1. Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095-1569, United States
2. Department of Mechanical & Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
3. Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
4. Department of Earth, Planetary, and Space Sciences, UCLA, Los Angeles, California 90095 United States
5. California NanoSystems Institute (CNSI), UCLA, Los Angeles, California 90095 United States
6. Department of Materials Science and Engineering, UCLA, Los Angeles, California 90095, United States