1. Department of Electrical Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
2. Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
3. R&D Center, Maccon IT Inc., Bucheon 14441, Republic of Korea
4. Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
5. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
6. Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea