1. Contribution from the Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 Japan, and MIRAI Project, Association of Super-Advanced Electronics Technology (ASET), AIST Tsukuba West 7, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 Japan