1. Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
2. UES, Inc., Dayton, Ohio 45432, United States
3. DuPont Central Research & Development, E.I. DuPont de Nemours & Co., Inc., Wilmington, Delaware 19880, United States
4. Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
5. Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States