1. Materials and Manufacturing Directorate Air Force Research Laboratory Wright‐Patterson AFB OH 45433 USA
2. UES Inc. Beavercreek OH 45431 USA
3. Department of Chemistry Rice University Houston TX 77005 USA
4. Materials Science and Nano Engineering Rice University Houston TX 77005 USA
5. Department of Materials Science and Metallurgy University of Cambridge Cambridge CB3 0FS UK
6. Department of Earth Sciences University of Cambridge Cambridge CB2 3EQ UK