1. Polymer Chemistry Laboratory, College of Engineering, Kyungil University, Gyeongsan, Gyeongsangbuk-do, Korea
2. Department of Chemistry Education, Pusan National University, Pusan, Korea
3. Department of Chemistry and Center for Display Res., The Catholic University of Korea, Bucheon, Korea
4. Division of Image and Information Engineering, Pukyong National University, Busan, Korea