1. DWI ‐ Leibniz Institute for Interactive Materials Forckenbeckstraße 50 D‐52074 Aachen Germany
2. Lehrstuhl für Biotechnologie RWTH Aachen University D‐52074 Aachen Germany
3. Institute of Technical and Macromolecular Chemistry RWTH Aachen University D‐52074 Aachen Germany
4. Department of Chemistry and Physics of Surfaces and Biointerfaces Institute of Macromolecular Chemistry Czech Academy of Sciences Heyrovsky Square 2 Prague 162 06 Czech Republic