Issue 9, 2015
From the journal:

Energy & Environmental Science

Self-powered deep brain stimulation via a flexible PIMNT energy harvester†

Geon-Tae Hwang,‡a   Youngsoo Kim,‡bc   Jeong-Ho Lee,d   SeKwon Oh,a   Chang Kyu Jeong,a   Dae Yong Park,a   Jungho Ryu,e   HyukSang Kwon,a   Sang-Goo Lee,d   Boyoung Joung,f   Daesoo Kim*b  and  Keon Jae Lee*a  

* Corresponding authors

a Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
E-mail: keonlee@kaist.ac.kr

b Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
E-mail: daesoo@kaist.ac.kr

c Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea

d iBULe Photonics Co., Ltd., 145 Gaetbeol-ro, Yeonsu-gu, Incheon, Republic of Korea

e Functional Ceramics Group, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Seongsan-gu, Changwon, Gyeongnam 642-831, Republic of Korea

f Department of Internal Medicine, Yonsei University College of Medicine, Severance Hospital, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea

Abstract

Deep brain stimulation (DBS) is widely used for neural prosthetics and brain–computer interfacing. Thus far in vivo implantation of a battery has been a prerequisite to supply the necessary power. Although flexible energy harvesters have recently emerged as alternatives to batteries, they generate insufficient energy for operating brain stimulation. Herein, we report a high performance flexible piezoelectric energy harvester by enabling self-powered DBS in mice. This device adopts an indium modified crystalline Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIMNT) thin film on a plastic substrate to transform tiny mechanical motions to electricity. With slight bending, it generates an extremely high current reaching 0.57 mA, which satisfies the high threshold current for real-time DBS of the motor cortex and thereby could efficiently induce forearm movements in mice. The PIMNT based flexible energy harvester could open a new avenue for future in vivo healthcare technology using self-powered biomedical devices.

Graphical abstract: Self-powered deep brain stimulation via a flexible PIMNT energy harvester

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Article information

DOI
https://doi.org/10.1039/C5EE01593F
Article type
Paper
Submitted
22 May 2015
Accepted
17 Jun 2015
First published
17 Jun 2015

Energy Environ. Sci., 2015,8, 2677-2684

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Self-powered deep brain stimulation via a flexible PIMNT energy harvester

G. Hwang, Y. Kim, J. Lee, S. Oh, C. K. Jeong, D. Y. Park, J. Ryu, H. Kwon, S. Lee, B. Joung, D. Kim and K. J. Lee, Energy Environ. Sci., 2015, 8, 2677 DOI: 10.1039/C5EE01593F

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