1. National Synchrotron Radiation Research Center, Science-based Industrial Park, Hsinchu 300, Taiwan
2. Institute of Materials Science and Engineering, National Sun Yat-sen University, Kaohsiung 824, Taiwan
3. Department of Materials Science and Engineering, National Dong Hwa University, Hualien 974, Taiwan
4. Department of Chemistry, Tunghai University, Taichung, 407, Taiwan
5. Department of Civil Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
6. Department of Chemical Engineering, National Chung Cheng University, Chiayi 621, Taiwan
7. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan