Modification of conductive sponge-AgNWs flexible stress sensor
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摘要:以导电海绵为基底，并将其与银纳米线（AgNWs）复合作为柔性电极，制备了一系列柔性应力传感器，其具有良好的灵敏度和重复性．研究发现AgNWs均匀附着在导电海绵的泡沫网络中．受力时随着海绵泡沫结构大形变的同时，AgNWs结构在微观上也产生次级形变，这种多层次的导电网络结构变化有利于增强应力传感器的灵敏度．考察了不同介电材料、介电层厚度、AgNWs滴涂层数等条件对灵敏度的影响，并优化了制备条件，实现了传感器的可控制备．本文制备的传感器制备方法简单，有一定实际应用前景．Abstract:Flexible stress sensor is a key component in wearable devices．Sensitivity of flexible stress sensor determines detection properties．Thus, investigation of sensitivity influence factors in the preparation process could help to improve sensor properties and controllable preparation．In this study, a novel series of flexible stress sensors were prepared by combining Ag nanowires (AgNWs) with conductive sponge substrates．Structural characterizations show that AgNWs adheres to the network of conductive sponge uniformly．When stress is applied, conductive sponge presents large-scale deformation and AgNWs shows subordinate deformation in microstructure．Multiple deformation including conductive sponge and AgNWs microstructure could enhance the sensitivity of flexible stress sensor．The flexible stress sensors in this work exhibit excellent sensitivity and repeatable durability．The influence of different dielectric materials, the thickness of dielectric layer and layers of dripping AgNWs is investigated carefully．The preparation process is optimized and can be controlled．The preparation process in this study is simple and is fit for large-scale production, with great application prospects in the future．
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Key words:
- stress sensor/
- Ag nanowires (AgNWs)/
- conductive sponge/
- microstructure/
- flexible
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