1. Department of General and Inorganic Chemistry, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece, http://www.chem.auth.gr/index.php?lang=en&st=132 http://www.chem.auth.gr/index.php?lang=en&st=93
2. NCSR “Demokritos”, Institute of Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, Department of Materials Science, 15310 Aghia Paraskevi Attikis, Greece