Nanotechnology-Present Revolutionary Biotechnology

Abstract

Nanoparticles: Nanotechnology is the science that deals with matter at the scale of 1 billionth of a meter (i.e., 10 -9 m = 1 nm), and is also the study of manipulating matter at the atomic and molecular scale. Metallic nanoparticles have different physical and chemical properties from bulk metals (e.g., lower melting points, higher specific surface areas, specific optical properties, mechanical strengths, and specific magnetizations), properties that might prove attractive in various applications. The optical property is one of the fundamental attractions and a characteristic of a nanoparticle. For example, a 20-nm gold nanoparticle has a characteristic wine red color. A silver nanoparticle is yellowish gray. Platinum and palladium nanoparticles are black. Not surprisingly, the optical characteristics of nanoparticles have been used from