What are nanodevices & nanoelectronics?

Question

where can i get info about them?

Answer 1

Those are examples of nanotechnology, a more general term for which you should be able to find a lot of documentation. Nanotechnology refers to any technology containing structures on the nanoscale, that is, having dimensions on the order of 100 nm or smaller. (nm is the abbreviation for nanometer, meaning 10^-9 m, or one billionth of a meter.) When you see the prefix "nano," it generally refers to this scale. A nanotube is a tube less than 100 nm in diameter. Nanosheets are less than 100 nm thick. Nanotechnology is even smaller and more sophisticated than MEMS, or microelectromechanical systems, which were cutting edge less than ten years ago.

Answer 2

Strictly speaking nanotechnology is the use and investigation of materials that have size features between 1-100nm. (1nm = 1x10^-9 m) Nanomaterials include nanoparticles (usually magnetic iron oxide, or noble metals like gold or silver), quantum dots (which are semiconductor nanoparticles), carbon nanotubes, nanowires, etc..Nanomaterials constitute an emerging subdiscipline in the chemical and materials sciences (1, 2).Devices made of nanomaterials are referred as nanodevices. Nanomaterials have numerous commercial and technological applications, including analytical chemistry (3-6); drug delivery; bioencapsulation; and electronic, optical, and mechanical devices. In addition, this field poses an important fundamental question--how do the electronic, optical, and magnetic properties of a nanoscopic particle differ from those of a bulk sample of the same material.Nanomaterials exhibit interesting properties that differ from the bulk material because of their small size. They have high surface area to volume ratios. They even have size tunable properties, ie solutions of semiconducting quantum dots of the same material can fluoresce (glow) with colors all through the visible spectrum. Smaller ones ~4nm glow violet, and getting larger they cover all of the colors of the rainbow to red.Transistors are the basic building blocks of integrated circuits. To use nanotubes in future circuits it is essential to be able to make transistors from them. Engineers have successfully fabricated and tested nanotube transistors using individual multi-wall or single-wall nanotubes as the channel of a field-effect transistor (FET).They measured the electrical characteristics of nanotube-FETs and found that they can change the amount of current (ISD) flowing through the nanotube channel by a factor of 100,000 by changing the voltage applied to a gate..As they cooled the FET down from room temperature to 4 degree Kelvin (minus 460 degree Fahrenheit),they observed that the device behavior change dramatically. While the device acts like a field-effect transistor at room temperature, at 4K it behaves like a single-electron transistor (SET). Study for theComputation and theory of the electrical and mechanical properties.&The current-voltage curve etccetera of such smaller nano device is normally referred as nano electronics.You can get more at Ref.Some articles on the web •There's plenty of room at the bottom, •Molecular engineering: an approach to the development of general capabilities for molecular manipulation, by K. Eric Drexler. The first journal article on molecular nanotechnology. •Atomistic design and simulations of nanoscale machines and assembly.. Other sites
•The Foresight Institute
•KurzweilAI.net
•Wikipedia has an article on molecular nanotechnology
•The National Nanotechnology Initiative
•Nanotechnology Industries
•UCLA's chemistry page has many links to chemistry-related topics.
•The NanoLink list of nanotechnology web sites.

Answer 3

The word nano was invented by M I T (Mass. Inst. of Tech) and meens one / one millionth of an inch.