1. Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2. Department of Bioengineering, School of
Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
3. Bragg Institute, Australian Nuclear
Science and Technology Organization, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
4. Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yuseong-gu, Daejeon 305-353, Korea
5. Institute for Solid
State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Tokyo, Chiba 277-8581, Japan