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A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure

Flexible electrodes are extensively used to detect signals in electrocardiography, electroencephalography, electro-ophthalmography, and electromyography, among others. These electrodes can also be used in wearable and implantable medical systems. The collected signals directly affect doctors’ diagno...

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Detalles Bibliográficos
Autores principales: Wang, Song, Yan, Jin, Zhu, Canlin, Yao, Jialin, Liu, Qiusheng, Yang, Xing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019277/
https://www.ncbi.nlm.nih.gov/pubmed/31906344
http://dx.doi.org/10.3390/mi11010057
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author Wang, Song
Yan, Jin
Zhu, Canlin
Yao, Jialin
Liu, Qiusheng
Yang, Xing
author_facet Wang, Song
Yan, Jin
Zhu, Canlin
Yao, Jialin
Liu, Qiusheng
Yang, Xing
author_sort Wang, Song
collection PubMed
description Flexible electrodes are extensively used to detect signals in electrocardiography, electroencephalography, electro-ophthalmography, and electromyography, among others. These electrodes can also be used in wearable and implantable medical systems. The collected signals directly affect doctors’ diagnoses of patient etiology and are closely associated with patients’ life safety. Electrodes with low contact impedance can acquire good quality signals. Herein, we established a method of arraying pyramidal microstructures on polydimethylsiloxane (PDMS) substrates to increase the contact area of electrodes, and a parylene transitional layer is coated between PDMS substrates and metal membranes to enhance the bonding force, finally reducing the impedance of flexible electrodes. Experimental results demonstrated that the proposed methods were effective. The contact area of the fabricated electrode increased by 18.15% per unit area, and the contact impedance at 20 Hz to 1 kHz scanning frequency ranged from 23 to 8 kΩ, which was always smaller than that of a commercial electrode. Overall, these results indicated the excellent performance of the fabricated electrode given its low contact impedance and good biocompatibility. This study can also serve as a reference for further electrode research and application in wearable and implantable medical systems.
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spelling pubmed-70192772020-03-04 A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure Wang, Song Yan, Jin Zhu, Canlin Yao, Jialin Liu, Qiusheng Yang, Xing Micromachines (Basel) Article Flexible electrodes are extensively used to detect signals in electrocardiography, electroencephalography, electro-ophthalmography, and electromyography, among others. These electrodes can also be used in wearable and implantable medical systems. The collected signals directly affect doctors’ diagnoses of patient etiology and are closely associated with patients’ life safety. Electrodes with low contact impedance can acquire good quality signals. Herein, we established a method of arraying pyramidal microstructures on polydimethylsiloxane (PDMS) substrates to increase the contact area of electrodes, and a parylene transitional layer is coated between PDMS substrates and metal membranes to enhance the bonding force, finally reducing the impedance of flexible electrodes. Experimental results demonstrated that the proposed methods were effective. The contact area of the fabricated electrode increased by 18.15% per unit area, and the contact impedance at 20 Hz to 1 kHz scanning frequency ranged from 23 to 8 kΩ, which was always smaller than that of a commercial electrode. Overall, these results indicated the excellent performance of the fabricated electrode given its low contact impedance and good biocompatibility. This study can also serve as a reference for further electrode research and application in wearable and implantable medical systems. MDPI 2020-01-01 /pmc/articles/PMC7019277/ /pubmed/31906344 http://dx.doi.org/10.3390/mi11010057 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Song
Yan, Jin
Zhu, Canlin
Yao, Jialin
Liu, Qiusheng
Yang, Xing
A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title_full A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title_fullStr A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title_full_unstemmed A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title_short A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
title_sort low contact impedance medical flexible electrode based on a pyramid array micro-structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019277/
https://www.ncbi.nlm.nih.gov/pubmed/31906344
http://dx.doi.org/10.3390/mi11010057
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