1. Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
2. International Iberian Nanotechnology Laboratory (INL), Water Quality group, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal
3. Chemistry Department, University of Fribourg, Chemin du Musée 9, Fribourg, CH-1700, Switzerland