final cnt 0511027

Welcome to the Nano world of Welcome to the Nano world of Carbon Nanotubes Carbon Nanotubes

Presented byPresented by Md. Tazul IslamMd. Tazul Islam Student No:0511027Student No:0511027

Materials Science is based on SCP3Materials Science is based on SCP3

Which stands forWhich stands for

S=StructureS=Structure

C=CharacterizationC=Characterization

P=PropertiesP=Properties

=Processing=Processing

=performance=performance

The Materials ScienceThe Materials Science

TetrahedronTetrahedron

Fields of ApplicationFields of Application

StructuralStructural ElectromagneticElectromagnetic ChemicalChemical MechanicalMechanical Polymer CompositesPolymer Composites

Metallic and semiconducting Metallic and semiconducting nanotubesnanotubes

Carbon Nanotube Carbon Nanotube InterconnectsInterconnects

As a vessel for drug deliveryAs a vessel for drug delivery

StructuralStructural

Combat JacketsCombat Jackets Space ElevatorSpace Elevator ClothesClothes ConcreteConcrete BridgesBridges PolyethylenePolyethylene

The completed cable would be thickest at the geostationary orbit, where the tension was greatest, and would be narrowest at the tips to reduce the amount of weight per unit

area of cross section that any point

The cable must be made of a material with a large tensile strength/density ratio.Carbon nanotubes' theoretical tensile strength has been estimated between 140 and 177 GPa (depending on plane shape), and its observed tensile strength has

been variously measured from 63 to 150 GPa, close to the requirements for space elevator structures

ElectromagneticElectromagnetic

Artificial musclesArtificial muscles BuckypaperBuckypaper SuperconductorsSuperconductors

DisplaysDisplays TransistorsTransistors Conductive filmsConductive films

.

Prototype of NED

Nano Emissive Display

NED is basically a thin, flat cathode ray tube with thousands of electron guns at each pixel. In the past, carbon nanotubes have been pasted or printed onto a surface but the quality of the resulting display has been disappointing. On a back plate, only 3 mm behind each sub-pixel, we place a small structure that contains about one thousand carbon nanotubes arranged such that a properly applied voltage excites each nanotube to bombard the color phosphors with electrons.It will extend the life of large flat panel displays to up to 30,000 hours as well as reduce the price to half (about 400 $) where plasma starts to see “burn in”

aging effects at only 2,000 hours.

Chemical

Hydrogen Storage

Air Pollution Filter

Water Filter

Biotech Container

Carbon nanotubes used by the researchers are sheets of carbon Carbon nanotubes used by the researchers are sheets of carbon

atomsatoms only seven water molecules can fit across their diameteronly seven water molecules can fit across their diameter The super smooth inside of the nanotubes allow liquids and The super smooth inside of the nanotubes allow liquids and

gases to rapidly flow throughgases to rapidly flow through water flow rates is 10,000 times faster than would be predicted water flow rates is 10,000 times faster than would be predicted

by classical equationsby classical equations Salt removal from water, commonly performed through reverse Salt removal from water, commonly performed through reverse

osmosis, uses less permeable membranes, requires large osmosis, uses less permeable membranes, requires large amounts of pressure and is quite expensive.amounts of pressure and is quite expensive.

However, these more permeable nanotube membranes could However, these more permeable nanotube membranes could reduce the energy costs of desalination by up to 75 percent reduce the energy costs of desalination by up to 75 percent compared to conventional membranes used in reverse osmosis.compared to conventional membranes used in reverse osmosis.

Despite tiny size, they can filter water more efficiently than current

MechanicalMechanical

Oscillator Oscillator Nanotube Slick surfaceNanotube Slick surface

membranemembrane

In Semiconducting SectorIn Semiconducting Sector

When CNTs are fabricated a mixture of metallic and semiconducting nanotubes is formed. This carbon nanotube can be used as light emitting semiconductors.

Fig: Arrays of carbon nanotubes in a semiconductor

When excited by a UV laser, titanium dioxide nanoparticles undergo charge separation, where some of the semiconductor’s electrons get trapped—a 3,770 electrons .Electrons trapped in the titanium dioxide displayed a blue coloration

For SWCNTs in the titanium dioxide particles, the blue color decreased. This lack of color meant that some of the electrons trapped in the titanium dioxide were transferred to the SWCNTs.

Complete transfer consisted of 1 electron per 32 atoms of carbon atoms (building blocks of the SWCNTs), and occurred in

just 10 nanoseconds. Such a high electron capacity turned the SWCNTs into

supercapacitors, which can be useful in electronics application

Carbon nanotube interconnects are used in universal memory. The high density CMOS RAM can replace conventional RAMs

and flash memory with even better performance.

Only in sophisticated fields???Only in sophisticated fields???

Answer is NoAnswer is No

In SportsIn Sports

Tour de France winning bikeTour de France winning bike

NanoDynamics golf ball This ball is engineered with nanoparticles to spin less, which should mean less slices and

hooks. The bad news? Lower spin could mean shorter drives. But NanoDynamics is working to put more pop into the balls by hardening

their shell.

AcknowledgementAcknowledgement

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Thanks 2 allThanks 2 allfor being patient &for being patient &

listeninglistening