1. CNR-NANOTEC, Bari; Via Amendola 122/D- 70126 Bari Italy
2. CNR-ISM, FLASH-IT Unit, Tito Scalo, C.da S. Loja-Zona Industriale-; 85050 Tito Scalo PZ Italy
3. University of Bari; Chemistry Department; Via Orabona 4 70125 Bari Italy
4. CNR-IPSP, Bari; Via Amendola 165 70126 Bari Italy