Nanotechnology a big things
Imagine a doctor injecting a patient with tiny devices that can rove the body in search of cancer cells or disease causing bacteria. Such device would deliver medicine targeted sp-ecifically to a diseased organ or to the bacteria. Though still years away scientists are trying to make such a scenario possible through nanotechn-ology, a hot research area in which scientists use atoms and molecules to build materials that can be used in many areas, such as health care, clean energy sources, and shrinking electronics. Nanotechnology.
These “nanomaterials” measure bet-ween 1 and 100 nanometers. Derived from “nanos” – the Greek word for a small person a nanometer is 1 bill-ionth of a meter. In comparison, a strand of hair is roughly 100, 000 nanometers wide. Various techniques and products based on nanoscale particles are described in brief.
1. Drug – Delivery technique :
Dendrimers are a type of nanostru-cture that can be precisely designed and manufactured for a wide varie-ty of applications, including the tre-atment of cancer and other diseases Dendrimers carrying different mater-ials an their branches can do sev-eral things at one time, such as re-cognising diseased cells, diagonising diseased states, drug delivering and reporting outcomes of therapy.
2. Nano films :
Different nanoscale materials can be used in thin films to make them water repellent, anti – reflective, self – cleaning, ultraviolet or infrared – resi-stant, scratchresistant and electrically conductive. Nano films are used now on eyeglasses, computer display and cameras to protect or treat the sur-faces.
3. Water filtration technique :
Researches are experimenting with carbon nanotubes based membranes for water desalination and nanoscale sensors to identify contaminants in water system. Other nanoscale mate-ials that have great potential to fil-ter and purify water include nano-scale titanium dioxide, which is us-ed in sunscreen and which has be-en shown to neutralize bacteria.
4. Nano tubes :
Carbon nanotubes are allotropes of carbon with a cylindrical nanostruc-ture. Nanotubes have been construc-ted with length to diameter ratio of up to 28, 000, 000 : 1, which is signif-icantly larger than any other mater-ial. These cylindrical carbon molecu-les have novel properties that make them potentially useful in many ap-plications in nanotechnology, electro-nics, optics and other fields of mat-erials science, as well as potential uses in architectural fields. They ex-hibit extraordinary strength and un-ique electrical properties and are efficient conductors of heat.
5. Nanoscale Transistors
Transistors are electronic switching devices where a small amount of electricity is used like a gate to control the flow of larger amount of electricity. In computers, the more transistors, the greater the power. Transistors sizes have been decreas-ing, so computer have become more powerful. Until recently, the industry is best commercial technology prod-uced computer chips with transistor having 45 – nanometer features.
6. Nanotechnology and space
It may hold the key to making sp-ace flight more practical. Advance-ments in nanomaterials make light weight solar sails and a cable for the space elevator possible. In add-ition, new materials combined with nanosensors and nanorobots could improve the performance of space-ships, spacesuits, and the equipment used to explore planets and moons, making nanotechnology an important part of the ‘final frontier’ .
Today, many of our nations most creative scientists and engine-ers are finding new ways to use nanotechnology to improve the wor-ld in which we live. These researc-hers envision a world in which new materials designed at the atomic & molecular level, provide realistic, co-st effective methods for harnessing renewable energy sources and keep-ing our environment clean. It has opened scientific inquiry to the le-vel of molecules and a world of new opportunities.