Biocompatible gel-free coconut-oil and carbon black electrodes for ECG and respiration measurements

García-García, LA, Johnson, A, Kreitmair, PM, Lugoda, P ORCID: https://orcid.org/0000-0002-5959-9500, Pouryazdan, A, Roggen, D and Münzenrieder, N, 2023. Biocompatible gel-free coconut-oil and carbon black electrodes for ECG and respiration measurements. IEEE Sensors Journal. ISSN 1530-437X

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Abstract

The current state of the art in telemedicine has increased the interest in long term monitoring of physiological and bioelectric signals. This motivated the development of materials and techniques for the fabrication of biocompatible, user and environmentally friendly alternatives to conventional resistive wet electrodes. Here we report a method for the fabrication of dry flexible and stretchable electrodes based on Coconut-Oil and Carbon Black for the monitoring of electrophysiological signals without conductive gels. The highly stretchable material shows a specific resistance ρ down to 33.2±12.3Ωm, high conformability, and a stretchability up to 1500%. The epidermal electrodes were used to record Electrocardiographic (ECG) signals and measure respiration in a 3-lead configuration and compared to commercial wet electrodes. Even after being elongated by 100% for 100 stretch/release cycles, a reliable recording of the QRS-complex is demonstrated without the need for any contact enhancer or substances that cause skin reaction, demonstrating the potential use of this material for long term ECG monitoring applications.

Item Type:	Journal article
Publication Title:	IEEE Sensors Journal
Creators:	García-García, L.A., Johnson, A., Kreitmair, P.M., Lugoda, P., Pouryazdan, A., Roggen, D. and Münzenrieder, N.
Publisher:	Institute of Electrical and Electronics Engineers
Date:	1 March 2023
ISSN:	1530-437X
Identifiers:	Number Type 10.1109/JSEN.2023.3249159 DOI 1735146 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	13 Apr 2023 08:44
Last Modified:	13 Apr 2023 08:44
URI:	https://irep.ntu.ac.uk/id/eprint/48722

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