1. School of Physics, Trinity College Dublin, Dublin 2, Ireland
2. Advanced Microscopy Laboratory, Centre for Research on Adaptive Nanostructures and Nanodevices, Dublin 2, Ireland
3. Department of Materials, University of Oxford, Oxford, UK
4. Department of Physics, University of Warwick, Coventry, UK
5. SuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury, UK
6. University of Bristol, Bristol, UK
7. HREM Research, Tokyo, Japan
8. School of Materials, University of Manchester, Manchester, UK