1. Department of Materials Science and Metallurgy, University of Cambridge, 22 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
2. Photon Science Institute, School of Physics and Astronomy, Alan Turing Building, University of Manchester, Manchester M13 9PL, United Kingdom
3. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, Leo-Brandt- Straße, D-52425 Jülich, Germany
4. Monash Centre for Electron Microscopy, Monash University, Clayton Campus, VIC 3800, Australia
5. Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY, United Kingdom