Nano means the things which are in extremely small measure. The
size of the particles which are lesser than 100 nanometers are
rightly called as Nanoparticles. It origins is from the Greek word
nanos means dwarf
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Formulated and systematic knowledge of nano is known as nano
science
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It is the study and designing of machines on the molecular and
atomic level. The mathematical measure of nanometer is 10 -9 m.
Symbol of nano is n. ( 1n=1billonth of 1 m )
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Relating Nanoscience, Nanoengineering and Nanotechnology
NANOSCIENCE Provides the Basic Knowledge for both Nanotechnology
and Engineering NANOSCIENCE Provides the Basic Knowledge for both
Nanotechnology and Engineering
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Main discoveries of Nanoscience C60 molecule which is also
called as Bucky ball. Some Uses :In diagnostics and Cancer cell
treatments Carbon nanotubules 100times Stronger than the steel but
1/6 of heavy, used in polymers as good conductors of heat &
Electricity. Nanowires Extremely small threads about 50nm wide.
Some Uses : Biosensors, Elec. equipments, Memory chips etc,
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German scientists have created a Nano particle containing
polymer that both repels and kills bacteria. Japanese scientists
have used nano needles 100 nm wide to deliver materials to very
specific points in the cell. Nano-flowers produced by growth of
silicon carbide nanowires on gallium catalyst particles.
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To increase the recording densities of hard disk drives,
patterned media has become one of the most promising strategies for
achieving recording densities beyond 1 Tbit/in 2. The researchers
are trying to design HD with morethan 3.3 Tbit/in 2.
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Researchers have unveiled a semiconductor nano crystal coating
material capable of controlling heat from the sun while remaining
transparent. This heat passes through the film without affecting
its visible transmittance, which could add a critical energy-saving
dimension to smart window coatings.
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Today many companies are developing nanotechnology with any
experts. Some of the projects and companies are : Works on Self
assembled nano Structures Works on development of
Nano-Photonics
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Integrated circuits with nano-sized features Developing quantum
dot based displays Magneto resistive Random Access Memory
(MRAM)
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Nano-titanium dioxide and zinc oxide can absorb and reflect UV
light, transparent to visible light and also used in
sunscreens
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Intel core i7 in the processor which is the latest release
Intel. Core i7 chip consists of more than about 700 millions of
transistors in it. Its construction is based on 45nm fabrication
process
Slide 14
Due to the development in nano coating technology ultra
thin-easy clean nano-coatings are produced. Its is based on the
nano coating of silicon- dioxide
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Today Nanoscience revolutionized our world. By using
Nanoscience and technology Water purifiers, Solar saving systems,
Water repellent systems, New therapy methods, Internal combustion
methods in transports, Memory chips, Nano cables in communication
technology, construction of Nano robots.
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Only one Drawbacks in Nano Nanotechnologies could increase the
divide between rich and poor. The application of Nanoscience is
growing fast but the availability of that products are little
higher so, it may form distance between the Rich and Poor There are
various Studies emerged today to develop Nanotechnology with
adequate methods Nano engineering Nano science Nano Technology
Appied nanotechnology
