1. The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Institute
of Physics, University of Augsburg, Augsburg 86135, Germany
4. College
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
5. Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
6. Department
of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
7. Kavli Energy NanoScience Institute, Berkeley, California 94720, United States