1. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
2. Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
3. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, United States
4. Max-Planck-Institut für Eisenforschung, 40237 Düsseldorf, Germany
5. Central Facility for Electron Microscopy, RWTH Aachen University, 52074 Aachen, Germany
6. Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii 96822, United States
7. Department of Materials, Royal School of Mines, Imperial College London, London, SW7 2BP, U.K.
8. Department of Physics, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States