1. Department of Materials Science and Chemistry; University of Hyogo; 2167 Shosha Himeji Hyogo 671-2280 Japan
2. Graduate Institute of Applied Science and Technology and Department of Chemical Engineering; National Taiwan University of Science and Technology; Taipei 10607 Taiwan
3. Department of Applied Chemistry, Graduate School of Engineering; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku, Sakai Osaka 599-8531 Japan
4. Department of Materials Engineering and Department of Bioengineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan