1. Department of Chemistry and Bio-X, Stanford University, Stanford, California94305, United States
2. Department of Chemical Engineering, National Chung Cheng University, Chia-Yi62102, Taiwan
3. Department of Electrical Engineering, National Chung Cheng University, Chia-Yi62102, Taiwan
4. Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei10607, Taiwan
5. National Synchrotron Radiation Research Center, Hsinchu30076, Taiwan
6. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei10607, Taiwan
7. Institute of Materials Science and Engineering, National Central University, Taoyuan City32001, Taiwan
8. College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao, Shandong Province, 266590, P. R. China