1. National Institute for Advanced Interdisciplinary Research, Cell Tissue Module Group, 1-1-4 Higashi, Tsukuba-shi, Ibaraki 305-8562, Japan, Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan, and Otsuka Electronics Co., Ltd., 3-26-3, Shodai-Tajika, Hirakata, Osaka 573-1132, Japan