1. Department
of Chemistry, University of Rome “Sapienza”, P.le A.
Moro 5, 00185 Rome, Italy
2. Center for Nanotechnology for
Engineering (CNIS), University of Rome “Sapienza”, P.le A. Moro 5, 00185 Rome, Italy
3. Department of Physics, FC-UNESP, Av. Eng.
Luiz Edmundo Carrijo Coube 14-01,
17033-360 Bauru, Brazil
4. POSMAT-Programa de Pós-Graduação
em Ciência e Tecnologia de Materiais, UNESP-Univ Estadual Paulista, Bauru, SP, Brazil
5. Department of Physics, Unità INSTM and CISDiC University Roma Tre,
Via della Vasca Navale 85, 00146 Rome, Italy