Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147147
Title: A compliant ionic adhesive electrode with ultralow bioelectronic impedance
Authors: Pan, Liang
Cai, Pingqiang
Mei, Le
Cheng, Yuan
Zeng, Yi
Wang, Ming
Wang, Ting
Jiang, Ying
Ji, Baohua
Li, Dechang
Chen, Xiaodong
Keywords: Engineering::Materials::Organic/Polymer electronics
Issue Date: 2020
Source: Pan, L., Cai, P., Mei, L., Cheng, Y., Zeng, Y., Wang, M., Wang, T., Jiang, Y., Ji, B., Li, D. & Chen, X. (2020). A compliant ionic adhesive electrode with ultralow bioelectronic impedance. Advanced Materials, 32(38), e2003723-. https://dx.doi.org/10.1002/adma.202003723
Journal: Advanced Materials 
Abstract: Simultaneous implementation of high signal-to-noise ratio (SNR) but low crosstalk is of great importance for weak surface electromyography (sEMG) signals when precisely driving a prosthesis to perform sophisticated activities. However, due to gaps with the curved skin during muscle contraction, many electrodes have poor compliance with skin and suffer from high bioelectrical impedance. This causes serious noise and error in the signals, especially the signals from low-level muscle contractions. Here, the design of a compliant electrode based on an adhesive hydrogel, alginate-polyacrylamide (Alg-PAAm) is reported, which eliminates those large gaps through the strong electrostatic interaction and abundant hydrogen bond with the skin. The obtained compliant electrode, having an ultralow bioelectrical impedance of ≈20 kΩ, can monitor even 2.1% maximal voluntary contraction (MVC) of muscle. Furthermore, benefiting from the high SNR of >5:1 at low-level MVC, the crosstalk from irrelevant muscle is minimized through reducing the electrode size. Finally, a prosthesis is successfully demonstrated to precisely grasp a needle based on a 9 mm2 Alg-PAAm compliant electrode. The strategy to design such compliant electrodes provides the potential for improving the quality of dynamically weak sEMG signals to precisely control prosthesis in performing purposefully dexterous activity.
URI: https://hdl.handle.net/10356/147147
ISSN: 0935-9648
DOI: 10.1002/adma.202003723
Rights: This is the peer reviewed version of the following article: Pan, L., Cai, P., Mei, L., Cheng, Y., Zeng, Y., Wang, M., Wang, T., Jiang, Y., Ji, B., Li, D. & Chen, X. (2020). A compliant ionic adhesive electrode with ultralow bioelectronic impedance. Advanced Materials, 32(38), e2003723-. https://dx.doi.org/10.1002/adma.202003723, which has been published in final form at https://doi.org/10.1002/adma.202003723. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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