1. Department
of Physics, Università di Pavia, and Consorzio INSTM, Pavia I-27100, Italy
2. Institute of Physics
of Biological Systems, EPFL, Lausanne CH-1015, Switzerland
3. Department of Medical Imaging Techniques, Dokuz Eylul University, Izmir, Turkey
4. Department
of Physics and Astronomy, Università di Bologna, and Consorzio INSTM, Bologna I-40127, Italy
5. Department
of Chemistry, Università di Firenze, and Consorzio INSTM, Sesto Fiorentino I-50019, Italy
6. CNR-ISTM, Padova I-35131, Italy
7. Department
of Chemistry, Università degli Studi di Milano, and Consorzio INSTM, Milano I-20133, Italy
8. Physics
Engineering Department, Hacettepe University, Ankara, Turkey
9. CNR-ISTM, Milano I-20133, Italy
10. Dipartimento
di Fisica e Scienze della Terra, Università degli Studi di Parma, Parma I-43124, Italy
11. CNR-ICCOM, Sesto Fiorentino I-50019, Italy
12. Department
of Chemistry, Università di Pavia, and Consorzio INSTM, Pavia I-27100, Italy
13. Department
of Physics, Università degli Studi di Milano, and Consorzio INSTM, Milano I-20133, Italy
14. Istituto
di Nanoscienze,
CNR, Modena I-41125, Italy