Seminar On Nanotechnology. By Vijay.N Vishak.M 5 th Sem C.S.E. Seminar Contents. History of Nanotechnology. Introduction of Nanotechnology. Applications of Nanotechnology. Information and Communication Technology (ICT). Nanochip Designing. Carbon Nanotubes.
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Seminar On Nanotechnology
5th Sem C.S.E
The amount of space available to us for information storage (or other uses) is enormous. As first described in a lecture titled, 'There's Plenty of Room at the Bottom' in 1959 by Richard P. Feynman, there is nothing besides our clumsy size that keeps us from using this space. In his time, it was not possible for us to manipulate single atoms or molecules because they were far too small for our tools.
He described how the laws of physics do not limit our ability to manipulate single atoms and molecules. Feynman explored the possibility of manipulating the materials at a scale of individual atoms and molecules, imagining the whole of the encyclopedia Britannica written on the head of the pin.
Prof. Feynman described such atomic scale fabrication as a bottom-up approach, as opposed to the top-down approach that we are accustomed to.
Top-down Manufacturing :- It involves the construction of parts through methods such as cutting, carving and molding. Using these methods, we have been able to fabricate a remarkable variety of machinery and electronics devices.
Bottom-up manufacturing :- On the other hand, would provide components made of single molecules, which are held together by covalent forces that are far stronger than the forces that hold together macro-scale components. Further more, the amount of information that could be stored in devices build from the bottom up would be enormous
It is small systems can be seen as an extension of biotechnology. For example, to create a molecular motor about the size of a virus, scientists have combined genetically engineered proteins with other chemically structured components.
It is possible to create new kinds of materials by working at the nanolevel. One of the first nanomaterials was the “carbon nanotube”, which conducts electricity better than copper yet is stronger and lighter than steel.
Standard computer chips, which soon will have minimum feature sizes below 100 nanometers, will inevitably enter the realm of nanotechnology.
Fig :- Multi – walled carbon nanotube
Fig :-Single-walled carbon Nanotube
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