Carbon Nanotube PPT

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CARBON CARBON NANOTUBES NANOTUBES Presented By – Presented By – Amarjit Biswas Amarjit Biswas E.C.E. E.C.E.

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I am grateful to SUVANKAR DAS, he is the brain behind the job with this PPT, I only created the slide thats why my name is there but it is the conceptual brain child of him. He also gave a very good presentation on this topic.

Transcript of Carbon Nanotube PPT

Page 1: Carbon Nanotube PPT

CARBON CARBON NANOTUBESNANOTUBES

Presented By –Presented By –

Amarjit BiswasAmarjit Biswas

E.C.E. E.C.E.

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WORLD OF NANO-TECHNOLOGYWORLD OF NANO-TECHNOLOGY

A A Nano-ParticleNano-Particle defines a defines a small object that small object that behaves behaves as a whole unitas a whole unit in terms in terms of of transport transport andand propertiesproperties..

Nanotechnology is in fact Nanotechnology is in fact a a recasting of recasting of straightforwardstraightforward materials materials science.science.

NanotechnologyNanotechnology, is the study of the controlling of matter , is the study of the controlling of matter on an on an atomic and molecular scaleatomic and molecular scale, dealing with structures of , dealing with structures of the the size 100 nanometerssize 100 nanometers or smaller in at least one dimension. or smaller in at least one dimension.

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CARBON NANO TUBES CARBON NANO TUBES AND ITS ORIGINSAND ITS ORIGINS

Carbon Nanotubes are Carbon Nanotubes are allotropes of carbonallotropes of carbon with with a cylindrical a cylindrical nanostructure.nanostructure.

In the In the 19701970s, a preparation s, a preparation of the planned of the planned carbon carbon filamentsfilaments was completed was completed by by Morinobu EndoMorinobu Endo. .

In 1993 that In 1993 that IijimaIijima and and Donald BethuneDonald Bethune found single walled found single walled nanotubes known as nanotubes known as BuckytubesBuckytubes. which are . which are completely completely hollow moleculeshollow molecules that are crafted from pure carbon and are that are crafted from pure carbon and are bonded together in a pattern of specific bonded together in a pattern of specific hexagon patternshexagon patterns..

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TYPES OF NANOTUBESTYPES OF NANOTUBESSINGLE WALLED

NANO BUDS

MULTI WALLED

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PROPERTIESPROPERTIES Carbon nanotubes are the Carbon nanotubes are the strongeststrongest and and stiffeststiffest materials yet discovered in materials yet discovered in

terms of terms of tensile strengthtensile strength and and elastic moduluselastic modulus respectively. Tensile strength respectively. Tensile strength of of 63 gigapascals (GPa)63 gigapascals (GPa)..

Nanotubes are very good thermal conductors , exhibiting a property known Nanotubes are very good thermal conductors , exhibiting a property known as as Ballistic Conduction.Ballistic Conduction.

The temperature stability of carbon nanotubes is estimated to be up to The temperature stability of carbon nanotubes is estimated to be up to 2800 °C in vacuum2800 °C in vacuum and about and about 750 °C in air750 °C in air. .

Due to Due to nanoscale dimensionsnanoscale dimensions, electrons propagate only along the tube's , electrons propagate only along the tube's axis. Hence, carbon nanotubes are frequently referred to as axis. Hence, carbon nanotubes are frequently referred to as One-One-Dimensional.Dimensional.

MultiwalledMultiwalled carbon nanotubes with interconnected inner shells show carbon nanotubes with interconnected inner shells show SuperconductivitySuperconductivity with a relatively high transition temperature Tc = 12 K. with a relatively high transition temperature Tc = 12 K.

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SYNTHESIS OF CARBON NANOTUBESYNTHESIS OF CARBON NANOTUBE Carbon Nanotubes were observed during Carbon Nanotubes were observed during “ARC-DISCHARGE”“ARC-DISCHARGE” by by

using a current of using a current of 100 amps.100 amps.

Graphite block is Vaporized by high intensity Laser Pulse in the presence of Inert Gases. CNTs form on cooler surface.

CNTs are formed on METAL CATALYST (Ni, Fe, Co) in presence

of Ammonia, Nitrogen, Hydrogen with Acetylene, Ethylene, Ethanol or Methane at 700 degree Celcius.

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APPLICATION IN ELECTRONICS & APPLICATION IN ELECTRONICS & ELECTRICAL DEVICEELECTRICAL DEVICE

The joining of two carbon The joining of two carbon Nanotubes with different Nanotubes with different

electrical properties to form a electrical properties to form a diodediode has been proposed. has been proposed.

CNT based Transistors work at room temperature and are capable of fast digital switching using a Single Electron.

CNT based Ultra-Capacitors have high energy density, Capacitances up to 5000 Farads can be achieved.

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APPLICATON OF CNT IN OTHER APPLICATON OF CNT IN OTHER FIELDSFIELDS

CNT membranes support fluid flows at several magnitudes greater than proposed in Classical Fluid Dynamics.

World’s Smallest motor. The “NANO MOTOR”

CNT sponge can filter any toxic sludge from water . As CNT sponge is Hydrophobic, it absorbs everything but water.

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FUTURE APPLICATIONSFUTURE APPLICATIONS

CNT based BUCKY PAPERS are CNT based BUCKY PAPERS are 250 250 times strongertimes stronger than steel and 10 times than steel and 10 times lighter. Shows promise as lighter. Shows promise as vehicle & vehicle & personnelpersonnel armorarmor and and next-generation next-generation electronics displayelectronics display..

May be used in May be used in Nano-RadioNano-Radio, sound can , sound can be generated not by vibrations but by be generated not by vibrations but by Thermoacoustics PrincipleThermoacoustics Principle..

CNT can be used in SPACE-ELEVATOR as it shows very high tensile strengths.

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THANK YOU THANK YOU …………………………THE ENDTHE END