1. Swiss Federal Laboratories for Materials Science and Technology Empa Überlandstrasse 129 8600 Dübendorf Switzerland
2. Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
3. Department of Physics Applied Physics, and Astronomy Rensselaer Polytechnic Institute Troy 12180 New York USA
4. Current address: Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Univ. Bourgogne Franche-Comté 9 Av. A. Savary, BP 47 870 21078 Dijon Cedex France
5. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge 37831 Tennessee USA
6. Center for Advancing Electronics Dresden (cfaed), Department of, Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
7. Max Planck Institute for Polymer Research 55128 Mainz Germany
8. Current address: Nanotechnology on Surfaces Laboratory Instituto de Ciencia de Materiales de Sevilla CSIC-Universidad de Sevilla c/Américo Vespucio 49 41092 Sevilla Spain
9. Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland