1. Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich CH-8093, Switzerland
2. Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
3. Centre de RMN à Trés Hauts Champs, Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1), Université de Lyon, 69100 Villeurbanne, France
4. Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, A-4040 Linz, Austria
5. Laboratoire d’Electronique Moléculaire, Organique et Hybride, CEA Grenoble, INAC, SPrAM UMR 5819 (CEA/CNRS/UJF-Grenoble 1), 38054 Grenoble cedex 9, France
6. Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
7. Institut Jean Lamour, Université de Lorraine, UMR 7198, 54506 Vandoeuvre-lès-Nancy Cedex, France