1. Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
2. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
3. Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan
4. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
5. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
6. Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan