1. Department of Physics, The United States Naval Academy, Annapolis, Maryland 21402, United States
2. Department of Mechanical and Aerospace Engineering, The United States Naval Academy, Annapolis, Maryland 21402, United States
3. Department of Chemistry, The United States Naval Academy, Annapolis, Maryland 21402, United States
4. Department of Mechanical and Aerospace Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
5. US Army Research Laboratory, Adelphi, Maryland 20783, United States
6. Materials Science and Technology Division, Naval Research Labs, Washington, D.C., District of Columbia 20375, United States