Transducers in Bioengineering & Energy Harvesting

In the new era of abundant-data computing, enormous quantities of data will be collected by vast networks of ubiquitous transducers (sensors and actuators). As transducer networks become more complex, individual transducers need to be designed to support various modes of operation and interfaces. Some applications require additional fault-tolerance and distributed computing, and such high-level functionality is achieved by combining sensing elements with analog interface circuits and communication modules. These devices are rapidly making their way into healthcare monitoring, high-speed machinery, and automotive applications. I plan to integrate novel nanomaterials with unconventional attributes into transducers to bring about new possibilities in the field of smart transducers. For example, fully transparent, wearable devices for health care monitoring will be difficult to design by only using conventional silicon, oxides, and metals.

Current applications of interest include:

• Mechanically Compliant Implantable Neurodevices

• Sensors for Space and Harsh radiation environment

• Wearable Energy Scavengers

Related Publications

• Seunghyun Lee, Sanghoek Kim, ‘‘Power Link Optimization for a Neurostimulator in Nasal Cavity" , submitted

• Zhang, Weixia, Sudarat Lee, Kelly L. McNear, Ting Fung Chung, Seunghyun Lee, Kyunghoon Lee, Scott A. Crist et al. “Use of graphene as protection film in biological environments.” Scientific reports 4.

• Seunghyun Lee, Alvin Tang, James P. McVittie, H. -S. Philip Wong, ‘‘NEM relays using 2-dimensional nanomaterials for low energy contacts", Energy Efficient Electronic Systems, pp. 1,2,

• Seunghyun Lee, Kyunghoon Lee, Chang-Hua Liu, Girish S. Kulkarni, and Zhaohui Zhong, ‘‘Flexible and Transparent All-Graphene Circuits for Quaternary Digital Modulations", Nature Communications, 3, 1018.

• Seunghyun Lee, Kyunghoon Lee, Chang Hua Liu and Zhaohui Zhong, ‘‘Homogeneous bilayer graphene film based flexible transparent conductor", Nanoscale, 4, 639-644,

• Seunghyun Lee, Seow Yuen Yee, Ali Besharatian, Hanseup Kim, and Khalil Najafi, ‘‘Adaptive gas pumping by controlled timing of active microvalves in peristaltic micropumps", in IEEE Solid-State Sensors, Actuators and Microsystems, Denver, Colorado

• Hanseup Kim, Seunghyun Lee, Khalil Najafi, “High force liquid gap electrostatic hydraulic micro actuator”, The 11th International Conference on Miniaturized Systems for Chemistry and Life Sciences (μTAS), pp. 1735-1737.