1. Device Technology and Chemical Physics Laboratory, Department of Mechanical Engineering and Materials Science and Engineering, Cyprus University of Technology, 45 Kitiou Kyprianou str., 3041 Limassol, Cyprus
2. Departamento de Física, Universidad Carlos III de Madrid, Avenida Universidad 30, 28911 Leganés, Madrid, Spain
3. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus