a
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Japan
E-mail: uyama@chem.eng.osaka-u.ac.jp
;
Fax: +81-6-6879-7367
;
Tel: +81-6-6879-7364
b
Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, India
c
Environmental Technology Research Division, Osaka Municipal Technical Research Institute, 1-6-50 Morinomiya, Joto-ku, Japan