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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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