1. Department of Materials Science Institute for Micro- and Nanostructure Research IMN, Friedrich-Alexander University Erlangen-Nuremberg (FAU), Cauerstrasse 3, 91058 Erlangen, Germany
2. Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander University of Erlangen-Nuremberg (FAU), IZNF, Cauerstrasse 3, 91058 Erlangen, Germany
3. Department of Materials Science WW4 LKO, Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Martensstrasse 7, 91058 Erlangen, Germany
4. Department of Physics, Institute for Crystallography and Structural Physics, Staudtstrasse 3, 91058 Erlangen, Germany
5. Division of Superconductivity and Magnetism, Insitute of Experimental Physics II, University of Leipzig, 04103 Leipzig, Germany
6. PhotoCatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands