1. Department of Materials Science & Engineering, University of California, Berkeley, Berkeley, California 94720-7118, United States
2. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439,
United States
3. National Center
for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
4. Department
of Chemistry, University of California, Berkeley, Berkeley, California
94720-7118, United States
5. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States