1. Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550
2. Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397
3. Research Center for Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8602
4. Department of Basic Science, University of Tokyo, 3-8-1 Meguro-ku, Tokyo 152-8902