1. Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
2. Material Development P/J, Semiconductor R&D Center, Samsung Electronics, Hwaseong-si, Gyeonggi-do 18448, Republic of Korea
3. Radiation Safety Management Division, Korea Atomic Energy Research Institute, Yuseong-gu, Daejeon 34057, Republic of Korea