1. Department of Molecular Medicine, Center for Health Technologies (CHT), INSTM UdR of Pavia, University of Pavia, 27100 Pavia, Italy
2. Department of Chemistry, University of Pavia, 27100 Pavia, Italy
3. Department of Chemistry, Physical Chemistry Section, Center for Colloid and Surfaces Science, University of Pavia, 27100 Pavia, Italy
4. Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 Pavia, Italy
5. Medicina Clinica-Specialistica, UOR5 Laboratorio di Nanotecnologie, ICS Maugeri, IRCCS, 27100 Pavia, Italy
6. Department of Physics, University of Pavia, 27100 Pavia, Italy