1. Institute of Materials Science and Engineering, and Department of Materials & Mineral Resources Engineering, National Taipei University of Technology, Box 2761, No. 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, Taiwan
2. Chemical Systems Research Division, National Chung-Shan Institute of Science and Technology, No. 210, Shigu Rd., Longtan Dist., Taoyuan City 32546, Taiwan