Journal
SENSORS
Volume 16, Issue 11, Pages -Publisher
MDPI AG
DOI: 10.3390/s16111833
Keywords
graphene; ECG; flexible electrode; home health
Funding
- National Natural Science Foundation of China [61673158, 11304103, 61473112]
- Funds for Distinguished Young Scientists of Hebei Province [F2016201186]
- Natural Science Foundation of Hebei Province [F2015201112]
- Colleges and Universities in Hebei Province Science and Technology Research Point Project [ZD2015067, QN2015135]
- Top Young and Middle-aged Innovative Talents of science and technology research project in Hebei province [BJ2016005]
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This paper describes the development of a graphene-based dry flexible electrocardiography (ECG) electrode and a portable wireless ECG measurement system. First, graphene films on polyethylene terephthalate (PET) substrates and graphene paper were used to construct the ECG electrode. Then, a graphene textile was synthesized for the fabrication of a wearable ECG monitoring system. The structure and the electrical properties of the graphene electrodes were evaluated using Raman spectroscopy, scanning electron microscopy (SEM), and alternating current impedance spectroscopy. ECG signals were then collected from healthy subjects using the developed graphene electrode and portable measurement system. The results show that the graphene electrode was able to acquire the typical characteristics and features of human ECG signals with a high signal-to-noise (SNR) ratio in different states of motion. A week-long continuous wearability test showed no degradation in the ECG signal quality over time. The graphene-based flexible electrode demonstrates comfortability, good biocompatibility, and high electrophysiological detection sensitivity. The graphene electrode also combines the potential for use in long-term wearable dynamic cardiac activity monitoring systems with convenience and comfort for use in home health care of elderly and high-risk adults.
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