1. Department of Chemistry, University of Patras, Patras 26504, Greece
2. Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
3. Inorganic Nanocrystals Laboratory, Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
4. Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia 1678, Cyprus