Sekhar Chandra Ray is Professor of Physics at the University of South Africa, specializing in Experimental Condensed Matter Physics.His research focuses on carbon nanostructure materials on bio-imaging processes and photovoltaic materials. He has published 78 peer-reviewed research articles, with more than 1100 citations in internationally recognised journals.Nikhil R. Jana is Associate Professor at the Centre for Advanced Materials, Indian Association for the Cultivation of Science, India. His research interests focus on using nanoparticles and surface chemistry for biomedical applications.