Nanotechnology ppt

a brief but illustrative presentation on nanotechnology, its introduction, applications, pitfalls and scope in future.

1. NANOTECHNOLOGY - An Overview Presented by – POOJA CHOUDHARY

2. 2 INDEX I N T R O D U C T I O N T N A N O - T E C H N O L O G Y A P P L I C A T I O N S (CNT ) PITFALLS S C O P E I N F U T U R E

3. 3 NANO & TECHNOLOGY A NANOMETER is a unit of length in the metric system, equal to one billionth of a meter (10^-9). Technology is the making, usage and knowledge of tools, machines and techniques, in order to solve a problem or perform a specific function.

4. 4 WHAT IS NANOTECHNOLOGY ? The study of controlling or manipulating of matter on an atomic and molecular scale. Generally nanotechnology deals with structures sized between 1-100 nanometer in at least one dimension, and involves developing or modifying materials or devices within that size.

5. 5 HISTORY The first ever concept was presented in 1959 by the famous professor of physics Dr. Richard P. Feynman. Invention of the scanning tunneling microscope in 1981 and the discovery of fullerene in 1985 led to the emergence of nanotechnology. The term nanotechnology has been termed by Norio Taniguchi in 1974. -there’s plenty of room at the bottom.

6. HOW SMALL IS NANO? 6

7. 7 APPLICATIONS

8. 8 CARBON NANOTUBE CNT’S are allotropes of carbon with a cylindrical nanostructures. They have length to diameter ratio of upto 132,000,000:1. Nanotubes are members of the fullerene structural family. Their name is derived from their long, hollow structure with the walls formed by one atom thick sheets of carbon, called graphene .

9. 9 PROPERTIES Highest strength to weight ratio, helps in creating light weight spacecrafts . Easily penetrate membranes such as cell walls. Helps in cancer treatment . Electrical resistance changes significantly when other molecules attach themselves to the carbon atom. Helps in developing sensors that can detect chemical vapours .

10. 10 APPLICATIONS Replacing transistors from the silicon chips as they are small and emits less heat. In electric cables and wires. In solar cells. In fabrics. Research is expected to lead to new materials, lubricants and medical applications. Devices or energy storage and energy conversion. Sensors. Reduces the damages caused by treatments such as chemo.

11. 11 ADVANTAGES OF CNT Produces smaller and faster components. This will also result in computers that consume less energy. High speed and high capacity memory. Allow circuits to be more accurate on the atomic level.

12. 12 THE GOD PARTICLE The higgs boson(found in march 2013) is a particle that gives mass to other particles. Peter higgs was the first person to think of it. It is found everywhere. The higgs particle is a boson. Bosons are particles responsible for all the physical forces except gravity. These particles are believed to exist for less than a septillionth of a second. Because the higgs has so much mass(compared to other particles), it takes a lot of energy to create one( the large hadron collider is the equipment scientists use).

13. 13 PITFALLS Nanoparticles can get into the body through the skin, lungs and digestive system , thus creating free radicals that can cause cell damage. Once nanoparticles are in the bloodstream, they will be able to cross the blood-brain barrier. The most dangerous nano - application use for military purposes is the nano -bomb that contain engineered self multiplying deadly viruses that can continue to wipe out a community, country or even a civilization. Nanobots because of their replicating behavior can be a big threat for GRAY GOO .

14. 14 SCOPE IN FUTURE Nanotechnology may make it possible to manufacture lighter, stronger and programmable materials that require less energy to produce than conventional material and that promise great fuel efficiency in land transportation, ships, aircrafts and space vehicles. The future of nanotechnology could very well include the use of nanorobotics . These nanorobots have the potential to take on human tasks as well as tasks that humans could never complete. The rebuilding of the depleted ozone layer could potentially be able to be performed. There would be an entire nano surgical field to help cure everything from natural aging to diabetes to bone spurs.

15. 15 CONCLUSION. As a conclusion to this topic I would like to say that Nanotechnology is a brand new technology that has just began, it is a revolutionary science that will change all what we knew before. The future that we were watching just in science fiction movies will in the near future be real. This new technology will first of all, keep us healthy because of nanorobots that will repair every damage that we have in our body . Secondly it will give scientists the ability to manipulate the combination of atoms in an object and to turn it into a lighter, stronger, and more durable object than before, just by using carbon nanotubes that are known to be a hundred times stronger than steel and in addition to that they are very flexible. Thirdly, Nanotechnology will give us an abundant energy because it will transform energy more effectively. - THE NEXT BIG TING IS VERY SMALL.