提升基于金属银纳米线导电网络柔性应力传感器性能的策略

Strategies to Improve Performances of Flexible Stress Sensors Based on Silver Nanowire Networks

与传统传感器相比,柔性应力传感器的核心材料不再局限于金属和半导体材料,且具有柔软可穿戴等特点,已被广泛应用于多个领域,例如:电子皮肤,智能监控,医疗器械以及人机交互等。在众多导电材料中,银纳米线导电网络材料由于其优良的导电性受到诸多青睐。然而,就性能而言,基于银纳米线导电网络的柔性应力传感器却不具有令人满意的灵敏度。因此,如何提高柔性应力传感器的灵敏度已成为银纳米线基柔性电子器件领域的热点问题。本综述重点介绍了基于金属银纳米线导电网络的柔性应力传感器,并分别从电阻式和电容式柔性应力传感器出发,研究提升这两类传感器灵敏度的策略,主要包括微结构、图案化和掺杂等方法。

Compared with traditional sensors, the key materials of the flexible stress sensors(FSSs) are no longer limited to the metals and semiconductors. FSSs show the characteristics of softness and wearability, which have been widely used in many fields, such as electronic skin, intelligent monitoring, medical devices and human-computer interaction. Among many conductive materials, the conductive network material of silver nanowires is favored because of its excellent conductivity. However, the FSSs based on silver nanowire networks does not have satisfactory sensitivity. Therefore, how to improve the sensitivity of flexible sensors has become a hotspot in the research field of flexible silver nanowire-based electronic devices. This review focuses on the preparation of FSSs based on metallic silver nanowire networks, and mainly studies on the different strategies for improving the sensitivity of two types of sensors from the perspective of resistive and capacitive flexible sensors, which includes microstructure, patterning and doping etc.