1. Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C., 20375, United States
2. Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
3. Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
4. Jacobs Corporation, Hanover, Maryland 21076, United States
5. Fischell Department of Bioengineering, University of Maryland College Park, College Park, Maryland 20742, United States
6. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
7. International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States