1. Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin, Gyeonggi-do 17104, Korea
2. NCD Co. Ltd., Daejeon 34015, Korea
3. ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
4. Center for Analysis & Evaluation, National Nano Fab Center, Daejeon, 34141, Korea