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Adv. Mater., Oct 26 2023, | https://doi.org/10.1002/adma.202307194 High-Performing and Capacitive-Matched Triboelectric Implants Driven by Ultrasound

Young-Jun Kim¹, Jiho Lee ², Joon-Ha Hwang ^1,3, Youngwook Chung ^1,3, Byung-Joon Park ⁴, Junho Kim ⁵, So-Hee Kim⁴, Junseung Mun ², Hong-Joon Yoon⁶, Sung-Min Park ^2,5,7, Sang-Woo Kim ^4,8

¹School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.

²Department of Convergence IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.

³Research and Development Center, Energymining Co., Ltd., Suwon, 16226, Republic of Korea.

⁴Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, Republic of Korea.

⁵School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.

⁶Department of Electronic Engineering, Gachon University, Seongnam, 13120, Republic of Korea.

⁷Department of Electrical Engineering, Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.

8Center for Human-Oriented Triboelectric Energy Harvesting, Yonsei University, Seoul, 03722, Republic of Korea.

Y.-J.K., J.L., J.-H.H. contributed equally to this work.

CORRESPONDING AUTHORS : Jiho Lee, Sung-Min Park, Sang-Woo Kim

Abstract

In implantable bioelectronics, which aim for semipermanent use of devices, biosafe energy sources and packaging materials to protect devices are essential elements. However, research so far has been conducted in a direction where they cannot coexist. Here, the development of capacitance-matched triboelectric implants driven is reported by ultrasound under 500 mW cm ^-2 safe intensity and realize a battery-free, miniatured, and wireless neurostimulator with full titanium (Ti) packaging. The triboelectric implant with high dielectric composite, which has ultralow output impedance, can efficiently deliver sufficient power to generate the stimulation pulse without an energy-storing battery, despite ultrasound attenuation due to the Ti, and has the highest energy transmission efficiency among those reported so far. In vivo study using a rat model demonstrated that the proposed device system is an effective solution for relieving urinary symptoms. These achievements provide a significant step toward permanently implantable devices for controlling human organs and treating various diseases.

논문정보

형식Research article
게재일2023년 10월 (BRIC 등록일 2024-03-07)
연구진국내 연구진
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