1. Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2201, Japan; Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan; and Department of Applied Physics and Chemistry, Fukui University of Technology, 6-3-1 Gakuen, Fukui 910-8505, Japan