Graphene elastomer electrodes for medical sensing applications: combining high sensitivity, low noise and excellent skin compatibility enabling continuous medical monitoring

Sajjad Asadi, Zijun He, Fatima Heydari, Dan Li, Mehmet Rasit Yuce, Tuncay Alan

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Continuous monitoring of vital bio-signals is crucial to track the well-being of patients and to allow for timely medical intervention in cases of emergency. This paper presents a compact and wearable electrocardiogram (ECG) sensor using graphene-elastomer electrodes, which were characterised, first using an electronic patient simulator, then on a human subject. We demonstrate that the proposed electrodes are highly conductive, flexible and ultralight (weighing less than 10 mg). Their skin-impedance values are significantly lower than existing electrodes
including other graphene-based sensors. In addition, we demonstrate that they can be applied on the skin in dry form
without needing an intermediate gel layer, or excessive mechanical pressures, overcoming an important challenge for
long term monitoring applications. The results in this work show that the proposed configuration is highly sensitive, and with the exciting features of deformation and skin-friendly attachment, it can enable the design of wearable devices that outperform well-refined commercial sensors, providing great potential for electronic/mobile health applications.
Original languageEnglish
Number of pages8
JournalIEEE Sensors Journal
DOIs
Publication statusAccepted/In press - 18 Jun 2020

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