Flexible piezoresistive sensors are highly desirable for tactile sensing and wearable electronics. However, the reported flexible piezoresistive sensors have the inherent trade-off effect between high sensitivity and wide pressure ranges. Herein, we report a flexible piezoresistive sensor with a three-dimensional (3D) porous microstructured sensing layer composed of silver nanowires (AgNWs) and a poly(vinylidene fluoride) (PVDF) matrix, exhibiting high sensitivity and wide pressure ranges. Benefiting from the conductive networks of AgNWs and the 3D porous structure of PVDF, the porous AgNWs/PVDF composite (PAPC)-based flexible piezoresistive sensor exhibits high sensitivities of 0.014 and 0.009 kPa^–1 in the wide pressure ranges of 0–30 and 30–100 kPa, respectively. In addition, the fabricated sensor also shows a fast response time of 64 ms, a low detection limit of 25 Pa, and long-term durability over 10,000 continuous cycles. The PAPC-based flexible piezoresistive sensor can accurately monitor various human physiological activities (ranging from subtle deformations to vigorous body movements) by quantitatively measuring the tactile sensation on human skin. This work indicates that the proposed sensor can be potentially applicable to mobile healthcare monitoring devices as well as next-generation wearable electronics.

中文翻译：

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基于多孔 AgNWs/聚（偏二氟乙烯）复合材料的柔性压阻传感器，具有高灵敏度和宽压力范围

柔性压阻传感器非常适合用于触觉传感和可穿戴电子产品。然而，报道的柔性压阻传感器在高灵敏度和宽压力范围之间具有固有的权衡效应。在此，我们报告了一种柔性压阻传感器，其具有由银纳米线 (AgNWs) 和聚偏二氟乙烯 (PVDF) 矩阵组成的三维 (3D) 多孔微结构传感层，具有高灵敏度和宽压力范围。得益于 AgNWs 的导电网络和 PVDF 的 3D 多孔结构，基于多孔 AgNWs/PVDF 复合材料 (PAPC) 的柔性压阻传感器具有 0.014 和 0.009 kPa ^{–1的高灵敏度}分别在 0-30 和 30-100 kPa 的宽压力范围内。此外，制造的传感器还显示出 64 毫秒的快速响应时间、25 Pa 的低检测限以及超过 10,000 次连续循环的长期耐用性。基于 PAPC 的柔性压阻式传感器可以通过定量测量人体皮肤上的触觉来准确监测人体的各种生理活动（从细微的变形到剧烈的身体运动）。这项工作表明，所提出的传感器可能适用于移动医疗监控设备以及下一代可穿戴电子设备。