1. Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
2. Electronic Science and Technology Division, Code 6800, U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
3. Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States
4. Quantum Materials Center, George Mason University, Fairfax, Virginia 22030, United States
5. Micron School of Materials Science and Engineering and the Computer Science Department, Boise State University, Boise, Idaho 83706, United States
6. Department of Nanoengineering, The Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University, Greensboro, North Carolina 27401, United States
7. Department of Electrical and Computer Engineering, Boise State University, Boise, Idaho 83706, United States