Affiliation: | 1. Macromolecules Group, Organic Nanomaterials Center, National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047 (Japan), Fax: (+81)?29‐859‐2101;2. Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi‐ku, Fukuoka 819‐0395 (Japan), Fax: (+81)?92‐802‐6990;3. Department of Materials Science and Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba, Ibaraki 305‐8571 (Japan) |