1. Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
2. National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
3. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
4. Institute of Materials Science and Engineering, National Central University, Taoyuan City 32001, Taiwan
5. Department of Physics, National Changhua University of Education, Changhua 50007, Taiwan
6. School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
7. Hierarchical Green-Energy Materials (Hi-GEM) Research Centre, National Cheng Kung University, Tainan 70101, Taiwan