Structural optical morphological and electrical properties of undoped and metal al w and fe doped v2o5 nanostructures

Abstract

The modern history of nanotechnology began in 1959 when Richard Feynman a Nobel Prizewinning physicist delivered a speech titled Theres Plenty of Room at the Bottom The term nano originated from the Greek word nanos which means dwarf A nanometer nm is one billionth of a meter or 109 m The term nanotechnology was used first by the Japanese scientist Norio Taniguchi 19121999 in a 1974 paper on production technology that creates objects and features on the order of a nanometer Nanotechnology is the design characterization production and application of structures devices and systems by controlling shape and size at nanometer scale Obviously there are two approaches to the synthesis of nanomaterials and the fabrication of nanostructures topdown and bottomup Both approaches play very important roles in modern industry and most likely in nanotechnology as well There are advantages and disadvantages in both approaches When the dimensions of materials are reduced to nanoscale they demonstrate unique properties which are different from those of their bulk counterparts For example their optical and electronic properties alter their chemical activities can be increased or decreased and mechanicalstructural stabilities are also changed Nanomaterials have wide range of applications in the field of electronics fuel cells batteries agriculture food industry medicine etc newline