1. Laboratory for Environmental and Applied Nanoscience, Faculty UnB—Planaltina, University of Brasília, Brasília 73345-010, DF, Brazil
2. Complex Fluids Group, Institute of Physics, University of Brasília, Brasília 70919-970, DF, Brazil
3. Institute of Chemistry, University of Brasília, Brasília 70910-900, DF, Brazil
4. National Research Council, Institute for the Study of Nanostructured Materials, P.O. Box 10, Monterotondo Scalo, 00010 Rome, Italy