Affiliation: | 1. School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, South Korea;2. SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, South Korea;3. School of Electrical Engineering, Korea University, Seoul, South Korea;4. Division of Materials Science and Engineering, Hanyang University, Seoul, South Korea |