1. Departamento de Física FC, State University of São Paulo (UNESP), C.P. 473, 17033-360 Bauru, SP, Brazil, Laboratório de Nanomateriais, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil, Synchrotron SOLEIL, L’Orme des Merisiers, BP48, 91192 Gif-sur-Yvette, France, and Instituto de Química, State University of São Paulo (UNESP), C.P. 355, 14801-907 Araraquara, SP, Brazil