1. Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems, Heisenbergstr. 3,
70569 Stuttgart, Germany
2. Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253,
69120 Heidelberg, Germany
3. Stuttgart Center for Electron Microscopy, Max Planck Institute for Intelligent Systems, Heisenbergstr. 3,
70569 Stuttgart, Germany