1. Department of Chemistry and Pharmacy
2. University di Sassari
3. I-07100 Sassari
4. Italy
5. Nanotechnology Department
6. Institute of Materials Research
7. Helmholtz-Zentrum Geesthacht Max-Planck
8. Geesthacht
9. Germany
10. Deutsches Elektronen Synchrotron DESY
11. Photon Science
12. Hamburg
13. Department of Condensed Matter Physics
14. Dipartimento di Ingegneria Meccanica
15. Chimica e dei Materiali
16. Università degli Studi di Cagliari
17. 09123 Cagliari