1. Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
2. Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States
3. Quantum Materials Center, George Mason University, Fairfax, Virginia 22030, United States
4. Fischell Department of Bioengineering, University of Maryland, College Park, College Park, Maryland 20742, United States