Dr. Hyunjae Lee Profile

Dr. Hyunjae Lee

at Seoul National Univ

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Publications (2)

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Proceedings Article | 27 September 2016 Paper

Soft bioelectronics using nanomaterials

Hyunjae Lee, Dae-Hyeong Kim

Proceedings Volume 9945, 994502 (2016) https://doi.org/10.1117/12.2235267

KEYWORDS: Medicine, Nanomaterials, Tissues, Sensors, Sensors, Graphene, Electronics, Skin, Gold, Electrodes, Tumors

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Recently, soft bioelectronics has attracted significant attention because of its potential applications in biointegrated healthcare devices and minimally invasive surgical tools. Mechanical mismatch between conventional electronic/optoelectronic devices and soft human tissues/organs, however, causes many challenges in materials and device designs of bio-integrated devices. Intrinsically soft hybrid materials comprising twodimensional nanomaterials are utilized to solve these issues. In this paper, we describe soft bioelectronic devices based on graphene synthesized by a chemical vapor deposition process. These devices have unique advantages over rigid electronics, particularly in biomedical applications. The functionalized graphene is hybridized with other nanomaterials and fabricated into high-performance sensors and actuators toward wearable and minimally invasive healthcare devices. Integrated bioelectronic systems constructed using these devices solve pending issues in clinical medicine while providing new opportunities in personalized healthcare.

Proceedings Article | 17 May 2016 Paper

Flexible and stretchable electronics for wearable healthcare devices and minimally invasive surgical tools

Dae-Hyeong Kim, Mincheol Lee, Hyunjae Lee

Proceedings Volume 9836, 98361E (2016) https://doi.org/10.1117/12.2220147

KEYWORDS: Electronics, Tumors, Tissues, Nanoparticles, Heart, Gold, Endoscopes, Sensors, Data storage, Medicine

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Recent advances in soft electronics have attracted great attention, largely due to their potential applications in personalized, bio-integrated healthcare devices. The mechanical mismatch between conventional electronic/optoelectronic devices and soft human tissues/organs have presented many challenges, such as the low signalto- noise ratio of biosensors because of the incomplete integration of rigid devices with the body, inflammation and excessive immune responses of implanted stiff devices originated from friction and their foreign nature to biotic systems, and the considerable discomfort and consequent stress experienced by users when wearing/implanting these devices. Ultra-flexible and stretchable electronic devices are being highlighted due to their low system modulus and the intrinsic system-level softness that are important to solve these issues. Here, we describe our unique strategies for the nanomaterial synthesis and fabrication, their seamless assembly and integration, and the design and development of corresponding wearable healthcare devices and minimally invasive surgical tools. These bioelectronic systems fully utilize recent breakthroughs in unconventional soft electronics based on nanomaterials to address unsolved issues in clinical medicine and to provide new opportunities in the personalized healthcare.

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