1. Department of Biomedical Engineering, University of California Irvine, Irvine, California 92697, United States
2. Department of Materials Science and Engineering, University of California Irvine, Irvine, California 92697, United States
3. Laboratory for Fluorescence Dynamics, University of California Irvine, Irvine, California 92697, United States
4. Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, California 92697, United States
5. Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, California 92697, United States