1. Electronics Science and Technology Division, Code 6800 U.S. Naval Research Laboratory 4555 Overlook Ave. S.W. Washington DC 20375 USA
2. Center for Bio/Molecular Science and Engineering, Code 6900 U.S. Naval Research Laboratory 4555 Overlook Ave. S.W. Washington DC 20375 USA
3. Materials Science and Technology Division, Code 6300 U.S. Naval Research Laboratory 4555 Overlook Ave. S.W. Washington DC 20375 USA
4. College of Science George Mason University Fairfax Virginia 22030 USA