1. Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
2. Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States
3. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
4. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
6. Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
7. Robert Bosch LLC, Research and Technology Center, Cambridge, Massachusetts 02142, United States