1. Department of Chemistry, University of Crete 710 03 Heraklion, Crete, Greece
2. Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece
3. Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece
4. Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece