1. Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
2. Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
3. Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA 96297, USA.
4. Materials & Structural Analysis, Thermo Fisher Scientific, Hillsboro, OR 97124, USA.
5. National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
6. Camborne School of Mines, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK.