1. Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
2. UES, Inc., Beavercreek, Ohio 45432, United States
3. Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Department of Materials Science and Nanoengineering, Rice University, Houston, Texas 77005, United States
5. KBR, Dayton, Ohio 45431, United States
6. Department of Chemistry, Rice University, Houston, Texas 77005, United States