1. Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
2. Department of Chemical Engineering National Taiwan University of Science and Technology Taipei 106335 Taiwan
3. National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
4. Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
5. International Research Frontiers Initiative Institute of Innovative Research Tokyo Institute of Technology Kanagawa 226–8503 Japan