1. Department of Chemistry, Kavli Energy NanoScience Institute, University of California, Berkeley, Berkeley, California 94720, United States
2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
3. SSRL Materials Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
4. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
5. Department of Chemistry, Stanford University, Stanford, California 94305, United States