1. Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109-1055, United States
2. Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040, United States
3. Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
4. Department of Biophysics, University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109-1055, United States
5. Program in Applied Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040, United States
6. Department of Chemistry, University of Louisville, 2320 South Brook Street, Louisville, Kentucky 40292, United States