1. Department of Bioengineering, University of California, Riverside, California 92521, United States
2. Department of Chemistry, University of California, Riverside, California 92521, United States
3. Department of Biochemistry, University of California, Riverside, California 92521, United States
4. Department of Biology, University of California, Riverside, California 92521, United States
5. Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden
6. Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden
7. Materials Science and Engineering Program, University of California, Riverside, California 92521, United States