1. School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
2. Singapore Institute of Manufacturing Technology (SIMTech), A*STAR, 2 Fusionopolis Way, #08-04, Innovis, 138634, Singapore
3. Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea
4. Low Energy Electronic Systems (LEES), Singapore-MIT Alliance for Research and Technology (SMART), 138602, Singapore