Dr. Elias Sakellis received his Ph.D. degree from the Department of Physics, University of Athens. Since then he works as associate researcher at the Department of Physics of the University of Athens and at the Institute of Materials Science of NCSR “Demokritos”. His research interests include the synthesis of nano-structured materials with E-beam PVD, chemical and electrochemical methods as well as the study of their structural, electrical and optical properties with applications in electronics and photonics. He is the co-author of more than 90 research papers with more than 1240 citations and has an extended experience in electrical measurements and dielectric relaxation characterization as a function of temperature and pressure of various materials, as well as, an expertise in structural, crystallographic and electronic configuration characterization of nanostructures with scanning electron microscopy (SEM) transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), high resolution transmission electron microscopy (HRTEM), optical characterization with the use of optical methods such is Photoluminescence spectroscopy (PL) and . He has co-supervised more than 16 graduate and postgraduate students and two PhD thesis. Teaching activities include laboratory supervision of 1st, 2nd and 3rd year undergraduate students at the Physics Department and of the Geological Department of the University of Athens, as well as co-teaching at the Interdepartmental Program of Postgraduate Studies "Microsystems and Nanodevices".