Nanomaterials and nanodevices of relevance to water, energy and healthcare

Abstract

If one were to close eyes and imagine the smallest possible object on earth, nano will surely be three orders lower in size! Nanoscience refers to objects of very small length scale beyond visual inspection. Nano in Greek means dwarf, but is infinitely smaller than a dwarf. Nano is nothing but a scale that refers to one billionth (10-9) of a meter [1]. A mere imagination of the entire world of nano is enough to create great excitement and fervor - something, which may be called as Nanomania In nanoworld, the objects can neither be seen with naked eyes, nor touched or manipulated with hands like in the real world [2]. Various examples of objects above and below the nano length scale are shown in Figure