1. Materials Center Leoben Forschung GmbH, 8700 Leoben, Austria
2. Graz Centre for Electron Microscopy, 8010 Graz, Austria
3. Institute for Electron Microscopy and Nanoanalysis, Graz University of Technology, 8010 Graz, Austria
4. Electrical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
5. Institute of Solid State Electronics, Vienna University of Technology, 1040 Vienna, Austria