1. Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
2. Computational Science Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
3. Department of Chemistry, University of California, Berkeley, California 94720, United States
4. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
5. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States