1. Department of Chemistry & Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
2. Department of Molecular, Cell, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106, United States
3. Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106, United States
4. Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
5. Department of Physics, University of California Santa Barbara, Santa Barbara, California 93106, United States