3 ppt on bio nano gen

8/3/2019 3 ppt on BIO NANO GEN

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WHAT IS NANO TECHNOLOGY.....??

It is a study of a very tiny elements or molecule

It consists of ..

the process of separation,

consolidation and

deformation of materials byone atom..Defined by Norio Taniguchi


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Different stages in

size with

examples......


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Refers to a nanoscaleelectrochemical device like

galvanic cell but drawing powerfrom the living body (human).

Example:

1.Piezo electric nano generator

2.Thermoelectric nanogenerator


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Human body is aSource of power

In the forms

MechanicalEnergy

Vibration energy(In the form of

Glucose)

Hydraulic energy(Circulatory system)

Heat energy

Sources of power for

nanogenarators


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Piezoelectric nanogenerators based on

aligned ZnO nanowires

School of Materials Science and Engg.,,

Georgia Institute of Technology,

Atlanta, USA


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CONSTRUCTION:

On a sapphire

substrate, gold particles

are deposited to act as a

catalyst.

Nano wires are of 30

to 100nm diameter and

1 to 3 microns length

with 300nm spacing


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Bending back and

forth,piezoelectric zincoxide nanowires develop a

voltage .

For each contact position ofatomic force micro

scope voltage variation of 0

to 6.5 mv is observed.

6mm2 size of

nanogenerator produces12mv and 820na output.

Operation:


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Microscopy images of as-grown ZnO nanowires on

sapphire substrate

The schematic of the single-

nanowire generator's

structure


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Based on Seebeck effect.

Thermoelectricity is thephenomenon of converting

heat energy in to

electricity.

Thermoelectric generator:


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Due to temperatureelectron flow is created

between the hot and cold

ends of thermoelectric

elements.

Temperature difference

between skin and air can be

used to generate electricity.

1cm2 size generator cangenerate about 150mw at atemperature difference of

0.90c.

Operation:


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Advantages:

ZnO is bio-compatable material.

ZnO is an environmentally green material.

No need of replacement of batery in bio-implant device every time.

No side effects.

It saves lakhs of amount bcoz no need of the surgery every time.


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APPLICATIONS:

Provides power for an implanted

electronic pacemaker that triggers

heartbeat of patients sufferingfrom tachycardia.

Artificial heart implimentation is

one of the best application.

Implemented in cancer robotics.


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CONCLUSION:

It is the beging stage of Nanotechnology in the

medical field.

And we cannot expect its end, may be its a going on

process.

Human body is the source for huge potential.

it has wast appllications in medical field.


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References

Electronics for you-sep 2009

www.sciencemag.org

www.technologyreview.com

www.sciencedaily.com

www.newscientist.com


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3 ppt on bio nano gen

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