application of nanotechnology-bps 16 jan1

8/3/2019 Application of Nanotechnology-BPS 16 Jan1

http://slidepdf.com/reader/full/application-of-nanotechnology-bps-16-jan1 1/22

CONSULTING ENGINEERS LIMITED

Nanotechnology

andIts Applications

Dr. Narendra Kumar Agnihotra

TCE QSTP-LLC, Doha, Qatar




Chairs, Desk, pen,

video game, TV,and you too

are formed by atoms.

You do remember that everything is made of atoms.

Creation of World




µNano¶ comes from the Greek word ³Dwarf´

What is Nano?

³1 meter ́ equal to 100 centimeter (cm)³1 meter ́ equal to 1000 milimeter (mm)

Similarly

³1 meter ́ equal to 1000000000 (109 ) nanometer (nm)

~ dimension of one billionth

One human hair hair is around 100 thousand times bigger.




The radius of one atom of goldgold is 0.14 nm.

Dimension of a small molecule like methanemethane (CH4) ~ 0.5nm

Virus are typically 75 times bigger than a nm.




Nanometer Scale

More Size Comparisons

An atom's nucleus is much smaller ~ 0.00001 nm




How Big is a Nanometer ?

10 centimeter 1 centimeter 1 millimeter 100 micrometer

10 nanometer 100 nanometer 1 micrometer 10 micrometer

1 Nanometer




Dr. Richard Feynman

"There's Plenty of Room at the Bottom."

Nanotechnology dealing with anything

measuring between 1 and 100 nm.

What is Nanotechnology?

Physical

Chemical

Electrical Mechanical

Optical

Magnetic

Creation of materials/devices/systems

through control/manipulation of matter

on the nanometer scale and exploitationof novel phenomena/properties which

arise because of the nanometer length

scale.




Gold Particle at Nano Scale

Well« strange things happen at the small scale ± If you keep cutting

until the gold pieces are in the nanoscale range, they don¶t look gold

anymore« They look RED!




Smaller Size of

Gold Particle

Gold Particle at Nano Scale

In fact, depending on size, they can turn red, blue, yellow, and

other colors

Different thicknesses of materials reflect and absorb light differently




Surface to Volume Ratio( S/V)

For example, 5 cubic centimetersFor example, 5 cubic centimeters ²²

about 1.7 cm per sideabout 1.7 cm per side ²² of materialof material

divided 24 times will produce 1divided 24 times will produce 1

nanometer cubes and spread in a singlenanometer cubes and spread in a single

layer could cover a football fieldlayer could cover a football field

Surface Area = 6 L2,

Volume = L3

S/V = 6/L

Surface Area = 6 (L/2)2,

Volume = (L/2)3

S/V = 2*6/L

Surface Area = 6(L/4)2,

Volume = (L/4)3

S/V = 4*6/L

Surface Area = 6(L/16)2,

Volume = (L/16)3

S/V = 16*6/L

Reduce the size of material

Length of side L/2

Length of side L/4

Length of

side L/16

Length of side L




Carbon Nanotubes(CNTs)

CNTs are a tubular form of carbon with diameter as small as 1 nm.

Extraordinary properties:

Electrical conductivity higher

than copper.

Very high current carrying

capacity (107 - 109 A/cm2)

Young¶s modulus over 1 T Pa

As stiff as diamond,

Tensile strength ~ 200 GPa.




Application of Nanotechnology




Renewable Energy




Nano Product: Natural

Nature takes brittle materials , but form them together to be

very strong and beautiful products.




Nano Product

Electronics & Communication

Industry

Wilson Nano Tennis Racquet

- Made With Nanotechnology

Sports Industry




Application of various personal care and cosmetics products, such

as sunscreens, anti-aging creams, toothpastes, hair care andperfumes.

Nano Product: Cosmetic Industry




Nanotechnology will makes air travel safer, faster and cheaper.

Anti fog Glasses for Air Planes Strong Plastic, metals and composites for engines, Bullet Proof

Jackets.

Clean fuel for environment

Lighter metals and composites for

the structure to carry in war area.

Defense, War Artifact & Air Travel




Tex til es that change propertiesas a f unction of needs,

such as keeping you cool in summer

and warm in winter.

F orks, spoons, dishes, pots, clot hes,

Dirty or wet - just like a lotus leaf when you pour a drop of water

on it;

Eventually, you will not

hear mum saying that

you got your

T-shirt dirty!




Drug delivery

- Targeted delivery, controlled release (either timed or in response to

an external signal)

BioSenser

- Incorporating sensors would allow release of drugs.

Nano robot for Brain surgery

- f or brain surgery.

Cancer Therapy

Nano robot

Cancer Cells

Biomedical & Medical Application




Thank You

application of nanotechnology-bps 16 jan1

Documents