1. Institute
of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
2. MIND-Department
of Electronics, Universitat de Barcelona (UB), Martí i
Franquès 1, 08028 Barcelona, Spain
3. Institute
of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona (UB), Martí i Franquès 1, 08028 Barcelona, Spain
4. University
Servicecenter for TEM (USTEM), TU Wien, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria