1. Nanoscience Department, Universidade Franciscana, 97010-032 Rio Grande do Sul-RS, Brazil
2. LAQV-REQUINTE of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169- 007 Porto, Portugal
3. Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain