1. CDMF, LIEC, Chemistry Department, Federal University of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil
2. Physics Department, Federal University of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil
3. IFSC—Instituto de Física de São Carlos, Universidade de São Paulo—(USP), 13566-590 São Carlos, São Paulo, Brazil
4. Brazilian Nanotechnology National Laboratory (LNNano), Rua Giuseppe Maximo Scolfa no 10000, BR-13083100 Campinas, São Paulo, Brazil
5. Department of Analytical and Physical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain