1. Department of Physics, Chemistry and MathematicsFederal University of São Carlos (UFSCar)Via João Leme dos Santos Km 11018052‐780 SorocabaBrazil
2. Department of ChemistryFederal University of Technology − Paraná (UTFPR)Via do Conhecimento Km 185503‐390 Pato BrancoBrazil
3. Laboratory of Technological PlasmasSao Paulo State University (UNESP)Av. Três de Março, 51118087‐180 SorocabaBrazil