1. Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil
2. Department of Physics, University of Alberta, Edmonton, AB T6G 2E1, Canada
3. Federal Institute of Education, Science and Technology of Espírito Santo (IFES), Av. Min. Salgado Filho, 1000, 29106-010, Vila Velha, ES, Brazil
4. Laboratory of Organic Chemistry, Department of Chemistry, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil
5. Institute of Physics Gleb Wataghin – State University of Campinas (UNICAMP), Rua Sergio Buarque de Holanda 777, 13083-859, Campinas, SP, Brazil