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High‑Performance flexible microneedle array as a Low‑Impedance Surface Biopotential Dry Electrode for Wearable Electrophysiological Recording and Polysomnography

引用

Nano-Micro Letters 2022年第8期14卷 142-163页

作者： Junshi Li Yundong Ma Dong Huang Zhongyan Wang Zhitong Zhang Yingjie Ren Mengyue Hong Yufeng Chen Tingyu Li Xiaoyi Shi Lu Cao Jiayan Zhang Bingli Jiao Junhua Liu Hongqiang Sun Zhihong Li National Key Laboratory of Science and Technology on Micro/Nano Fabrication School of Integrated CircuitsPeking UniversityBeijing 100871People’s Republic of China Peking University Sixth Hospital Peking University Institute of Mental HealthNHC Key Laboratory of Mental Health(Peking University)National Clinical Research Center for Mental Disorders(Peking University Sixth Hospital)Beijing 100191People’s Republic of China School of Electronics Peking UniversityBeijing 100871People’s Republic of China Hypnometry Microsystem Beijing 100871People’s Republic of China College of Engineering Peking UniversityBeijing 100871People’s Republic of China

microneedle array(MNA)electrodes are an effective solution to achieve high-quality surface biopotential recording without the coordination of conductive gel and are thus very suitable for long-term wearable *** schemes are limited by flexibility,biosafety,and manufacturing costs,which create large barriers for wider ***,we present a novel flexible MNA electrode that can simultaneously achieve flexibility of the substrate to fit a curved body surface,robustness of microneedles to penetrate the skin without fracture,and a simplified process to allow mass *** compatibility with wearable wireless systems and the short preparation time of the electrodes significantly improves the comfort and convenience of electrophysiological *** normalized electrode–skin contact impedance reaches 0.98 kΩcm^(2)at 1 kHz and 1.50 kΩcm^(2)at 10 Hz,a record low value compared to previous reports and approximately 1/250 of the standard *** morphology,biosafety,and electrical/mechanical properties are fully characterized,and wearable recordings with a high signal-to-noise ratio and low motion artifacts are *** first reported clinical study of microneedle electrodes for surface electrophysiological monitoring was conducted in tens of healthy and sleep-disordered subjects with 44 nights of recording(over 8 h per night),providing substantial evidence that the electrodes can be leveraged to substitute for clinical standard electrodes.

关键词： flexible microneedle array Dry electrode Low-impedance electrode–skin contact Wearable wireless electrophysiological recording Polysomnography

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