1. Institute of Nano- and Biotechnologies (INB); Aachen University of Applied Sciences; 52428 Jülich Germany
2. Institute of Applied Polymer Chemistry (IAP); Aachen University of Applied Sciences; 52428 Jülich Germany
3. Peter Grünberg Institute (PGI-8); Research Centre Jülich; 52428 Jülich Germany
4. Institute for Materials Research (IMO); Hasselt University; 3590 Diepenbeek Belgium