1. Department of Chemistry, University of Patras, 26504 Patras, Greece
2. Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
3. Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia 1678, Cyprus
4. Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá 18233, Panamá
5. Institute for Quantum Materials and Technology (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
6. Physikalisches Institut, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
7. Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Olomouc 771 47, Czech Republic