1. Faculty of Electrical-Electronic
Engineering, University of Transport and Communications, No. 3,
Cau Giay Street, Dong Da, Hanoi Vietnam
2. Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
3. Division
of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
4. Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
5. Faculty of Science and Technology, Meijo University, SENTAN, Japan Science and Technology Agency (JST), Nagoya, Aichi 468-8502, Japan