1. Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
2. I. Physical Institute, Faculty of Physics, Georg-August-University Göttingen, 37077 Göttingen, Germany
3. Physics of Nanosystems, Department of Physics, Ludwig-Maximilians-University München, 80799 Munich, Germany
4. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
5. Faculty of Chemistry and Pharmacy, University of Sofia, 1164 Sofia, Bulgaria
6. Central Facility for Electron Microscopy, Electron Microscopy of Materials Science Central, Facility for Electron Microscopy, Ulm University, 89081 Ulm, Germany
7. Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden, Germany
8. National Institute for Materials Science, 305-0047 Tsukua, Japan
9. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Leipzig Research Branch, 04316 Leipzig, Germany
10. Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722 Korea
11. Max Planck Institute for Microstructure Physics, Weinberg 2, Halle (Saale), D-06120 Germany