1. Chemistry Graduate Group, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
2. Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
3. Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
4. Department of Biomedical Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, United States