1. Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
2. Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, D-14476 Potsdam, Germany
3. Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, USA
4. Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW Calgary, Alberta T2N 1N4, Canada
5. Department of Materials Science and Engineering, University of Toronto, Ontario, Canada
6. Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP 13565-905, Brazil
7. Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil