1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
2. Sendai 980-8577
3. Japan
4. Fuel Cell Materials Group, Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5
5. Ibaraki 305-8565
6. Research Institute for Electronic Science, Hokkaido University
7. Sapporo 001-0021
8. Kawazoe Frontier Technologies Corporation
9. Yokohama 247-0014