1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
2. Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo, 671-2280, Japan
3. Toray Research Center, Inc., 3-7 Sonoyama 3-chome, Otsu, Shiga, 520-8567, Japan