1. Ruđer Bošković Institute, Bijenička
cesta 54, 10000 Zagreb, Croatia
2. Department of Physics,
Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia
3. Center for Electron Microscopy and Microanalysis, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
4. Department of Chemistry, University of Zürich, Rämistrasse 71, CH-8006 Zürich, Switzerland