1. Department of Chemistry; University of Cyprus; 75 Kallipoleos Avenue P.O.Box 20537, 1678 Nicosia Cyprus
2. Department of Mechanical and Manufacturing Engineering; University of Cyprus; 75 Kallipoleos Avenue P.O.Box 20537, 1678 Nicosia Cyprus
3. Department of Physics; University Politehnica of Bucharest; No 133 Splaiul Independentei Street 060042 Bucharest Romania