1. Department of Chemistry, College of Natural Sciences Seoul National University, Gwanakro-1, Seoul 151-747, Republic of Korea
2. Polymer Research Institute, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
3. Smart I/O Control Device Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, South Korea
4. SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nano Technology (HINT), Sungkyunkwan University, Suwon 440-746, Korea
5. Future Technology Research Center Corporate R&D, LG Chem Research Park, Daejeon 305-738, Korea
6. Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea
7. Electronic Materials & Device Research Center, Korea Electronics Technology Institute, Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-816, Korea
8. Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Eunha-ri san 101, Bongdong-eup, Wanju-gun, Jeollabukdo (or Jeonbuk) 565-905, Republic of Korea
9. School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea