1. Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstraße 5 – 13, 81377 München, Germany
2. Center for NanoScience, Ludwig-Maximilians-University Munich, Geschwister-Scholl Platz 1, 80539 München, Germany
3. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf e.V., Bautzner Landstraße 400, 01328 Dresden, Germany
4. Department of Microbiology, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands