A flexible dry electrode based on APTES-anchored PDMS substrate for portable ECG acquisition system

Meng, Ying; Li, Zhenbo; Chen, Jiapin

doi:10.1007/s00542-015-2490-y

Cited by 30 publications

(19 citation statements)

References 17 publications

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“…According to these measurements, the trend of impedances with varying frequencies was improved by graphene coating when compared to that of Baek’s [5] and Meng’s [4] results. Figure 8 shows the impedance values of conventional Ag/AgCl electrode ranges from 445.05 kΩ (at 20 Hz) to 13.82 kΩ (at 1 kHz), which are similar to results reported in the literature [4,5], and the impedance of the graphene-coated electrode varies from 65.82 kΩ (at 20 Hz) to 5.10 kΩ (at 1 kHz). The results show that the graphene-coated electrode has lower skin–electrode contact impedance compared to the conventional Ag/AgCl electrode, resulting in less noise and a higher quality ECG signal, which is shown in Figure 9.…”

Section: Resultsmentioning

confidence: 69%

“…In order to get a high-quality signal acquisition with minimal noise, the impedance measurement of skin–electrode should be small and stable. To characterize the impedance of the graphene-coated electrode, a measurement setup was constructed based on earlier techniques reported in the literature [4,5]. Here, we measured the electrode–skin contact impedance of three GN-coated electrodes with different sizes, and compared with that of the conventional Ag/AgCl electrode (see Figure 8).…”

Section: Resultsmentioning

confidence: 99%

“…Several attempts have been made in fabrication of dry-contact ECG electrodes made of metallic and silicon substrates that penetrate the skin surface for electrophysiological measurements [4,5,6]. Although this method is clinically invasive and gel-less contact with the skin, it is difficult to satisfy electrical stability between skin and the electrode.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Graphene-Enabled Electrodes for Electrocardiogram Monitoring

Celik

Manivannan

Strudwick³

et al. 2016

Nanomaterials

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The unique parameters of graphene (GN)—notably its considerable electron mobility, high surface area, and electrical conductivity—are bringing extensive attention into the wearable technologies. This work presents a novel graphene-based electrode for acquisition of electrocardiogram (ECG). The proposed electrode was fabricated by coating GN on top of a metallic layer of a Ag/AgCl electrode using a chemical vapour deposition (CVD) technique. To investigate the performance of the fabricated GN-based electrode, two types of electrodes were fabricated with different sizes to conduct the signal qualities and the skin-electrode contact impedance measurements. Performances of the GN-enabled electrodes were compared to the conventional Ag/AgCl electrodes in terms of ECG signal quality, skin–electrode contact impedance, signal-to-noise ratio (SNR), and response time. Experimental results showed the proposed GN-based electrodes produced better ECG signals, higher SNR (improved by 8%), and lower contact impedance (improved by 78%) values than conventional ECG electrodes.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene-Enabled Electrodes for Electrocardiogram Monitoring

Celik

Manivannan

Strudwick³

et al. 2016

Nanomaterials

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“…Therefore, most of the biopotential signal would be coupled through C SP to electrode (Yoo and Hoof 2012). Thus, the total impedance of this model can be expressed as (Meng et al 2015) and its modulus is where S is the electrode-electrolyte interface area, ρ and ε are the resistivity and dielectric of the epidermis respectively, d is the epidermis thickness, ω is the signal frequency.…”

Section: Analysis and Design Of The Dry Electrodementioning

confidence: 99%

An FPC based flexible dry electrode with stacked double-micro-domes array for wearable biopotential recording system

et al. 2016

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“…[24] In the present work, we describe a straightforward approach to fabricate flexible nanoporous gold electrodes for electrochemical sensing in samples with complex matrices using white gold leaf and a PDMS flexible support. PDMS [17,[25][26][27][28][29][30][31][32][33] is a promising substrate to use not only because it is flexible but also inexpensive, biocompatible, and optically transparent. [30,34] As with glass substrates, the attachment of gold to PDMS often utilizes a linker molecule such as 3-mercaptopropyltrimethoxysilane.…”

Section: Introductionmentioning

confidence: 99%

Flexible Nanoporous Gold Electrodes for Electroanalysis in Complex Matrices

2019

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Flexible, three‐dimensional nanoporous gold (NPG) electrodes were fabricated on polydimethylsiloxane (PDMS) surfaces without any functionalization, and their electrochemical properties examined in the absence and presence of common biofouling agents using cyclic voltammetry and redox potentiometry. In this work, potassium ferricyanide and fibrinogen were used as a model redox probe and denaturing agent, respectively, to demonstrate that flexible NPG electrodes behave ideally and can make electrochemical measurements in biofouling solutions. Using cyclic voltammetry, the non‐faradaic capacitive current was shown to be directly proportional to the scan rate, while the redox chemistry of potassium ferricyanide in the presence and absence of fibrinogen demonstrated reversible voltammetry. Using redox potentiometry, Nernst plots for the potassium ferri‐/ferrocyanide redox system gave rise to an expected Nernstian slope of 60 mV. These flexible electrodes could be particularly beneficial in electrochemical sensing in complex environments. Proof of concept was demonstrated through the measurement of uric acid in red blood cell packets using cyclic voltammetry.

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A flexible dry electrode based on APTES-anchored PDMS substrate for portable ECG acquisition system

Cited by 30 publications

References 17 publications

Graphene-Enabled Electrodes for Electrocardiogram Monitoring

Graphene-Enabled Electrodes for Electrocardiogram Monitoring

An FPC based flexible dry electrode with stacked double-micro-domes array for wearable biopotential recording system

Flexible Nanoporous Gold Electrodes for Electroanalysis in Complex Matrices

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