Definitio of nano technology Scale: 1 nm – 100 nm (1 nm = 1 billionth or 10-9of a meter) Creating nanoscale size materials does not mean nanotechnology is involved Material must have unique properties (e.g. electrical, physical, chemical, optical) that are different that the bulk properties Achieving those unique properties must be repeatable and controllable
Nanomaterials offer the potential for unprecedented material performance that could Solve major societal problems(e.g. energy, medicine, environment, manufacturing, communications, computing, and security) Energize the economy for decades Revitalize existing businesses (e.g. forest products) Boost competitiveness globally Create entirely new industries
Gold nanoparticles, known as nano gold or colloid gold, is a suspension of sub- micrometre-sized particles (10nm or more) in a fluiod, usually water. If the particle is less than 100nm, a intense red colour is usually observed, but if larger, a dirty yellowish colour is observed in the supension. It is a semi-conductor as well.
Health and medical applications Cancer Nano gold reflects light very well. Many cancers have receptors on their outer layers, in which gold nanoparticles can be bound to antibodies which attach to the cancer cell receptors, and can be viewed under siple white light microscope to detect cancer cells by seeing the reflection of light. Also, ability for gold nano rods to be inserted into cancer cell to weaken the cancer and eventually kill it poses potential to be cancer cure.
The combination of microwave radiation and colloidal gold can destroy the beta-amyloid fibrils and plaque which are associated with Alzheimer's disease. The possibilities for numerous similar radiative applications are also currently under exploration. Gold nanoparticles are being investigated as carriers for drugs such as Paclitaxel. Nanosized particles are particularly efficient in evading the reticuloendothelial system.
carbon nanotubes are extremely strong, probably one of the strongest materials that is even theoretically possible. Although nanotubes are only about a nanometer wide, they can be very long in comparison to their width, a useful property for strength. it will be the strongest fiber available
Single-walled carbon nanotubes are excellent conductors, and many computing companies are developing ways to use them in computers. The use of carbon nanotubes will allow the computing industry to create computers more powerful than those which can be fabricated via the conventional method of photolithography. Carbon nanotubes are capable of ballistic electron transport, meaning they are excellent conductors in the direction of the tube. This led them to be proposed as the ideal building material for the next generation of televisions, although the improvements of LCDs, including OLCDs, makes this unlikely in the near-term future
As a semi-conductor for headsink Carbon nanotubes' electronic properties optimized for future applications
Nanosensors are any biological, chemical, or sugery sensory points used to convey information about nanoparticles to the macroscopic world. Their use mainly include various medicinal purposes and as gateways to building other nanoproducts, such as computer chips that work at the nanoscale and nanorobots. Presently, there are several ways proposed to make nanosensors, including top-down lithography, bottom-up assembly, and molecular self-assembly
Nanosensor chips work at the nanoscale and nanorobots The produce of nanosensor involve attaching a single particle onto the end of a carbon nanotube and measuring the vibrational frequency of the nanotube both with and without the particle
This video gives a brief introduction to the applications of nanomaterials in real life. http://www.youtube.com/watch?v=abrFSh65 3zE http://www.youtube.com/watch?v=abrFSh65 3zE This video shows the use of nanomaterials in technology area.(Carbon nanotubes) http://www.youtube.com/watch?v=ikYhyjPj KBs&feature=related http://www.youtube.com/watch?v=ikYhyjPj KBs&feature=related