1. Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
2. Nanomaterials Science and Engineering, University of Science and Technology, 176 Gajung-dong, 217 Gajungro,
Yuseong-gu, Daejeon 305-350, Republic of Korea
3. R & D Center, Chang Sung Corporation, 11B-9L, Namdong Industrial Area 320, Seunggicheon-ro, Namdong-gu, Incheon 405-846, Republic of Korea