1. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan, R.O.C.
2. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan, R.O.C.
3. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
4. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, P R China