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Open AccessArticle

Fabrication of Flexible Microneedle Array Electrodes for Wearable Bio-Signal Recording

by 1,†, 1,†, 1, 1, 1, 1, 2 and 1,*
1
Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Sun Yat-Sen University, Guangzhou 510006, China
2
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2018, 18(4), 1191; https://doi.org/10.3390/s18041191
Received: 15 March 2018 / Revised: 11 April 2018 / Accepted: 11 April 2018 / Published: 13 April 2018
(This article belongs to the Section Physical Sensors)
Laser-direct writing (LDW) and magneto-rheological drawing lithography (MRDL) have been proposed for the fabrication of a flexible microneedle array electrode (MAE) for wearable bio-signal monitoring. Conductive patterns were directly written onto the flexible polyethylene terephthalate (PET) substrate by LDW. The microneedle array was rapidly drawn and formed from the droplets of curable magnetorheological fluid with the assistance of an external magnetic field by MRDL. A flexible MAE can maintain a stable contact interface with curved human skin due to the flexibility of the PET substrate. Compared with Ag/AgCl electrodes and flexible dry electrodes (FDE), the electrode–skin interface impedance of flexible MAE was the minimum even after a 50-cycle bending test. Flexible MAE can record electromyography (EMG), electroencephalography (EEG) and static electrocardiography (ECG) signals with good fidelity. The main features of the dynamic ECG signal recorded by flexible MAE are the most distinguishable with the least moving artifacts. Flexible MAE is an attractive candidate electrode for wearable bio-signal monitoring. View Full-Text
Keywords: laser-direct writing; magneto-rheological drawing lithography; microneedle array; electrode; bio-signal laser-direct writing; magneto-rheological drawing lithography; microneedle array; electrode; bio-signal
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MDPI and ACS Style

Ren, L.; Xu, S.; Gao, J.; Lin, Z.; Chen, Z.; Liu, B.; Liang, L.; Jiang, L. Fabrication of Flexible Microneedle Array Electrodes for Wearable Bio-Signal Recording. Sensors 2018, 18, 1191. https://doi.org/10.3390/s18041191

AMA Style

Ren L, Xu S, Gao J, Lin Z, Chen Z, Liu B, Liang L, Jiang L. Fabrication of Flexible Microneedle Array Electrodes for Wearable Bio-Signal Recording. Sensors. 2018; 18(4):1191. https://doi.org/10.3390/s18041191

Chicago/Turabian Style

Ren, Lei; Xu, Shujia; Gao, Jie; Lin, Zi; Chen, Zhipeng; Liu, Bin; Liang, Liang; Jiang, Lelun. 2018. "Fabrication of Flexible Microneedle Array Electrodes for Wearable Bio-Signal Recording" Sensors 18, no. 4: 1191. https://doi.org/10.3390/s18041191

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