Nanoscience broadly deals with science and technology of materials on the atomic and molecular scale, normally 1 to 100 nanometers. In view of considerable developments in the fabrication of devices within this size range in various fields such as applied physics, materials science, interface and colloid science, device physics, supramolecular chemistry, self-replicating machines and robotics, chemical engineering, mechanical engineering, and electrical engineering including drug delivery and in sensing low concentrations, this book focuses on the applications of Nanoscience and Nanotechnology.