Dr Dimitrios Vlachos is an Assistant Professor in the Department of Physics at University of Ioannina in Greece. His expertise is Surface Science and he is mainly focused on the development and characterization of nanostructures of metals and oxides on surfaces and their interaction with gases and other elements. He is particularly interested in the catalytic and photoelectric properties of these systems. Dr Vlachos obtained his PhD in 1997 at the University of Ioannina and has an academic/research profile previously developed at FOM Institute in Holland, Techniche Universität Clausthal in Germany, University of Glasgow and University of Warwick in UK, and several synchrotron radiation laboratories such as BESSY in Germany, Daresbury in UK, MaxLab in Sweden and ELETTRA in Italy. He has been involved in several research projects mainly supported by European Union, being principal coordinator in two of them. He has published 35 papers in peer-reviewed journals and he is reviewer for several journals and research programme proposals. He has participated in more than 30 national and international conferences. He has given at about 30 talks as participant and visiting researcher. He has supervised 5 Ms degree students and he is the author of a e-book. Finally his academic tutorial duties concern Mechanics, Electromagnetism, Thermodynamics, Statistics, Computing, and Laboratories of General Physics (Mechanics, Thermodynamics, Waves, Optics, Physical Chemistry).