1. Institute of Biophysics of the Czech Academy of Sciences Královopolská 135 61265 Brno Czech Republic
2. TESCAN Brno, s.r.o. Libušina třída 1 62300 Brno Czech Republic
3. Department of Geological Sciences Faculty of Science Masaryk University Kotlářská 2 61137 Brno Czech Republic
4. Central European Institute of Technology Masaryk University Kamenice 5 62500 Brno Czech Republic
5. Institute of Molecular Biology and Pathology, CNR Piazzale A. Moro 5 00185 Rome Italy
6. Physics Department Center for Nanoscience Ludwig-Maximilians-Universität München Amalienstrasse 54 80799 Munich Germany