1. Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, São Paulo, Brazil
2. Institute of Physics “Gleb Wataghin” (IFGW), University of Campinas (UNICAMP), 13083-859 Campinas, São Paulo, Brazil
3. Department of Materials Engineering, University of São Paulo (USP), 13568-250 São Carlos, São Paulo, Brazil
4. Postgraduate Program in Materials Science and Technology (POSMAT), São Paulo State University (UNESP), 17033-360 Bauru, São Paulo, Brazil
5. Department of Physical Chemistry, Institute of Chemistry (IQ), University of Campinas (UNICAMP), 13084-862 Campinas, São Paulo, Brazil