Dimitrios P. Nikolelis is Professor. of Analytical and Environmental Chemistry at the University of Athens, Greece. The co-ordinator of several Europe- and NATO-wide research projects focusing on biosensors and nanotechnology, and has also served as Editor-in-Chief of five peer-reviewed journals.Georgia-Paraskevi Nikoleli is based at the Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, University of Athens, Greece. Her research is in the area of nanotechnology, looking at multifunctional new materials and the production of processes and new devices.