1. Fullerene Development Group,
Performance Products Division, Mitsubishi Chemical Corporation, 1-1 Kurosakishiroishi, Yahatanishi-ku, Kitakyushu 806-0004, Japan
2. Engineering and Development
Center, Frontier Carbon Corporation, 1-1
Kurosakishiroishi, Yahatanishi-ku, Kitakyushu 806-0004, Japan
3. Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan