1. Ilum School of Science, Centro Nacional de Pesquisa em Energia e Materiais − CNPEM, Campinas, São Paulo 13087-548, Brazil
2. Solid-Biological Interface Group (SolBIN), Department of Physics, Universidade Federal do Ceará − UFC, P.O. Box 6030, Fortaleza, Ceará 60455-900, Brazil
3. Laboratório de Materiais Funcionais Avanȩados (LAMFA), Department of Physics, Universidade Federal do Ceará − UFC, Fortaleza, Ceará 60455-900, Brazil
4. Department of Physics, Universidade Federal do Ceará − UFC, Fortaleza, Ceará 60455-900, Brazil
5. AT&T Labs Research, 200 South Laurel Avenue, Middletown, New Jersey 07748, United States
6. Engineering School of Sustainable Infrastructure & Environment, Department of Environmental Engineering Sciences, University of Florida, Gainesville, Florida 32611-6540, United States