1. Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
2. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
3. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
4. Department of Materials Science and Engineering, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
5. California NanoSystems Institute (CNSI), University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA