1. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
2. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
3. Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10655, Taiwan
4. Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
5. Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan