1. Hangzhou Institute of Medicine, Chinese Academy of Sciences, 310022 Hangzhou, Zhejiang, China.
2. 2nd Physics Institute, University of Stuttgart, D-70569 Stuttgart, Germany.
3. Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany.
4. Electron Microscopy, Max Planck Institute for Biology Tübingen, 72076 Tübingen, Germany.
5. Department of Biophysics, Institute of Biomaterials and Biomolecular Systems, University of Stuttgart, D-70569 Stuttgart, Germany.
6. Biodesign Center for Molecular Design and Biomimetics, Arizona State University, Tempe, AZ 85287, USA.