1. Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O.
Box 1385, 711 10 Heraklion, Crete, Greece
2. Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografrou, 15 771 Athens, Greece
3. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
4. Department of Chemistry, University of Crete, P.O. Box 2208, 710 03 Heraklion, Crete, Greece