1. Materials and Manufacturing DirectorateAir Force Research Laboratory Wright‐Patterson AFB OH 45433 USA
2. UES Inc. Beavercreek OH 45431 USA
3. Department of ChemistryRice University Houston TX 77005 USA
4. Materials Science and Nano EngineeringRice University Houston TX 77005 USA
5. Department of Materials Science and MetallurgyUniversity of Cambridge Cambridge CB3 0FS UK
6. Department of Earth SciencesUniversity of Cambridge Cambridge CB2 3EQ UK