1. Materials Research Laboratory, HITACHI, Ltd., 7-1-1, Omika-cho, Hitachi 319-1292, Japan, Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan, International Innovation Center, Kyoto University, Nishikyo-ku, Kyoto, 606-8501, Japan, and Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan