1. Department of Nanostructured and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima 890-0065, Japan; Tsukuba Research Laboratory, NOF Corporation, 5-10 Tokodai, Tsukuba, Ibaraki 300-2635, Japan; and Department of Molecular Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Japan