A Flexible Pressure Sensor Based on Bimaterial Conductivity-Conversion Mechanism

Flexible pressure sensor with excellent sensing performance and wearability is a major research focus for wearable electronic devices. In this study, polyporrole (PPy) wrapped cotton pads and silver coated wrinkle papers are stacked together to construct a novel piezoresistive sensor, and a bimateri...

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Bibliographic Details
Published in:IEEE electron device letters 2021-12, Vol.42 (12), p.1857-1860
Main Authors: Lin, Xiuzhu, Li, Fan, Bing, Yu, Zhao, Hongran, Zhang, Tong
Format: Article
Language:English
Subjects:
Adhesive strength
bimaterial conductivity
Conversion
Cotton
Electronic devices
Monitoring
Pressure sensor
Pressure sensors
Resistance
Sensitivity
Sensors
Signal monitoring
ultra-low detection limit
Wearable computers
wearable electronics
Wearable technology
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Summary:Flexible pressure sensor with excellent sensing performance and wearability is a major research focus for wearable electronic devices. In this study, polyporrole (PPy) wrapped cotton pads and silver coated wrinkle papers are stacked together to construct a novel piezoresistive sensor, and a bimaterial conductivity-conversion mechanism is presented. The PPy-cotton pads are prepared by an in-situ vapor growth process to ensure the strong adhesion and uniform distribution of PPy, which is beneficial for the stability of pressure sensors. The optimal flexible pressure sensor exhibits fast response speed (about 50 ms) and ultra-low detection limit (0.09 Pa). The potential applications of sensors as wearable e-skin for human activity and physiological signals monitoring are also demonstrated.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2021.3118062