1. Max Planck Institute for Solid State Research Stuttgart, Heisenbergstraße
1, 70569 Stuttgart, Germany
2. Department of Chemistry and
Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität, Butenandtstraße 5-13, 81377 München, Germany
3. Max Planck Institute for Intelligent Systems, Stuttgart Centre for Electron
Microscopy, Heisenbergstraße 3, 70569 Stuttgart, Germany