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Nanotechnology

Nanotechnology

Presented By Eng. Ahmad A.Salah

Degree : M.S.C.E

New York Institute Of Technology (NYIT)

May 8

2012

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Agenda

What is nanotechnology ?What can nanotechnology do for us ?What has nanotechnology achieved so far ?What is the future devices and communicationtechnologies ?What are the main challenges facing nanotechnology ?

Carbon Nanotubes (CNTs) Nanotube ApplicationsMolecular Modeling and Simulation in Nanotechnology

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What is Nanotechnology?

Nanotechnology is to build up new large scalematerials by using of very small particles at thelength scale of the nanometer 10 -9.

A Nanometer is a billionth of a Meter, that is,

about 1/80,000 of the diameter of a humanhair, or 10 times the diameter of a hydrogenatom.

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What can nanotechnology do for us?(1/2)

Nanotechnology consists of threeaspects:

Indirect: progressive miniaturization of existingtechnology.Direct: to enhance the performance of existing

processes and materials.Conceptual: all materials and processes areconsidered from a molecular viewpoint.

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What can nanotechnology do for us?(2/2)

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What has nanotechnology achieved sofar ?

The main areas of allocation to date are in :

Electronics: Top down

Photonics: integrated optics and sensors

Cosmetics and finishes for surfaces andtextiles: skin cosmetic formulations

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What is the future devices andcommun-ication technologies ?

Ambient intelligence :

Sensor and sensing everywhereSolution for radioMore speed less energyMore memoryPower and thermal management

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What are the main challengesfacing nanotechnology ? (1\2)

Self-assembly: how to design

Molecular manufacturing:They are of comparable size to the workpieceInterfacial forces make nano-scale objects very

stickyDifficult to store sufficient information

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What are the main challengesfacing nanotechnology ? (2\2)

Nano-particle safety: toxicity.

Public acceptance: genetically modifiedfood

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Carbon Nanotubes (CNTs)(1/2)

Carbon nanotubes are one of the mostcommonly mentioned building blocks ofnanotechnology.

One hundred times the tensile strength of steelThermal conductivity better than all but the purest

diamondElectrical conductivity similar to copper, but withthe ability to carry much higher currents

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Carbon Nanotubes (CNTs)(2/2)

Carbon nanotubes were 'discovered' in 1991by Sumio Iijima .Graphite is made up of layers of carbon atomsarranged in a hexagonal lattice, like chickenwire (see the Figure)

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Nanotube Applications

SuperCapacitors

Field Emission Devices

Carbon Nanotube Sensor Networks(CNSN)

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Molecular Modeling and Simulationin Nanotechnology

Molecular modeling and simulation help infundamental understanding of nano-scalephenomena and as well as in technological

applications.

Molecular simulations provide excellent

opportunities for education and outreach whencombined with visualization tools.

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Questions ?

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