1. Physical
Chemistry Department, Faculty of Chemistry, and NANOMAG Laboratory, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
2. National
Institute of Laser Enhanced Sciences, Cairo University, 12613 Giza, Egypt
3. Dipartimento
di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, I-90128 Palermo, Italy