1. Inorganic Materials Chemistry, Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
2. RUBION, Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
3. Chair of Applied Laser Technologies, Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany
4. FES Sensor Technology GmbH, Von-Steuben-Str. 11, 47803 Krefeld, Germany
5. Nanostructured Sensor Materials, Fraunhofer Institute for Microelectronic Circuits and Systems, Finkenstr. 61, 47057 Duisburg, Germany