1. Intelligent Sensors Research Section, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno, Yuseong-gu, Daejeon 34129, Republic of Korea
2. Department of Advanced Materials and Device Engineering, University of Science and Technology (UST), 217 Gajeongno, Yuseong-gu, Daejeon 34113, Republic of Korea
3. Department of Mechanical Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
4. Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
5. Department of Materials Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080, United States