1. Departamento de Física, Universidade Federal de Lavras (UFLA), 37200-900 Lavras, Minas Gerais, Brazil
2. Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, São Paulo, Brazil
3. Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. School of Engineering, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil
5. MackGraphe, Mackenzie Presbyterian Institute, 01302-907 São Paulo, Brazil
6. Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, São Paulo, Brazil