A multidimensional hierarchical structure designed for lateral strain-isolated ultrasensitive pressure sensing
| Autor: | Zefei Peng, Shuqi Liu, Wu Yaoyi, Lan Liu, Song Chen, Deng Zhifu, Shuting Xing, Junyun Li |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Materials Chemistry C. 8:922-929 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc06213k |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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