1. Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
2. Electronic Functional Macromolecules Group, National Institute for Materials Science, 1−1 Namiki, Tsukuba 305−0044, Japan
3. Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan