1. Department of Material Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
2. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
3. Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
4. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan