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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