1. Laboratory of Functional Materials, Institute of Chemistry, University of Campinas—UNICAMP, 13083-970 Campinas, São Paulo, Brazil
2. Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Giuseppe Máximo Scolfaro 10000, Polo II de Alta Tecnologia, 13083-100 Campinas, São Paulo, Brazil
3. Department of Applied Physics, “Gleb Wataghin” Institute of Physics (IFGW), University of Campinas (UNICAMP), 13083-859 Campinas, São Paulo, Brazil