1. Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522,
Japan
2. Research Center for
Exotic Nanocarbons, Shinshu University,
4-17-1 Wakasato, Nagano 380-8553,
Japan
3. Department of Chemical
Engineering, Kyoto University, Nishikyo-ku,
Kyoto 615-8510, Japan
4. Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi Tsukuba, Ibaraki 305-8565, Japan
5. Faculty
of Textile Science and
Technology, Shinshu University, 3-15-1
Tokida, Ueda 386-8567, Japan
6. Chemical Analysis Center, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522,
Japan