1. Department of Chemistry, University of California, Berkeley, California 94720, United States
2. California Research Alliance (CARA) by BASF, Berkeley, California 94720, United States
3. Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
4. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. BASF SE, Ludwigshafen am Rhein 67056, Germany
6. Kavli Energy NanoScience Institute, Berkeley, California 94720, United States