1. Department of Physics & Astronomy and California NanoSystems Institute, University of California , Los Angeles, CA , USA
2. National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, CA , USA
3. Department of Materials, University of Oxford , Oxford , UK
4. Electron Physical Science Imaging Centre (ePSIC) , Diamond Light Source, Didcot , UK
5. The Rosalind Franklin Institute , Harwell Campus, Didcot , UK