1. Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8573, Japan
2. Surface and Interface Kinetics Group, National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, Japan
3. Carbon Composite Materials Group, Research Center for Functional Materials, National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki, 305-0044, Japan
4. Fullerene Engineering Group, National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan