1. Department of Chemical and Biomolecular Engineering (BK-21 plus); National Laboratory for Organic Opto-Electronic Materials/Korea Advanced Institute of Science and Technology; Daejeon 305-701 South Korea
2. Soft Innovative Materials Research Center; Korea Institute of Science and Technology; Eunha-ri San 101, Bongdong-eup Wanju-gun Jeollabuk-do 565-905 South Korea
3. Department ent of Nano-structured Materials Research; Korea Advanced Institute of Science and Technology; Daejeon 305-701 South Korea
4. Division of Advanced Materials; Korea Research Institute of Chemical Technology (KRICT); 141 Gajeongro Yuseong, Daejeon 305-600 South Korea
5. Beam Engineering for Advanced Measurements Co; 809 South Orlando Ave, Suite I Winter Park FL 32789 USA
6. Department of Electronic Engineering; Hanyang University; Seoul 133-791 South Korea