Presentation on the topic:

NANO TECHNOLOGY AND NANO MATERIALS

Presented by:

Ashish Chaturvedi

ME , Vth , A

Contents :

Introduction

Nanoscale

History of Nanotechnology

Need

Approaches

Nano Materials

Advantages

Applications

Implications

Conclusion

What is Nanotechnology?

Semiconducting metal junction

formed by two carbon nanotubes

“Nanotechnology is the study and

manipulation of matter at the nanoscale”

Buckyball

What is Nanoscale?

1.27 × 107 m 0.22 m 0.7 × 10-9 m

Fullerenes C60

12,756 Km22 cm 0.7 nm

10 millions times

smaller

1 billion times

smaller

History of Nanotechnology

1959- According to Richard Feynman-

“There is plenty of room at the room at the bottom.”

1974 – “Nanotechnology” - Taniguchi uses the term

nanotechnology for the first time.

1981 – IBM develops Scanning Tunneling Microscope.

This microscope evolved to allow the manipulation of

individual atoms and molecules in the field of Nano

technology

NEED FOR NANOTECHNOLOGY

Allows the placement of small structures placed with precision,simplicity and low cost

Leads to economic growth

Enhances national security

Improves the quality of life

Leads to job creation

Nanoscale Approaches

Nano Materials

Carbon Nanotubes::

CNTs also known as buckytubes are allotropes of carbon with a cylindrical nanostructure. Nanotubes have been constructed with length-to-diameter ratio of up to 132,000,000:1

the strongest and stiffest materials discovered till to date.

• Single-walled nanotubes have a diameter of close to 1 nanometer, with a tube length that can be many millions of times longer.

Single Walled Nanotubes (SWNT)

• Multi-walled nanotubes (MWNT)consist of multiple rolled layers (concentric tubes) of graphite

Multi Walled Nano Tubes (MWNT)

Buckyballs

• Allotrope of carbon

• Also known as fullerene

• Contains 60 carbon atoms

• Can be compressed upto 70% of it’s original

volume

Advantages

• In Mechanical Engineering

Material becomes stronger,lighter ,cheaper,durableand precise

Manufacturing at almost no cost

Nanobots

• Industrial Application

Computers can become a billion times faster and a million times smaller

Automatic Pollution Cleanup

• Medical Application

End of Illnesses (i.e. cancer, heart disease)

Universal Immunity (i.e. aids, flu)

Body Sculpting (i.e. change your appearance)

• Health and safety issues

Implications of Nanotechnology

Nanoparticles can cause serious illness or damage human body.

Untraceable destructive weapons of mass destruction.

•“Grey-goo”

It is a hypothetical situation where self replicating nanobots go

out of control, and consume all matter on earth.

“The Living Fog” formed by billions of replicating nanobotsgone mad

Thank you…..

Any Queries ????

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