1. Department of Physics & Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. Nano/Bio Interface Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104, United States
5. Department of Molecular and Cellular Pharmacology, University of Miami, Miami, Florida 33101, United States
6. Department of Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
7. Nanosense, Inc., Redwood City, California 94063, United States
8. Princeton Neuroscience Institute, Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, United States
9. Evolved Machines, LLC, Palo Alto,California 94301, United States