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Ultra-sensitive pressure sensor sponge

Wearable pressure sensors are essential for real-time monitoring of human activities and the status of biomimetic robots.Recently, a joint team of Zhang Mingjia, an associate researcher at the Qingdao Institute of Bioenergy and Processes, Chinese Academy of Sciences, and Huang Changshui, a researcher at the Institute of Chemistry, Chinese Academy of Sciences, prepared an ultrasensitive pressure sensor sponge through a simple method, realizing ultrasensitive wearable health monitoring. pressure sensing.The related results were published online in the journal Nano Communications on March 25, 2022.

In this study, researchers fabricated an ultrasensitive pressure sensor sponge using liquid metal modulation of nitrogen-doped graphene nanosheets.Since the liquid metal in the sponge skeleton structure helps to tune the contact area with nitrogen-doped graphene nanosheets under pressure, thereby promoting charge transfer at the interface, such sensors have fast response and recovery speed, response/recovery time is 0.41/0.12 seconds.

It is worth noting that the liquid metal-based sponge pressure sensor can accurately monitor the human pulse, skin pressure, throat swallowing and other activities in real time, showing broad application prospects.

convenient and low-cost method for fabricating easy-to-perceive pressure sensors, expanding the application potential of liquid metal matrix composites for the development of future electronic skins.

Post time: Jun-10-2022
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