期刊
NATURE BIOMEDICAL ENGINEERING
卷 3, 期 1, 页码 58-68出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41551-018-0335-6
关键词
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资金
- Bio-X Interdisciplinary Initiatives Seed Grant
- BOE Technology Group Co., Ltd.
- National Science Foundation [ECCS-1542152]
- National Science Scholarship (A*STAR, Singapore)
- NIH NRSA F32 postdoctoral fellowship
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Life Science Research Foundation fellowship
- Gordon and Betty Moore Foundation
Narrowing the mechanical mismatch between tissue and implantable microelectronics is essential for reducing immune responses and for accommodating body movement. However, the design of implantable soft electronics (on the order of 10 kPa in modulus) remains a challenge because of the limited availability of suitable electronic materials. Here, we report electrically conductive hydrogel-based elastic microelectronics with Young's modulus values in the kilopascal range. The system consists of a highly conductive soft hydrogel as a conductor and an elastic fluorinated photoresist as the passivation insulation layer. Owing to the high volumetric capacitance and the passivation layer of the hydrogel, electrode arrays of the thin-film hydrogel 'elastronics', 20 mu m in feature size, show a significantly reduced interfacial impedance with tissue, a current-injection density that is similar to 30 times higher than that of platinum electrodes, and stable electrical performance under strain. We demonstrate the use of the soft elastronic arrays for localized low-voltage electrical stimulation of the sciatic nerve in live mice.
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