1. Department of Energy Conversion and Storage
2. Technical University of Denmark
3. 2800 Kongens Lyngby
4. Denmark
5. Institute of Physics
6. University of Brasilia
7. Brasilia
8. Brazil
9. Laboratoire de Physicochimie des Polymères et des Interfaces
10. EA 2528
11. CY Cergy Paris Université
12. Cergy-Pontoise Cedex
13. France