Silver nanowires (AgNW) have excellent electrical conductivity, transparency, and flexing endurance, and are broadly used in flexible electrodes and flexible sensors. This study mixed the silver nanowires and polyimide (PI) polymer using an in situ synthesis method, effectively reducing the problem of silver nanowires falling off the substrate. The selective wet etching method was firstly used to process the surface of AgNW-PI films, greatly enhancing the surface conductivity of AgNW-PI films. A flexible pressure sensor with high sensitivity was designed with two face-to-face AgNW-PI ultrathin layers. The experimental results show that our sensor presented a high sensitivity of about 1.3294 kPa-1 under a pressure of about 600 Pa, and when pressure continued to increase, the sensitivity decreased rapidly and reached saturation. Our flexible pressure sensor has the properties of low cost, high sensitivity, excellent repeatability, durability, and can detect various types of mechanical forces which could be utilized for flexible electronics.

中文翻译：

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由嵌入聚酰亚胺（AgNW-PI）中的银纳米线设计的高灵敏度柔性压力传感器。

银纳米线（AgNW）具有出色的导电性，透明性和耐弯曲性，并且广泛用于柔性电极和柔性传感器中。这项研究使用原位合成方法将银纳米线和聚酰亚胺（PI）聚合物混合在一起，有效地减少了银纳米线从基板上掉落的问题。首先采用选择性湿法刻蚀法对AgNW-PI膜的表面进行处理，大大提高了AgNW-PI膜的表面电导率。设计了具有两层AgNW-PI超薄面对面的柔性高灵敏度压力传感器。实验结果表明，我们的传感器在约600 Pa的压力下具有约1.3294 kPa-1的高灵敏度，并且当压力持续增加时，灵敏度迅速下降并达到饱和。