期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 3, 页码 922-929出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc06213k
关键词
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资金
- National Natural Science Foundation of China [51573053]
- Key Project of Guangzhou Science and Technology Plan Project [805223474067]
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.
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