1. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
3. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
5. NASA Ames Research Center, Moffett Field, California 94035, United States