1. Institute of Chemistry; Academia Sinica; Nankang Taipei 11529 Taiwan
2. Department of Materials Science and Engineering; National Taiwan University; Da'an Taipei 10617 Taiwan
3. NTU Center for Condensed Matter Sciences; National Taiwan University; Da'an Taipei 10617 Taiwan
4. Department of Chemistry; National Central University; Taoyuan 32001 Taiwan
5. Institute of Polymer Science and Engineering; National Taiwan University; Taipei 10617 Taiwan