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CARBON NANOTUBES

SUBMITTED BY

Rahul Yadav1212422

2012-2016

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CONTENT

   Introduction  What are Carbon Nano tubes ?   History  Applications  Uses   Structure  Synthetic Methods  Advantages

  Disadvantages  Conclusion  Reerences

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 INTRODUCTION

  !ver the past several decades there has been an e"plosive gro#th in

research and develop$ent related to nano $aterials%

   A$ong these one $aterial& carbon Nanotubes& has led the #ay in ter$s

o its ascinating structure as #ell as its ability to provide unction'

speciic applications ranging ro$ electronics& to energy and biotechnology Carbon nanotubes (CN)s* can be vie#ed as carbon

#his+ers& #hich are tubules o nano$eter di$ensions #ith properties

close to that o an ideal graphite iber%

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WHAT ARE CARBON NANOTUBES ?

  Carbon nanotubes are ullerene'related structures #hich consist ographene cylinders closed at either end #ith caps containing pentagonalrings%

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 HISTORY

   ,-./ 0% 1% Radush+evich and 1% M% 0u+yanovich

  Cold War hurt i$pact o discovery

  So$e #or+ done beore ,--, but not a 2hot3 topic

• ,--,',--/ )he Watershed

• Ii4i$a discovers MWCN) in arc burned rods Mint$ire& Dunlap& and

White5s predict a$a6ing electronic and physical properties

• ,--7 8ethune and Ii4i$a independently discover SWCN)

•

Add )ransition $etal to Arc Discharge $ethod (sa$e $ethod as 8uc+y8alls*

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APPLICATIONS

  8icycle co$ponents

  Wind turbines

  9lat panel displays

  Scanning probe $icroscopes

  Sensing devices

  Marine paints

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USES

  Spacecrat

  Space elevators

  Solar panels

  Cancer treat$ent

  )ouch screens

  :nergy storage

  !ptics

  Radar 

  8iouel

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 STRUCTURE

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SYNTHETIC METHODS

  Diffusion flame synthesis& #ith a variety o $etal and $etal o"ide

catalysts and support geo$etries

  Electrolysis of graphite in $olten lithiu$ chloride under an inert

at$osphere

  Ball milling and annealing of graphite& cataly6ed by ironconta$ination ro$ the steel $illing balls

  Heat treatment of polyesters or$ed ro$ citric acid and ethylene

glycol& at ;

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ADVANTAGES

  :"tre$ely s$all and light#eight& $a+ing the$ e"cellent replace$ents

or $etallic #ires

  Resources re=uired to produce the$ are plentiul& and $any can be

$ade #ith only a s$all a$ount o $aterial

  Are resistant to te$perature changes& $eaning they unction al$ost 4ustas #ell in e"tre$e cold as they do in e"tre$e heat

  Have been in the R>D phase or a long ti$e no#& $eaning $ost o the

+in+s have been #or+ed out

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DISADVANTAGES

Despite all the research& scientists still dont understande"actly ho# they #or+ 

:"tre$ely s$all& so are diicult to #or+ #ith Currently& the process is relatively e"pensive to produce the

nanotubes At the rate our technology has been beco$ing obsolete& it

$ay be a ga$ble to bet on this technology

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CONCLUSION

  Carbon nanotubes are the ne"t step in $iniaturi6ing electroniccircuits& replacing silicon transistors and diodes& #hich are astreaching the theoretical li$its o si6e and speed o operation%

  Using CN)s& nanochips can be $ade #ith entire circuits on it%Ideal diodes can be $ade ro$ CN)s& resulting in highlyeicient electronic circuits%

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Thanks