1. Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
3. Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
4. Department of Physics, University of Washington, Seattle, Washington 98195, United States
5. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States