1. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
2. Department of Materials Science and Engineering SURVICE Engineering Supporting the Army Research Lab, Impact Physics Branch Northwestern University Evanston IL 60208 USA
3. Materials and Manufacturing Directorate Air Force Research Laboratory Wright Patterson AFB OH 45433 USA
4. Department of Chemistry Department of Electrical and Computer Engineering Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA