A reversible gel-free electrode for continuous noninvasive electrophysiological signal monitoring

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Qing Liu
  • Jie Zhou
  • Liangtao Yang
  • Jiajia Xie
  • Chenhui Guo
  • Zimo Li
  • Jun Qi
  • Zhilin Zhang
  • Hui Yang
  • Jinglong Wu
  • Yi Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)8866-8875
Journal / PublicationJournal of Materials Chemistry C
Volume11
Issue number26
Online published22 May 2023
Publication statusPublished - 14 Jul 2023

Abstract

Continuous and accurate acquisition of electrophysiological signals is critical in health monitoring and disease diagnosis. However, degradation of electrophysiological electrodes can occur during long-term and continuous monitoring, leading to poor signal quality. Herein, we report a reversible and continuously monitored gel-free sponge electrode, which was prepared by vacuuming melamine resin sponge (MS) and an aqueous solution consisting of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), poly(vinyl alcohol) (PVA), and ethylene glycol (EG). The electrode exhibits a low contact impedance of 3.5 kΩ and excellent mechanical stability with 10 000 cycles of compression. Additionally, the electrode possesses a long shelf life and the ability to recover its initial electrical performance. Therefore, they enable continuous surface electromyography (sEMG) signal monitoring for 8 hours and have an excellent durability of up to 6 months. The signal-to-noise ratio (SNR) of this gel-free sponge electrode (9.82 dB) is higher than that of the commercial gel electrode (7.92 dB). Finally, we verified that these achieved dry or semi-dry electrodes can accurately detect biopotential signals, including electrocardiogram (ECG), electroencephalogram (EEG), and electrooculogram (EOG). This study provides a pathway to design a reversible, long-lasting, high-quality gel-free electrode for electrophysiological signal monitoring. © The Royal Society of Chemistry 2023

Research Area(s)

  • PEDOTPSS, POLYMER, SOLVENT, SURFACE

Citation Format(s)

A reversible gel-free electrode for continuous noninvasive electrophysiological signal monitoring. / Liu, Qing; Zhou, Jie; Yang, Liangtao et al.
In: Journal of Materials Chemistry C, Vol. 11, No. 26, 14.07.2023, p. 8866-8875.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review