1. Department of Physics and Helsinki Institute of Physics, University of Helsinki, P.O. Box 43, FIN-00014 Helsinki, Finland
2. Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
3. Institute of Nanoscience and Materials of Aragon (INMA), Spanish National Research Council (CSIC), University of Zaragoza, 12 Calle de Pedro Cerbuna, 50009 Zaragoza, Spain
4. Laboratorio de Microscopias Avanzadas (LMA), University of Zaragoza, 12 Calle de Pedro Cerbuna, 50009 Zaragoza, Spain
5. Center for High-Resolution Electron Microscopy (CℏEM) School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
6. Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Cantoblanco, Madrid, Spain
7. Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland
8. CSC−IT Center for Science, P.O. Box 405, FI-02101 Espoo, Finland