1. Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
2. Fullerene Engineering Group, Materials Processing Unit, Advanced Key Technologies Division, National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan
3. Corporate Research and Development, IHI Corporation, 1 Shin-Nakahara-cho, Isogo-ku, Yokohama 235-8501, Japan