1. Material Science Research Laboratory, Kao Corporation, 1334, Minato, Wakayama-shi, Wakayama 640-8580, Japan
2. Analytical Science Research Laboratory, Kao Corporation, 1334, Minato, Wakayama-shi, Wakayama 640-8580, Japan
3. Institute of Low Temperature Science, Hokkaido University, N19-W8, Kita-ku, Sapporo 060-0819, Japan