1. Department of Materials, Polymer ChemistryETH Zurich Vladimir-Prelog Weg 5 8093 Zürich Switzerland
2. Department of PhysicsUniversity Basel Klingelbergstrasse 82 4056 Basel Switzerland
3. Laboratory for Micro- and NanotechnologyPaul Scherrer Institute 5232 Villigen Switzerland
4. School of Life ScienceUniversity of Applied Sciences and ArtsNorthwestern Switzerland Gründenstrasse 40 4132 Muttenz Switzerland
5. Max Planck Institute for Colloids and Interfaces Potsdam-Golm Science Park 14476 Potsdam Germany
6. Department of Materials, Polymer PhysicsETH Zurich Leopold-Ruzicka-Weg 4 8093 Zürich Switzerland
7. Department of ChemistryUniversity of Nevada Reno NV 89557-0216 USA