦rí ♣r♦ ♣♦r ♦♥trr♦ ① ①tr q ♥tr♦ ♦r♠ rtrr

♣♥tr st ♣rtó♥ ♣r♠t ♠♥t ♥ ó♥ ♣r♦♣ ♣♦r ♠♦rr sst♥♠♥t ♦♥r♥

sr ♣rtrt ♦♠♠♦s ♠♦♦ ♠♣♦ s♦ ♣♦t♥ ♥♥r♦♥s st ♣♦t♥ r

♥ ♥ú♦ ♥♥t♠♥t r♣s♦ ♣♦r ♦ t♥t♦ s ss♣t sr s♣r♦ ♦♥ t♦t rtrr ♦r

①♣rsr♦ ♥ ♦s tér♠♥♦s ♣r♦s

Page 149: Adsorción de fluidos sobre sustratos sólidos, estudiada

r P♦t♥ ♥♥r♦♥s ♦rt♦ trs ♦r♠s r♥ts r s ♥ ♣r♦♣st rr② t③ sñ ♦♥ s ♣rtó♥ q ♣r♦♣♦♥♥ rr ② ♥rs♦♥ ② s q ♦rrs♣♦♥ t♦rí ❲ ♥ ♠♦♦ s tér♠♥♦ r−12 ♦♠♦ ♣♦t♥ rr♥ ② ♦ q s♥ ♥ó♥ r−6 q s t♦♠ ♦♠♦ ♣rtró♥ ♣r♦♣st ♦♥sst ♥ t♦♠r ♦♠♦ ♣♦t♥ rr♥ ♣rt ♣♦st ♣♦t♥ ♥♥r♦♥s r r < σ ♠♥trs q ♣rtró♥ ♦♥sst ♥ ♣rt♥t ♦ ♣♦t♥ r > σ ♥ ♣r♦♣st ❲ ♣rtó♥ s ♣♦r r ♣♦t♥ ♦♥st ♣rtó♥ s ♦♥s q ♣rtró♥ rí ♠♦ ♠ás ♥t♠♥t í ♦♥ ♥ó♥ stró♥r ♣rs♥t ♥ ♠á①♠♦ ♦

♥ s r♣rs♥t ♦♥ ♥ í♥ ♦♥t♥ ó♥ ♣r ♣♦t♥ rr♥ ② ♦♥ ♥ tr③♦s

ó♥ ♣r ♣rtró♥ ♥ ♥ s trs ♣♦ss q s ♣rs♥t♥

♦♣ó♥ s rr ② t③ ♦♣ó♥ s ♣rtó♥ ② s q ♦rrs♣♦♥

❲ ♥ ♣r♠r s s tér♠♥♦ r−12 ♦♠♦ ♣♦t♥ rr♥ ② ♦ q s♥

♥ó♥ r−6 q s t♦♠ ♦♠♦ ♣rtró♥ ♦s rst♦s ♣r ó♥ st♦ ♦ ♥♥r♦♥s

♦t♥♦s ♦♥ st ♠♦♦ s♦♥ ♣t♠♥t ♥♦s ♦♠♣r♦s ♦♥ s s♠♦♥s ♥♦ t♠♣rtr s

s♥t♠♥t t T∗ = kBT/ε ≥ 3 ♣r♦ ♠♣♦r♥ ♥♦t♠♥t ♠ q t♠♣rtr s♥ st♦

s ♥t♥ ♣s ♦♠♦ s ♦sr ♥ r ♣♦t♥ rr♥ s ♥♦t♠♥t ♠ás ♥♦ ② ♣♦r ♦

t♥t♦ r♥t ♥ sr r q q ♦rrs♣♦♥ ♣♦t♥ r ♥ ró♥ ♠ás ♠♣♦rt♥t s r

r♥ ♠í♥♠♦ ♣♦t♥ ♦♥ ♦♥tró♥ ♥rí r s ♠②♦r

♣r♦♣st ♦♥sst ♥ t♦♠r ♦♠♦ ♣♦t♥ rr♥ ♣rt ♣♦st ♣♦t♥ ♥♥r♦♥s

r r < σ ♠♥trs q ♣rtró♥ ♦♥sst ♥ ♣rt ♥t ♦ ♣♦t♥ r > σ á♠tr♦

s s♥♦ ♣rsr♣ó♥ ①♣ ♥ts ♦♥tró♥ ♣rtró♥ ♥rí r s ♦t♥

♣rtr ♦♥ g0(r) = gd(r)

♥♦ s t③ st t♦rí ♣r ♦t♥r s ♣r♦♣s tr♠♦♥á♠s ♦ ♥♥r♦♥s rst♦

s ♠② ♥♦ ♥q ♠♣♦r ♥ss ② t♠♣rtrs r♥s ♣♥t♦ tr♣ s s♦♦♥s ♠♦r♥

♥♦t♠♥t s s r ♥ tr♠♥♦ ♣rtrt♦ s♥♦ ♦r♥ st ♦ t♠é♥ s ♣ ♥t♥r ♥tt

♠♥t s t♥♠♦s ♥ ♥t q ♣rtó♥ ♥② ♥ ♣rtró♥ ♣rt rá♣♠♥t ♠♥t

♣♦t♥ q s r = σ st ♠í♥♠♦ ♥ rm = 21/6σ ♥ st r♥♦ st♥s s st♠♥t ♦♥

♥ó♥ stró♥ r srs rs ♥③ s ♦r ♠á①♠♦ ② ♣♦r ♦♥s♥t s t♦♥s

Page 150: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥rí ♣rtrt t♦t s♦♥ r♥s P♦r ♦ t♥t♦ s♥♦ ♦r♥ ♣rtr♦♥s sr ♠♣♦rt♥t ❬

s♥♦ ♦r♥ ♣r♦♣♦r♦♥ ts t♦♥s ♦rrs♣♦♥ trr s♠♥♦ ❪ st ♠♥r

♣r♦♣st s ♥ ♥♦ s ♦♠♣r ♦♥ ♦s rst♦s s♠♦♥s ♣r♦ s♦♦ s s ♥② ♥

s♥♦ ♦r♥ ♣rtrt♦ ♥s ♥r ♥ s♥♦ ♦r♥ s ♠♥ s s ♠♦♦ ❲ ♥

st s♦ ♣♦t♥ s ♥ r = rm ② s t♦♠

φ0(r) =

φLJ(r) r < rm

0 r > rm

φ1(r) =

−ε r < rm

φLJ(r) r > rm

♦♥ st ♣rtó♥ s ♦♥s q ♣rtró♥ rí ♠♦ ♠ás ♥t♠♥t í ♦♥ ♥ó♥ stró♥

r ♣rs♥t ♥ ♠á①♠♦ ♦ st ♦r♠ ♥ st sq♠ ♣r♠r ♦r♥ ♣rtrt♦ s ♦♥s♥

rst♦s t♥ ♥♦s ♦♠♦ ♦s q s ♦t♥♥ ♥ ♠♦♦ ♦♥ s♥♦ ♦r♥ ♣rtr♦♥s ♥s

♣r st♦s tr♠♦♥á♠♦s ♣ró①♠♦s ♣♥t♦ tr♣

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Page 152: Adsorción de fluidos sobre sustratos sólidos, estudiada

♣ít♦

♦♥s♦♥s

♠♦s ♣rs♥t♦ ♥ ♣r♦♠♥t♦ ♥♦♦s♦ st ♥♦♥ ♥s q ♥♦s ♣r♠tó ♣rr

♥ ♦♥t①t♦ s ♦rís ♥♦♥ ♥s rss ♣r♦♣s s♦s ♦♥ ♦s s♠♣s

♦♥stt♦s ♣♦r ss ♥♦s rs ♦ s♦r♦s s♦r sstrt♦s só♦s ♣rs ♣♥s ♦ r♥rs ♦♥stts ♣♦r

♠♥t♦s ♥♦s ② ♥♦s ♦tr♦s ♠♥t♦s ♦ ♦♠♣st♦s

♥ st tss ♣r♦♣♦♥♠♦s ♥ ♣r♦♠♥t♦ st ♥♦♥ ♦♥ r♦ ♥ tér♠♥♦ ♦♥

♥♦ ♥♦♥ s ♦♥str② ♥t♦♥s t♥♥♦ ♥ ♥t ♦ s♥t

P♦r ♥ ♦ s t③ó ♥ ♣♦t♥ ♣rs t♦ q s ♦t♥ ♦♣t♠③♥♦ ♦s ♣rá♠tr♦s ♣♦t♥

♣rs ❲s ♥r ② ♥rs♥ r ❬❪ ② ♣é♥ st st ♣♦t♥ ♣rs q

ss ♣rá♠tr♦s ♣r♦♥ ♣♦t♥ ② á♠tr♦ r♦③♦ át♦♠♦s ♦ ♠♦és ♣s♥ ♣♥r

t♠♣rtr ② s r③ s♦r ♦ ♦♠♦é♥♦ ♣r r♣r♦r s ♣r♦♣s ♦①st♥ s ss

íq♦♣♦r

♣♦t♥ ♣rs t♦ sí ♦t♥♦ s t③ó ♣r srr ♦ t♥t♦ ♥ ♦♥♦♥s ♦♠♦é♥s

♦♠♦ ♥♦♠♦é♥s

r♦ ♥♦♥ ♥ ♣rá♠tr♦ ♦♥ tér♠♥♦ s q s st ♥ s♠t♥♦ ♦s rst♥ts

♣rá♠tr♦s ♣♦t♥ ❲ stó♥ st ♦♥t st r♦♥ ♣r ♥♦s ♦s ♦♥

♣rs♥ t♦s á♥t♦s ♦♠♦ s♦ ó♥ ② ♥ ♠♥♦r r♦ ♣r ró♥ Pr♦ t♠é♥ s t③ó♥

♣♦rí strs ♣♥♦ só♥ ♦♥ó♥ q ♣rs♥t♥ ♦s ♦s ♥♦ s t♠♣rtr

s r ♣♥t♦ rít♦ ♦♥ s t♦♥s ♥ ♥s r♥ ② ♦♥ s r♥ rs ♦trs

♣r♦♣s

♣r♦♣st♦ ♦♥♦ r♥♦ q ♣ró♥ ♣r t♥só♥ s♣r ♥trs ♦♥tt♦

♥tr s íq ♦♠♦é♥ ② ♣♦r ♦♠♦é♥ ♥ ♦①st♥ tr♠♦♥á♠ ♥ t♠♣rtr s

♦rrt ♥óts q ♥trs íq♦♣♦r s ♥♦♠♦é♥ str ♣r♦♣st ♣r♠t ♦t♥r rst♦s ♥

t♦♦ r♥♦ t♠♣rtrs ♥tr Tt ② Tc ♦ st ♠♥r ♠♦s rst♦ ♥♦♥♥♥t q ♣rs♥t

♣r♦♣st ♥♦tt♦ ② ♦♦r♦rs ❬ ❪ q ♦r♥ r♥s q ♥♦ ♣r♠t♥ ♦t♥r s♦♦♥s

♥♠ér♠♥t sts ♣r t♠♣rtrs r♥s Tt

♥ s♦ ♦s s♦r♦s s♦r ♣rs ♣♥s ♦♥ ♦ r♥♦ ♣r s rt♠♥t ♥♦♠♦é♥♦

Page 153: Adsorción de fluidos sobre sustratos sólidos, estudiada

s r♣r♦r♦♥ ♦rrt♠♥t ♣rs ♥s tr♠♥♦s t♥t♦ ♠♥t s♠♦♥s ♦♥t r♦

❬ ❪ ♦♠♦ ♣♦r ♠♦ t♦rís ♥♦ ♦s ♥ ♦♥t①t♦ ♣r t♠♣rtrs s Tt

♥③r♦♥ t♠é♥ ♣r♦♣s ♠♦♦ s♣rs ② st♦♥s rr♥ts tr♥só♥ ♠♦♦ sts

♣r♦♣s r♦♥ ①trís ♥áss strtr s s♦tr♠s s♦ró♥ ♥ st s♦ ♥♦s ♦s

rst♦s ♠ás r♥ts q ♠♦s ♦t♥♦ r♦♥

Pr sst♠ r2 s ♣♦ ♥r s♦tr♠s ② strtr s ♠ás ♣s q s r♣♦rts ♥ ♥♦s

tr♦s ❬❪

Pr sst♠ r ♦♥ ♥♦ ①st♥ ♣rát♠♥t r♣♦rts s♦r st♦s ♠♦♦ st sst♠ t

③♥♦ ♥♦♥tr♠♦s q ①st ♠♦♦ r♥ ♦ q sñ♥ ♥♦s rst♦s ♦s ♠♥t

s♠♦♥s ♥♠érs

♥ sst♠ r s ♦sr ♣ró♥ ♥ strtr s♠♦♥♦♣s st ♦♠♣♦rt♠♥t♦ s

s♠r r♣♦rt♦ ♥ trtr ❬❪

♥♦♥tr♠♦s ♦rs ♠♦♦ ② ♣r♠♦♦ ♣r sst♠s ♦♠♦ ❳ ❳ ❳

♦♠♣♠♥tr♦ ♦s tr♦s ♦♠♦ s rr♥s ❬❪ ②❬❪ ♥♦s♦tr♦s ♠♦s ♦r♦ r♣r♦r ♣r

sst♠s rs ♦♠♦ ♦s ♦♥stt♦s ♣♦r ❳♥ó♥ s♦r♦ s♦r rs♦s sstrt♦s s strtrs í♥s

♣r♠♦♦ ♠út♣s s♦r s q s t♦r③ ♥ st♦s tr♦s

♥ t♦♦s ♦s s♦s s ♦♣ró ♥tr♦ ♥s♠ ♥ó♥♦ s r ♦♥ ♥ sst♠ ♦♥ s ♠♥t♥í ♦♥st♥t

♥ú♠r♦ ♣rtís ♦ ♠ás t♠♣rtr ② ♦♠♥ ♥q ♥♦s rst♦s r♦♥

r♦t♥♦s tr♥♦ ♥tr♦ ♥s♠ r♥ ♥ó♥♦ ♠ás r♣rs♥tt♦ ♦ q ♦♥stt② ♥ sst♠

r

♥③r♦♥ ♥s ♣r♦♣s st♦s ♦s s♦r♦s ♥ r♥rs ♦♥♦r♠s ♣♦r ♣rs é♥ts s

♣t♦ ♣r s♦r♦ s ♥♦♥trr♦♥ t♥t♦ ♣rs q r♥ s♠trí ♣♦t♥ ①tr♥♦ ♣♦ sí

♦♠♦ ♣rs q r♦♠♣♥ st s♠trí sts st♦♥s stá♥ ♥ ♣rt♦ ♦r ♦♥ s r♣♦rts ♥ trtr

s ❬ ❪

♥ts rst♦s r♦♥♦s ♦♥ r♣tr s♠trí ♣r ♥s ♦t♥♦s ♥ ♦♥t①t♦

♥ s♦ r♣♦rt♦s ♣♦r r♠ ② ♥st♥ ❬❪ s♣t♦ st♦ ♥♦s♦tr♦s ♠♦s ♣♦♦ r♣r♦r ♣♦r

♠♦ ♥str♦ ♥♦♥ s♦s rst♦s ② ♠ás st♠♦s ♥ ♦rró♥ ♥tr ♥s t♠♣rtr ②

r♣tr s♠trí ♠♦s ♦ q r♣tr s♠trí ♥ ♣r q♥ ♦♥stt② st♦ ♥♠♥t

s ♣r♦ ♣r rt♦ r♥♦ ♥ss st r♥♦ ♦♥stt② ♥ ♦♥♥t♦ ♦♥t♥♦ ♦♥ s s♦♦♥s s♦♥

sts ♦ ♠tsts s ③ st r♥♦ ♣♥ t♠♣rtr t ♠♥r q ♠ q st

♠♥t r♥♦ ♥ss ♣r st♦ ♠ás ♥rí s s♠étr♦ s t♦r♥ ♠ás str♦

P♦r ♦tr♦ ♦ ♦♥tr♠♦s r ♣♦s ró♥ ①st♥t ♥tr ♥ó♠♥♦ r♣tr ② s ♣r♦♣s

♠♦♦ s♦r ♥ ♣r ♠♦s ♥♦♥tr♦ q ♠á①♠ t♠♣rtr ♣r ♥ ①st♥ s♦♦♥s

s♠étrs ♥tr♦ r♥r ♦♥♦r♠ ♣♦r ♦s ♣rs é♥ts s ①t♥ ♣♦r ♥♠ ♦rrs♣♦♥♥t

t♠♣rtr ♠♦♦ ♥ s ♣rs ♣r♦ ♥♦ ♠s á t♠♣rtr rt ♣r♠♦♦ q

♦rrs♣♦♥ s ♣r s r t♠♣rtr r♣tr s♠trí q ♠♦s ♥♦ ♦♠♦ q ♣♦r

Page 154: Adsorción de fluidos sobre sustratos sólidos, estudiada

♥♠ ♥♦ ①st♥ s♦♦♥s s♠étrs ♣r ♥♥ú♥ r♥♦ ♥ss ♦♥ ♦♥ t♠♣rtr

rít ♣r♠♦♦ sté♥♦s st ♠♥r ♥ ró♥ ♥tr ♦s ♥ó♠♥♦s q ♥ ♣r♥♣♦ ♥♦ ♣r♥

r♦♥♦s

P♦r t♠♦ s str♦♥ r♥rs rts r sst♠s ♥ ♦♥tt♦ ♦♥ ♥ rsr♦r♦ ♣rtís s

Pr ♦ s tr♦ ♥ ♥s♠ r♥ ♥ó♥♦

♥ st s♦ s s♦♦♥s q s ♦t♥♥ s♦♥ qs q s♦♥ sts ♦ ♠tsts Pr sts r♥rs t♠é♥

s ♦tr♦♥ s♦♦♥s s♦s st♦s ♥♠♥ts q r♦♠♣♥ s♠trí ♣♦t♥ ①tr♥♦ ♣r♦

r♥ r♥r rr s♦♦ ♥ s♦ó♥ s♠étr ♣♦s ♦r ♣♦t♥ qí♠♦ ♦①st♥

❱ r ♥ st t♠♦ s♦ ♠ás ♦s ♦s st♦s s♠étr♦s sts q ♦①st♥ s♦♦s ♥ ú♥♦

♦r ♣♦t♥ qí♠♦ ♣r ♥ trr st♦ s♠étr♦ t♠é♥ st q ♣♦s ♠s♠♦ ♦r

♣♦t♥ qí♠♦ ② q ♦ ♣ ♣♥srs q ♦①st ♦♥ ♦s ♦s s♠étr♦s st ♦ ♥♦ r♣♦rt♦ st

♠♦♠♥t♦ ♥ ♥♥ú♥ ♦tr♦ tr♦ s♦r t♠

s ♥st♦♥s r③s ♥ ♠r♦ ♣rs♥t ss r♦♥ ♦r♥ ♦s s♥ts rtí♦s

♥st② ♣r♦s ♦ r s♦r ♥ sts ♦ 2 ♣♦♥t♥♦s s②♠♠tr② r♥

③②s③ ♥ rtr

♦r♥ ♦ ♠ P②ss

s♦r♣t♦♥ ♦ ♦♥ srs st t ♥st② ♥t♦♥ t♦r②

rtr ③②s③ ♥ ❯rrt

P②s

♦rrt♦♥ t♥ s②♠♠tr ♣r♦s ♥ sts ♥ st♥r ♣rtt♥ ♥s

rtr ♥ ③②s③

P♣rs ♥ P②ss

s♦r♣t♦♥ ♦ r ♦♥ ♣♥r srs st t ♥st② ♥t♦♥ t♦r②

rtr ♥ ③②s③

P②s

♣♦♥t♥♦s ②♠♠tr② r♥ ♥ rst♦rr ♣s tr♥st♦♥s ♦ s♦r s

rtr ③②s③ ♥ ❯rrt

♥tr♥t♦♥ ♦r♥ ♦ rt♦♥ ♥ ♦s

♦♥♥♠♥t ♦ r t♥ t♦ ♥t ♣r s♠♥♥t s

rtr ♥ ③②s③

♦r♥ ♦ ♠ P②ss

♦rrs♣♦♥♥ t♥ s②♠♠tr ♥ ♦ sts ♥ rst♦rr ♣s tr♥st♦♥ ♥s

③②s③ ♥ rtr

P ♥s

s♦r♣t♦♥ ♦ s ♦♥ s♦ srs r♦t t♦r r② ♥s ②rs

rtr ♥ ③②s③

Page 155: Adsorción de fluidos sobre sustratos sólidos, estudiada

P②s rt ♥ ♣rss ♦♣②s

♥ ♦ ♣♥r sts ♦ ♠ts t ♦rrs♣♦♥♥ ♦ ♣rtt♥ ♥s ♥ t

♣♣r♥ ♦ s②♠♠tr ♣r♦s

rtr ♥ ③②s③

P②s s♦♠t♦ rrt♦

Page 156: Adsorción de fluidos sobre sustratos sólidos, estudiada

♦rí

❬❪ ♥ ♥ ♥ ♥ ♥ ❱♦ss♥ P②s tt

❬❪ ♥ ♥ ♥ ♥ ❱♦ss♥ ♥ r tt P②s

❬❪ r♠ ♥ ♥st♥ ♠ P②s

❬❪ ③②s③ ♥ rtr ♠ P②s

❬❪ ♥♦tt♦ ♥ ♦♦ P②s

❬❪ ♥♦tt♦ rtr♦♦ ♦♦ ♥ ❲ ♦ P②s tt

❬❪ ③♠s② ❲ ♦ ♥ ❩r♠ ♦ ♠♣ P②s

❬❪ str ♥♦tt♦ rs ♥ ♦♦ P②s tt

❬❪ rtr ③②s③ ♥ ❯rrt P②s

❬❪ rtr ♥ ③②s③ P♣rs ♥ P②ss

❬❪ rtr ♥ ③②s③ P②s

❬❪ rtr ③②s③ ♥ ❯rrt ♥tr ♥ ♦s

❬❪ rtr ♥ ③②s③ P②s ♦♣②s

❬❪ ③②s③ ♥ rtr P ♥s

❬❪ rtr ♥ ③②s③ ♠ P②s

❬❪ rtr ♥ ③②s③ P②s s♦♠t♦ rrt♦

❬❪ r♥ ♦ P②s

❬❪ r♠s♦♥ P②s

❬❪ ♥ ❲s ❩ P②s ♠

❬❪ P ♦♥r ♥ ❲ ♦♥ P②s

❬❪ r♥♥ ♥ tr♥ ♠ P②s

❬❪ P r③♦♥ P②s rrt

❬❪ P r③♦♥ ❯ r♦♥ ♥ ♥s ♦ P②s

Page 157: Adsorción de fluidos sobre sustratos sólidos, estudiada

❬❪ ♦s♥ P②s tt

❬❪ r ♥ ♦s♥r P②s

❬❪ qrs ♥ ♦ P②s

❬❪ Pt♦s s ❨r♥♦ ❩♦ ♥ ♥ rt Pr♦♥s ♦ t t♦♥

♠② ♦ ♥s

❬❪ P ♥♥s r♦r❲②rt ♥ r ♣r② ♥ ❲tt♥ P♥♦♠♥ r♦♣s s

Prs ❲s ♣r♥r❱r ❨♦r

❬❪ ❲ r ❲ ♦ ♥ ❩r♠ P②s s♦r♣t♦♥ ♦rs ♥ P♥♦♠♥ ♦r Ps♥

♥♦ ❨♦r

❬❪ P ♥s♥ ♦♥ ♦r② ♦ s♠♣ qs sr ♦♥♦♥

❬❪ tr♦♣♦s ❲ ♦s♥t ♦s♥t r ♥ r ♠ P②s

❬❪ r ♥ ❲♥rt ♠ P②s

❬❪ Prs ♥ ❨ P②s

❬❪ ♦ P②s

❬❪ ♥s P②s

❬❪ ❲rt♠ P②s tt

❬❪ ❱rt ♥ ❲ss P②s

❬❪ rr ♥ ♥rs♦♥ ♠ P②s

❬❪ ❲s ♥r ♥ ♥rs♥ ♠ P②s

❬❪ rr ttst ♥s r♣r ♥ ♦ ❨♦r

❬❪ r♠♥ P②s

❬❪ Ptr ttst ♥s sr ♠str♠

❬❪ ♥ ttst ♠♥s ❲② ❨♦r

❬❪ P ♥tt tst qs ♦♥♣ts ♥ Pr♥♣s Pr♥t♦♥ ♠ rs②

❬❪ ②r ♠ P②s

❬❪ rr P ♦♥r ♥ P♦♠♣ ♠ P②s

❬❪ ♥ ❲ ♦♦r ♠ P②s

❬❪ P r③♦♥ ♥ ♥s ♦ P②s

❬❪ P r③♦♥ ♦ P②s

❬❪ ♥s ♥ ♥♠♥ts ♦ ♥♦♠♦♥♦s s ♥rs♦♥ r ❨♦r

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❬❪ ♦r♦♠ ♦♥s♦♥ ♥ rsr st P②s

❬❪ P r③♦♥ ♥ ♥s ♦ P②s

❬❪ ❲ rt♥ ♥ ❲ sr♦t P②s

❬❪ ♥t♦♥ ♥ ❲ sr♦t P②s

❬❪ ts♦ ♥ s P②s

❬❪ ❨ ♦s♥ ♠ P②s

❬❪ ss rs ♥ ♦t③ ♠ P②s

❬❪ ♦t③ ♥ ♦♥s♦♥ ♠ P②s

❬❪ ❨ ♦s♥ ♠t ö♥ ♥ P r③♦♥ P②s

❬❪ P r③♦♥ ♥ ❨ ♦s♥ P②s

❬❪ Prs tt P②s

❬❪ P r③♦♥ P②s tt

❬❪ P r③♦♥ P②s

❬❪ P ♦t ❱s♥②♦ ♥ ❱ ♠r P②s

❬❪ rr ♥ ♥rs♦♥ ♦ P②s

❬❪ ♦♥s♦♥ ❩ö ♥ ♥s ♦ P②s

❬❪ ♥s ♥ ♠ ♦ P②s

❬❪ r♥♦ ♠♦ ♥ P r③♦♥ P②s

❬❪ r♥♥ ♥ tr♥ P②s

❬❪ ♥s ♥ P r③♦♥ P②s

❬❪ ❱ ♥♦ ❱ssr♠♥ ❱ ♦st♣ ♥ ❱sr r♠♦♣②s Pr♦♣rts ♦ ♦♥

r♦♥ r②♣t♦♥ ♥ ❳♥♦♥ ♠s♣r ❲s♥t♦♥

❬❪ r ♥ ♦s♥r P②s

❬❪ t rs ❲ ♦ ♥ P②s

❬❪ rtr♦♦ ❲ ♦ ♥ P②s

❬❪ ♥♠ ♠ P②s

❬❪ ❲ ♠♠♦♥ ♥♥ ♥ r♥ ♥ ♠str② ❲♦♦ t♥r r♥

ts ♠r ② P ♥str♦♠ ❲ r t♦♥ ♥sttt ♦ t♥rs ♥ ♥♦♦②

trsr tt♣♦♦♥st♦

❬❪ ❲ ♥ ❨♥ ♠ P②s

❬❪ ♠t P r♥r ♥ Prr ♠ P②s

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❬❪ ❲♦♠ ♠ P②s

❬❪ ❩♦ ♥s ♥ ♥ P②s tt

❬❪ t② ♥ ❯ ♥r P②s tt

❬❪ ♦t ♥ t P②s

❬❪ r♦②♠ ♥ ①♥r ♠ P②s

❬❪ ❱r s ♥ ss ♦ P②s

❬❪ ♥ ♥ t ♠ P②s

❬❪ ♥s P r③♦♥ ♥ ❯ r♦♥ ♦ P②s

❬❪ ♥ sq ♥ ❲s ♠ P②s

❬❪ ♦♦♦s ♥ sr ♦ P②s

❬❪ ❲t ♦♥③á③ ♦♠á♥ ♥ ❱s♦ P②s tt

❬❪ ♦♦ ♠ ♣♣ ❱

❬❪ ♥r ❲ ♠ P②s tt

❬❪ ❲ ♠ ♥ ♥r P②s

❬❪ ♥ ❲ ♦ ❲ ♠ ♥ r♥r P②s

❬❪ ❩r♠ ♥ ❲ ♦♥ P②s

❬❪ ❲ t ♥trt♦♥ ♦ ss t s♦ ss Pr♠♦♥ ①♦r

❬❪ ♦♥ t♥ rtr♦♦ ❲ t ♥ ❲ ♦ P②s

❬❪ ❲ ♥ ♠ P②s

❬❪ P ♥♥s ♦ P②s

❬❪ P♥t ♥ ❲♦rts P②s

❬❪ ♥ ❲ ♦ ♣♦♥t♦ ❲ ♠ ♥ r♥r ♦ P②s

❬❪ P r③♦♥ ♥ ♥s ♦ P②s

❬❪ P♥t ♥ sr P②s tt

❬❪ ③②s③ P②s

❬❪ ♥ str ❲ ♥ ❲ ♦ rrr♦ ❲ ♠ ♥ ♦♦ P②s

tt

❬❪ str ♥ ❲ ♥ ♦ ♠♣ P②s

❬❪ ♦ss P ♦r ♥ t P②s

❬❪ ss t♥ ♥ ❲ ♥ P②s tt

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❬❪ r♠ s ♥ ③♥♥ P②s tt

❬❪ t♠ t ♥ P ♦r P②s tt

❬❪ P ♠r r♥ r ♥ ♥ ♥ P②s

❬❪ ♥rs♦♥ P r③♦♥ ♥ ♦ ♥ ❱s♦ ♠ P②s

❬❪ ❱ ♥♦② ♥ ❲ ♠ P②s tt

❬❪ rtr♦♦ t♥ ♦♥ ❲ ♦ ♥ ❲ t P②s

❬❪ P rs ③③♥ sñs tr ♦rst ♥ ♠s♦♥ ♠

P②s

❬❪ ❩♥ ♥ ❩♦♥ P②s

❬❪ ❲s♦♥ P②s

❬❪ ❲t ♥ ❩♥ ♠ P②s

❬❪ ❲t ❱ ♥ trss ♥ ♠ P②s

❬❪ ③②s③ ♥ st P②s

❬❪ ♠♥ts r♦ts ♥ tr P②s tt

❬❪ ③②s③ P②s

❬❪ ❱ ♠r P ♦t ♥ ❱s♥②♦ P②s

❬❪ ❲ s♦ ♥♦t ♠♣ ♠♥ts ♥ r♦ts P②s

❬❪ s♦♥ ♥ P ♦♥s♦♥ ♦ ♠♣ P②s

❬❪ r ss ♥s ❯♥rstt

❬❪ r ♥ r♥ ♥ ♣ Pr♣♦s ♦♠♣trs r ♠ ♦♥♦♥

❬❪ P ♠r r♥ r ♥ ♥ ♥ P②s

❬❪ P ♠r r♥ r ♥ ♥ ♥ P②s

❬❪ ❱s♦ ♥ P r③♦♥ ♠ P②s

❬❪ r ♥ ö♥ P②s

❬❪ ❲ ②s♦ Ptr② ♥ ♦♦♦s P②s

❬❪ s♦♥ ♥ rts ♠ P②s

❬❪ ♦ ♥s ♥ ❲♥ ♠ P②s

❬❪ r♦s ís íq♦s ♥sttt♦ ♥s trs r ♦♥s♦ ♣r♦r ♥st

♦♥s ♥tís