1. Department of Chemistry; University of Fribourg; Chemin du Musée 9 1700 Fribourg Switzerland
2. National Centres of Competence in Research in Chemical Biology (Geneva) and Bio-inspired Materials; Fribourg Switzerland
3. Adolphe Merkle Institute; University of Fribourg; Chemin du Verdiers 4 1700 Fribourg Switzerland
4. Paul Scherrer Institute (PSI); OFLB/010 5232 Villigen PSI Switzerland
5. Max Planck Institute of Colloids and Interfaces; Research Campus Potsdam-Golm 14476 Potsdam Germany