1. Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan
2. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
3. Department of Physics, National Sun Yet-Sun University, Kaohsiung 80424, Taiwan
4. Nano Electrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
5. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701401, Taiwan
6. National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan
7. NanoElectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan