1. Institute
of Chemistry, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, Av. Bento Gonçalves 9500, Bairro Agronomia, Porto Alegre, RS, CEP 91501-970, Brazil
2. Institute of Polymers, Composites and Biomaterials
(IPCB)-CNR c/o ENEA, P.
le E. Fermi 1, Loc. Granatello, 80055 Portici, NA, Italy
3. MackGraphe
(Graphene and Nano-Material Research Center), Mackenzie Presbyterian University, Rua da Consolação 896, São Paulo, SP, CEP 01302-907, Brazil