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Alloy Nanoparticles

Alloy Nanoparticles are cornerstones of nano science and nanotechnology. Nano structure science and technology is a broad and interdisciplinary area of research and development activity that has been growing explosively worldwide in the past few years. It has the potential for revolutionizing the ways in which materials and products are created and the range and nature of functionalities that can be accessed. It is already having a significant commercial impact, which will assuredly increase in the future. Some nano materials occur naturally, but of particular interest are engineered nano materials (EN), which are designed for, and already being used in many commercial products and processes. They can be found in such things as sunscreens, cosmetics, sporting goods, stain-resistant clothing, tires, electronics, as well as many other everyday items, and are used in medicine for purposes of diagnosis, imaging and drug delivery.
Alloy Nanoparticles

Alloy Nanoparticles

The two main reasons why Alloy Nanoparticles at the nano scale can have different properties are increased relative surface area and new quantum effects. Nano materials have a much greater surface area to volume ratio than their conventional forms, which can lead to greater chemical reactivity and affect their strength. Also at the nano scale, quantum effects can become much more important in determining the materials properties and characteristics, leading to novel optical, electrical and magnetic behaviors. Nano materials are already in commercial use, with some having been available for several years or decades. The range of commercial products available today is very broad, including stain-resistant and wrinkle-free textiles, cosmetics, sun screens, electronics, paints and varnishes. Nano coatings and nano composites are finding uses in diverse consumer products, such as windows, sports equipment, bicycles and automobiles.
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A Basu,
19-Jan-2009 at 10:27 am
Nanotechnology is an emerging disipline that encompasses an incresingly sophisticated ability to manupulate matters at nanoscale, resulting in new materials, products, and devices taht demonstrate new and usual behaviour. Carbon Nanotubes have emerged as a facinating tool in nanotecnology, which has advantages in several fields: yet there pharma as well as bio applications are being seriously explored.
Ramesh Bansal,
19-Jan-2009 at 10:31 am
STM The Scanning Tunneling Microscope (STM) is a non-optical microscope that scans an electrical probe over a surface to be imaged to detect a weak electric current flowing between the tip and the surface. The STM (not to be confused with the scanning electron microscope) was invented in 1981 by Gerd Binnig and Heinrich Rohrer of IBM>s Zurich Lab in Switzerland. Although initially greeted with some skepticism by materials scientists, the invention garnered the two a Nobel Prize in Physics (1986). The STM allows scientists to visualize regions of high electron density and hence infer the position of individual atoms and molecules on the surface of a lattice. Previous methods required arduous study of diffraction patterns and required interpretation to obtain spatial lattice structures. The STM is capable of higher resolution than its somewhat newer cousin, the atomic force microscope (AFM). Both the STM and the AFM fall under the class of scanning probe microscopes.
A Basu,
19-Jan-2009 at 10:41 am
The main characteristics used for the characterization of the purity and for the structure of tubes are:-Raman spectroscopy which shows the crystalline vibration of the tube showing the difference for other carbon materials (graphite, carbon black, amorphous)-Specific surface area giving an idea about the diameter and the length of the tubes, but the contribution of the two dimensions is not clear at all-Induced Coupled Plasma and/or X-ray purity for elemental analysis-Electrical conductivity gives a picture of the average conductivity of the material under a certain pressure-Microscopy investigations are very expensive and irrelevant due to the very local picture of the material and a very small quantity (~ 1mg or less)

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