1. University of Ulm, Central Facility of Electron Microscopy, Albert-Einstein Allee 11, D-89081, Ulm, Germany
2. Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
3. Canadian Centre for Electron Microscopy, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
4. Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
5. Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany