1. Carbon Nanotube Project, Japan Science and Technology Corporation, c/o NEC, 34 Miyukigaoka, Tsukuba 305-8501, Japan, Department of Protein Engineering, Cancer Institute, Kami-Ikebukuro, Toshima, Tokyo 170-8455, Japan, Department of Physics, Meijo University, Tenpaku-ku, Nagoya 468-8502, Japan, and NEC Corporation, 34 Miyukigaoka, Tsukuba 305-8501, Japan