Chaudhery Mustansar Hussain is adjunct professor, academic advisor and lab director at the New Jersey Institute of Technology (NJIT), Newark, New Jersey, USA. His research is focused on the applications of nanotechnology in the environment and in electronics. Dr. Hussain is the author of numerous papers in peer-reviewed journals as well as a prolific author and editor of scientific monographs and handbooks. Joydip Sengupta is assistant professor in the Department of Electronic Science of the Jogesh Chandra Chaudhuri College, affiliated to University of Calcutta, India. His research is focused on nanotechnology-based methods for the fabrication and characterization of devices based on carbon nanotubes, zinc oxides and silicon carbides.