1. Research Center on Advanced Materials and Energy; São Carlos Federal University C. Postal 676, CEP; 13565-905 São Carlos (SP) Brazil
2. Institute of Chemistry; Federal University of Goias, CEP; 74001-970 Goiania (GO) Brazil.
3. Department of Basic Studies and Instrumentals; Bahia State University of Southwestern, CEP; 45700-000 Itapetininga (BA) Brazil.
4. Institute of Physics; University of Brasilia, CEP; 70910-900 Brasilia (DF) Brazil.
5. Institute of Physics; Federal University of Goias, CEP; 74001-970 Goiania (GO) Brazil.