1. Department of Chemistry, Stanford University, Stanford, California 94305, United States
2. SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Science, Menlo Park, California 94025, United States
3. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
4. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Department of Physics and Astronomy, University of California, Davis, California 95616, United States
6. Department of Energy Science & Engineering, Stanford University, Stanford, California 94305, United States