1. Institute of Organic Chemistry II and Advanced
Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
3. Center for Nanotechnology and Physikalisches
Institut, Westfälische Wilhelms-Universität Münster, Heisenbergstrasse
11, 48149 Münster, Germany