1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Keelung Rd., Sec.4, Da’an Dist., Taipei 10607, Taiwan
2. Department of Applied Chemistry, Tokyo Institute of Technology, 2 Chome-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan
3. National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan