1. Research Center for Exotic Nanocarbons, Shinshu University, Nagano 380-8553, Japan
2. Material Science, Department of Chemistry, Graduate School of Science and Technology, Chiba University, Chiba 263-8522 Japan
3. Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan
4. Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan