1. Division of Applied ChemistryGraduate School of EngineeringOsaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
2. Present address: CNT-Application Research CenterNational Institute of Advanced Industrial Science and Technology (AIST) Central 5, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan