1. Institute of Technology for Nanostructures (NST), Faculty of Engineering & CENIDE, University of Duisburg-Essen (UDE), Bismarckstraße 81, 47057 Duisburg, Germany
2. Components for High Frequency Electronics (BHE), Faculty of Engineering & CENIDE, University Duisburg-Essen (UDE), Lotharstrasse 55, 47057 Duisburg, Germany
3. Interdisciplinary Center for Analytics on the Nanoscale (ICAN) & CENIDE, University of Duisburg-Essen (UDE), Carl-Benz-Str. 199, 47057 Duisburg, Germany