1. Materials Science and Engineering, University of California at Berkeley , Berkeley, CA , United States
2. National Center for Electron Microscopy , Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, CA , United States
3. Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, NM , United States
4. Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, WA , United States