Localizing strain via micro-cage structure for stretchable pressure sensor arrays with ultralow spatial crosstalk

Yufei Zhang, Qiuchun Lu, Jiang He, Zhihao Huo, Runhui Zhou, Xun Han, Mengmeng Jia, Caofeng Pan (), Zhong Lin Wang () and Junyi Zhai ()
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Yufei Zhang: Chinese Academy of Sciences
Qiuchun Lu: Chinese Academy of Sciences
Jiang He: Chinese Academy of Sciences
Zhihao Huo: Chinese Academy of Sciences
Runhui Zhou: Chinese Academy of Sciences
Xun Han: Chinese Academy of Sciences
Mengmeng Jia: Chinese Academy of Sciences
Caofeng Pan: Chinese Academy of Sciences
Zhong Lin Wang: Chinese Academy of Sciences
Junyi Zhai: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Tactile sensors with high spatial resolution are crucial to manufacture large scale flexible electronics, and low crosstalk sensor array combined with advanced data analysis is beneficial to improve detection accuracy. Here, we demonstrated the photo-reticulated strain localization films (prslPDMS) to prepare the ultralow crosstalk sensor array, which form a micro-cage structure to reduce the pixel deformation overflow by 90.3% compared to that of conventional flexible electronics. It is worth noting that prslPDMS acts as an adhesion layer and provide spacer for pressure sensing. Hence, the sensor achieves the sufficient pressure resolution to detect 1 g weight even in bending condition, and it could monitor human pulse under different states or analyze the grasping postures. Experiments show that the sensor array acquires clear pressure imaging and ultralow crosstalk (33.41 dB) without complicated data processing, indicating that it has a broad application prospect in precise tactile detection.

Date: 2023
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DOI: 10.1038/s41467-023-36885-3

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