1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
2. Department of Physics, University of California, Berkeley, Berkeley, California 94720, United States
3. Institute of Materials Science and Department of Chemistry, University of Connecticut, Storrs, Connecticut 06268, United States
4. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K.
6. Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Villeurbanne 69626, France
7. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States