1. Department of Materials Science and EngineeringUniversity of California, Los Angeles Los Angeles CA 90095 USA
2. Adroit Materials, Inc. Apex NC 27518 USA
3. Department of Material Science and EngineeringNorth Carolina State University Raleigh NC 27606 USA
4. Institute of High Pressure PhysicsPolish Academy of Sciences Warsaw 01-142 Poland
5. Center for Nanoscale MaterialsArgonne National Laboratory Lemont IL 60439 USA