1. Department of Chemistry, University of California, Berkeley, California 94720, United States
2. Miller Institute for Basic Research in Science, University of California, Berkeley, California 94720, United States
3. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
5. Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
6. Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
7. Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
8. Kavli Energy NanoScience Institute, Berkeley, California 94720, United States