1. Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277 Dresden, Germany
2. Institute of Physical Chemistry and Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
3. Materials Science Centre and Faculty of Physics, Philipps University Marburg, Hans-Meerwein-Strasse 6, 35043 Marburg, Germany
4. Micro- and Nanoanalytics Group, University of Siegen, Paul-Bonatz Str. 9-11, 57076 Siegen, Germany
5. Inorganic Non-Metallic Materials, Technical University Dresden, 01062 Dresden, Germany