1. Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
2. HRL Laboratories LLC, Malibu, California 90265, United States
3. Argonne National Laboratory, Lemont, Illinois 60439, United States
4. James Franck Institute, Chicago, Illinois 60637, United States
5. Pritzker School of Molecular Engineering, Chicago, Illinois 60637, United States
6. Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States