1. Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide) University of Duisburg-Essen Universitätsstraße 5–7 45117 Essen Germany
2. Interdisciplinary Center for Analytics on the Nanoscale (ICAN) NETZ University of Duisburg-Essen Carl-Benz-Str. 199 47047 Duisburg Germany
3. Institute for Metallic Materials Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstrasse 20 01069 Dresden Germany
4. Institute of Applied Physics Dresden University of Technology 01069 Dresden Germany
5. Institute of Materials Science Dresden University of Technology 01069 Dresden Germany
6. Faculty of Physics University of Bielefeld 33501 Bielefeld