1. CNR NANOTEC
2. Institute of Nanotechnology
3. 73100 Lecce
4. Italy
5. Department of Chemistry and Industrial Chemistry
6. University of Pisa
7. 56124 Pisa
8. IC CNR
9. Institute of Crystallography
10. I-70126 Bari
11. Centro S3
12. CNR Istituto Nanoscienze
13. 41125 Modena
14. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons
15. Forschungszentrum Jülich
16. 52425 Julich
17. Germany
18. Department of Mathematics and Physics E. De Giorgi