1. Department of Materials Science
and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
2. Department of Chemistry, Institute
of Nanoscience and Engineering Technology, University of Massachusetts, Lowell, Massachusetts 01854, United
States
3. Department of Physics, Ohio State University, Columbus, Ohio 43210, United
States
4. AFRL/RXBN, Air Force Research Laboratory, Wright-Patterson Air Force Base,
Dayton, Ohio 45433, United States