1. Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
2. Department of Chemistry, University of California, Berkeley, California 94720, United States
3. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. Kavli Energy Nanoscience Institute at Berkeley, Berkeley, California 94720, United States
5. Department of Physics, University of Illinois, Urbana, Illinois 61801, United States
6. Illinois Quantum Information Science and Technology Center, University of Illinois, Urbana, Illinois 61801, United States