Abstract—With the development of information technology
as well as the arrival of the age of big data, researchers and
engineers begin to pay attention to personal health data and
biomedical electronics. At this time, real-time monitoring of the
physiological signal of humans, such as electrocardiograph
(ECG) signal, becomes vital to human beings. However, the
traditional (Ag/AgCl) electrode has a couple of disadvantages
such as poor stability, material waste, and heavy metal pollution.
Here, our group has proposed a novel flexible ECG sensor,
which is fabricated of graphene and polyvinyl alcohol (PVA)
film via double transfer technique. In this electrode, graphene
has been introduced as an active layer, while PVA film is served
as a flexible electrode substrate. As a result, this whole sensor
exhibits excellent mechanical and electrical properties and it
can be biodegraded after use. The flexible sensor has a Young’s
modulus of 8.598 MPa, a maximum strain of 135%, and a
resistivity of 35.88Ω·m. Additionally, its resistance fluctuated
within 20% strain. Then, an ancillary signal processing circuit
is designed for analog signal collecting from the flexible sensor.
The digital signal processing system is programmed including
analog digital converter (ADC), microprocessor, signal
transmission, and mobile application software. In conclusion,
the whole system achieves the measurement and display of ECG
signal in real-time and offers a better solution for biomedical
electronics in the future.
Index Terms—Skin-conformal, biomedical electronics,
real-time, wireless system, recyclable.
Nan Wu, Hui Liu, Shi Su, Haizhou Huang, and Litao Sun are with Key
Lab of MEMS of Ministry of Education, Southeast University, Nanjing, CO
210009 China (e-mail: wun@seu.edu.cn, 220181360@seu.edu.cn,
shi.su@seu.edu.cn, hhz@seu.edu.cn, slt@seu.edu.cn).
Shu Wan is with School of Optoelectronics Engineering, Chongqing
University, Chongqing, CO 400044 China (e-mail: wanshu@cqu.edu.cn).
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Cite: Nan Wu, Hui Liu, Shu Wan, Shi Su, Haizhou Huang, and Litao Sun, "Ultrahigh Skin-Conformal and Biodegradable Graphene-based Flexible Sensor for Measuring ECG Signal," International Journal of Information and Electronics Engineering vol. 10, no. 2, pp. 52-56, 2020.
