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Issue 3, 2020
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A multidimensional hierarchical structure designed for lateral strain-isolated ultrasensitive pressure sensing

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Abstract

Most of the as-reported piezoresistive sensors are difficult to use under dynamic deformation (e.g., bending, twisting, and buckling) since their pressure sensitivities vary significantly as a result of the lateral strain induced by dynamic deformation. Herein, taking advantage of the “modulus mismatch” and “Poisson effect”, a brand new multidimensional hierarchical structure (i.e., a wrinkle structure arranged in the pre-stretching direction and arch structure perpendicular to the pre-stretching direction) is designed and introduced in strain-isolated ultrasensitive piezoresistive sensing. The obtained pressure sensitivity is as high as 4.54 kPa−1 under small pressures (0–200 Pa) and remains constant under variable lateral strains (0–150%). The aim of this novel structure is to realize accurate pressure measurements under dynamic deformation and superior properties in conjunction with a low detection limit, fast response, and high stability, making our piezoresistive sensors promising in various practical and clinical applications, such as real-time health monitoring and wearable sensing devices.

Graphical abstract: A multidimensional hierarchical structure designed for lateral strain-isolated ultrasensitive pressure sensing

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Supplementary files

Article information


Submitted
13 Nov 2019
Accepted
04 Dec 2019
First published
05 Dec 2019

J. Mater. Chem. C, 2020,8, 922-929
Article type
Communication

A multidimensional hierarchical structure designed for lateral strain-isolated ultrasensitive pressure sensing

J. Li, S. Chen, Z. Peng, Z. Deng, S. Xing, Y. Wu, S. Liu and L. Liu, J. Mater. Chem. C, 2020, 8, 922
DOI: 10.1039/C9TC06213K

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