1. Center for Environmental Implications of Nanotechnology University of California, Los Angeles Los Angeles CA 90095‐7227 USA
2. Institute of the Environment and Sustainability University of California, Los Angeles Los Angeles CA 90095‐1496 USA
3. Optical Sciences Division Code 5611 U.S. Naval Research Laboratory Washington DC 20375 USA
4. KeyW Corporation Hanover MD 21076 USA
5. Center for Biomolecular Science and Engineering, Code 6900 U.S. Naval Research Laboratory Washington DC 20375 USA
6. Department of Chemical and Biomolecular Engineering University of California, Los Angeles Los Angeles CA 90095 USA