1. Global Zero Emission Research Center National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8569 Japan
2. Thermal Energy Conversion Research and Advancement Group Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena CA 91109-8099 USA
3. Materials Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
4. Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
5. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA