1. Institute of Organic Chemistry Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
2. Institute of Macromolecular and Organic Chemistry Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
3. Central Facility for Electron Microscopy Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
4. DWI – Leibniz-Institute for Interactive Materials Forckenbeckstraße 50 52074 Aachen Germany