The document discusses nanotechnology, including its definition as the study of phenomena on the nanoscale, less than 100 nanometers. It describes nanomaterials like fullerenes and nanoparticles. Applications of nanotechnology mentioned include sunscreen, scratch-resistant coatings, microprocessors, and medicine. The future of nanotechnology may include replicating machines, addressing issues like the ozone layer with airborne nanobots, and targeting cancer cells with nano-robots. Risks discussed include toxicity of nanoparticles and potential weapons applications.

2. Contents
1. What is nanotechnology and its origin
2. Nanomaterials
3. Applications of nanotechnology
4. Future of nanotechnology
5. Risks and Ethics

3. Nanotechnology
 Nanotechnology is the study of
physical phenomena on nano scale or
dealing with things measured in
nanometres which is one billionths of a
metre (1 nm = 1 * 10-9 m).
 A nano particle is not visible to the
naked eye and even not visible with a
light microscope.
 Eric Drexler is considered as the
godfather of nanotechnology.
 In 1977, Drexler had the idea of
creating tiny robots that were able to
arrange molecules and produce any
substance in a very small amount of
time.

4. Nanomaterials
Fullerenes – eg: Buckminsterfullerene Nanotubes
Nanoparticles
eg: Silica

5. Applications of
nanotechnology
 Sunscreen
 Self cleaning glass
 Clothing
 Disinfectants
 Scratch-resistant coatings
 Microprocessors
 Transistors
 Nano batteries
 Network cables
 Medicine

6. Future of nanotechnology
 Replicators / Nano machines
- replicate almost anything
 Grey goo scenario
- self replicating nano robots
 Medicine
- nano robots designed to attack
cancer cells
 Environment
- airborne nano robots to rebuild
the thinning ozone layer

7. Risks and Ethics
 Nano particles could become
toxic
 Powerful weapons
 Medical nanotechnology could give us
abilities like rapid healing and night vision
 Economical impact it can bring out with
molecular manufacturing using
replicators.
 Grey go scenario

8. Conclusion
 Nanotechnology can create a world with unimaginable possibilities.
Nanotechnology is predicted to be a main driver of technology and
business in this century and holds the promise of higher
performance materials, intelligent systems and new production
methods with significant impact for all aspects of society.
Topics covered
1. What is nanotechnology and its origin
2. Nanomaterials
3. Applications of nanotechnology
4. Future of nanotechnology
5. Risks and Ethics