1. Departamento de Físico-Química, Universidade Estadual Paulista, Rua Professor Degni, 55, Araraquara, SP 14800-060, Brazil
2. Département de Génie physique, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montréal, QC H3C 3A7, Canada
3. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States