1. Department of Material Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
2. Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
3. Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan
4. NTU−MST International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei 10617, Taiwan
5. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
6. Department of Material Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan
7. Department of Physics, National Taiwan University, Taipei 10617, Taiwan
8. Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan