1. Material Research Center, Samsung Advanced
Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro
130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea
2. Department of Graphic Arts Information Engineering, College
of Engineering, Pukyong National University, 365 Sinseron-ro, Nam-gu, Busan 608-739, Korea
3. Department of Chemistry, Sungkyunkwan University Natural Science Campus, Seobu-ro 2066, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea