1. Department of Chemistry, Rice University, Houston, Texas 77005, United States
2. Army Research Laboratory-South, U.S. Army DEVCOM, Houston, Texas 77005, United States
3. Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States
4. Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
5. Department of Chemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
6. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
7. Department of Radiology, Molecular Imaging Program at Stanford (MIPS), Stanford University School of Medicine, Stanford, California 94305, United States
8. Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
9. Department of Physics, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
10. Center for Biophysics and Quantitative Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
11. Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States