1. Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea
2. Department of Bioengineering, University of California, Berkeley, Berkeley, California 94720, USA
3. Berkeley Sensor and Actuator Center, University of California, Berkeley, Berkeley, California 94720, USA
4. Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, California 94720, USA
5. Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, South Korea
6. Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, South Korea
7. Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, South Korea
8. Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, South Korea
9. Nano Systems Institute, Seoul National University, Seoul 08826, South Korea