Nano technology slide presentation.

1. Presented By:-
Saumya Ranjan Behura
NANOTECHNOLOGYNANOTECHNOLOGY
A technique for futuristic innovationsA technique for futuristic innovations

2. BASICS OFBASICS OF
NANOSTRUCTURESNANOSTRUCTURES
- At nanoscale, the physical, chemical &
biological properties of the materials differ in
fundamental & valuable ways from the
properties of individual atoms i.e., synthesis
of nanomaterials is one of the most active
fields in nanotechnology .
- The new methodologies that have been
developed to quantify the Properties of
individual nanostructures are:
Top Down Approach ( Photolithography )

3. The term Nano was coined by Eric Drexler in
1986.
The two early versions of scanning probes i.e,
AFM and STM launched this.

4. Field of applied science focused on design,
synthesis and application of materials on NANO
scale.
The goal is to manipulate atoms individually and
place them in a pattern to produce desired
structures.
Materials reduced to nanoscale can suddenly
show very different properties compared to their
macroscopic counterparts enabling unique
applications.

5. Some nanoparticles self assemble while others use
scanning probe microscopy.
Two main approaches for building nanoparticles
are:
(1) bottom-up approach where materials and
devices are build atom by atom.
(2) top-down approach where they are synthesized
by removing existing materials from larger entities.

6. Smart clothing: Finest textile fibres with sensors,
computers and motors embedded.
Smart furniture: Fitted with micro-chips that change
depending on body posture.
Cool cosmetics: Made of colloidal nanoparticles with
excellent absorbent qualities.
Purifying the elixir: Removal of micro to nanoscale
contaminants from water, including pathogens.
Famines almost eradicated: Replicate anything you want,
even food!!

7. APPLICATIONS OFAPPLICATIONS OF
NANOTECHNOLOGY.NANOTECHNOLOGY.
Nanotechnology has the potential to completely revolutionize the
electronics industry. this technology may one day create circuits
which would allow manufacturing of nanochips on a nano-scale
to grow a variety of electrical & electronics components, for eg:
 Nanophotonics
 Nanopolymers
 Nanobatteries
 Nanomotors
 Nanogenerators
 Nanobots,….
and many more…….

8. NANOMOTORSNANOMOTORS
 A nanometer is a molecular device capable of
converting energy into movement & forces on
the order of piconewton.
 By attaching a gold plate to the outer shell of a
suspended multiwall CNTs,they are able to
electrostatistically rotate the outer shell
relative to the inner core.
 The thin vertical string seen in the middle is
the nanotube to which the rotor is
attatched.when the other tube is sheared the
rotor is able to spin freely on the nanotube
bearing.
 After depositing multiwalled nanotubes ,rotors
are attached to the nanotubes using electron

9. Stator electrodes are placed on either
side of each rotor to provide a mechanism
to drive the rotor.
Nanometer can be driven with either DC
or AC signals & the rotor can be
positioned at any angle ,& can be used in
optical ckts.
It consists of a nanoscale
electromechanical actuator that
incorporates a rotable metal plate.
Because of the atomic perfection of C
bonds the tube has exceptionally low

11. NANOGENERATORSNANOGENERATORS
 Researchers have developed a
new technique for powering
nanoscale devices without the
need for bulky energy sources
such as batteries.
 By converting mechanical energy
from body movements, muscle
stretching or water flow in to
electricity, these nanogenerators
could make it possible for a new
class of self powered implantable

12. Nanogenerators produce current by
bending & then releasing zinc-oxide
nanowires which are both
piezoelectric & semiconducting.
They use very small piezoelectric
discharges when such nanowires are
bent & then released.
By using such an integrated array,
they can produce enough current to
power nanoscale devices.

13. PROTOTYPE NANOGENERATOR

14. 14
 These are another member of the
fullerene family.
 Here the graphene sheet is rolled up into a
seamless cylinder with diameter of the
order of a nanometer.
 They exhibit
 extraordinary strength,
 unique electrical properties,
 efficient heat conductivity.

15. 15
 The joining of two carbon nanotubes with
different electrical properties to form a diode

16. -Computers billions of times faster with memory
on a molecule and information transfer at speed
of thought.
-Fast chemical analyses using minute quantities
of materials.
-New approaches for medical diagnosis,
treatment, and drug delivery.
- New catalysts for cleaner,
more efficient chemical
and energy industries.
The promise ofThe promise of
nanotechnologynanotechnology

17. -New materials 100 times as strong as
current materials.
- Nano-meter scale can take 100% of
bacteria out of water.
- New technologies for energy
production and conversion
(fuel cells, solid-state lighting,
photovoltaic's)
Molecular food syntheses (end to
starvation ??)
Nano robots.

18. ADVANTAGES
 Making of cpu’s that will be billion times
faster.
 Spacecrafts that can be 1000 times
stronger, faster and lighter.
 No more pollution and automatic cleanup
of already existing pollution.
 Access to a superior education for every
child on Earth .
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19. DISADVATAGES
 Atomic Bomb Grenades (Powerful Atomic
Bombs that could blow up cities in a
single grenade).
 Corruption of world Networks built on NT
Technology.
 Nuclear destruction objects that could
destroy the earth.
 Robotic Killers that were designed to kill
humans. 19

20. Increased mobility and
reactivity of
nanoparticles may be
risky.
Untraceable weapons
of mass destruction
and enhanced
surveillance.
Can adversely affect
regulatory reactions of
the body.
Nanomachines can
prevent ozone layer
thinning, deforestation
and mining.
Using the same
weapons for national
security.
Also makes life-saving
drugs and treats
incurable diseases.

21. CONCLUSIONCONCLUSION
- Given the potential impact on society, and
the growing public debate over
nanotechnology’s benefits and risks, both
science and non-science majors alike
should have at least a passing
understanding of what this nanotechnology
is.
- This young field can also serve as an
illustrative example of how society
grapples with any emergent technology,
including those yet to come…….

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