1. Department of Materials Science, University of Patras, Patras 265 04, Greece
2. Foundation for Research and Technology Hellas-Institute of Chemical Engineering Sciences (FORTH/ICE-HT), 26504 Rio-Patras, Greece
3. Department of Physics, University of Patras, Patras 265 04, Greece
4. Department of Pharmacy, School of Health Sciences, University of Patras, 26504 Patras, Greece
5. Department of Materials Science & Engineering, University of Ioannina, Ioannina 451 10, Greece
6. Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research “Demokritos”, 15310 Athens, Greece
7. Department of Geology, University of Patras, Patras 265 04, Greece