1. Faculty of Chemistry, University of Warsaw, 1 Pasteura St., 02-093 Warsaw, Poland
2. Electron Microscopy for Materials Research, University of Antwerp, Groenenborgerlaan, 171, 2020 Antwerp, Belgium
3. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
4. Department of Chemistry, Uppsala Universitet, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
5. Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany