1. Department of Chemical Engineering, University of California, Davis, California 95616, United States
2. Department of Physics, University of Washington, Seattle, Washington 98195, United States
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
4. University of California Irvine, Irvine, California 92697, United States
5. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
6. Department of Materials Science and Engineering, University of California, Davis, California 95616, United States
7. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China