1. National Institute for Materials Science (NIMS); Tsukuba Ibaraki 305-0044 Japan
2. RIKEN, 2-1 Hirosawa, Wako; Saitama 351-0198 Japan
3. Okayama University, Kita-ku; Okayama 700-8530 Japan
4. Colloidal Ink Co., Ltd., Sojya-shi; Okayama 719-1121 Japan