1. Department of Organic
Materials and Fiber Engineering, Soongsil University, 369 Sangdo-Ro, Dongjak-Gu, Seoul 06978, Korea
2. Department of Information
Communication, Materials, and Chemistry Convergence Technology (BK-21
plus), Soongsil University, 369 Sangdo-Ro, Dongjak-Gu, Seoul 06978, Korea