Wang Yanjie, Wang Jiale, Hao Muyu, Li Bo, Zhu Zicai, Gou Xiaofan, Li Lijie
College of Mechanical and Electrical Engineering, Hohai University, Changzhou Campus Changzhou 213022 China
Multidisciplinary Nanotechnology Centre, College of Engineering, Swansea University Swansea SA1 8EN UK.
RSC Adv. 2020 Jul 22;10(46):27447-27455. doi: 10.1039/d0ra01650k. eCollection 2020 Jul 21.
In this study, we present a novel humidity-responsive composite film based on the integration of two silver nanowire (Ag NW) layers deposited the physical deposition process with an ionomer (Nafion) layer sandwiched between them. As a result of the ion migration inside the ionomer, the humidity to electrical transduction displays a fast response and high sensitivity in comparison with previous research. Meanwhile, the effects of the humidity gradient on the sensing response of the Nafion/Ag NWs composite film were investigated. Specifically, a higher humidity enables a faster response rate but a slower recovery rate, as compared to a lower humidity level. In addition, breathing tests are performed, which verified the opportunities for the design and fabrication of high-performance sensors for environment and biophysical monitoring. This research also revealed the potential applications in VOC (volatile organic compound) detection.
在本研究中，我们展示了一种新型的湿度响应复合膜，它基于通过物理沉积过程沉积的两层银纳米线（Ag NW）与夹在它们之间的离聚物（Nafion）层的整合。由于离聚物内部的离子迁移，与先前的研究相比，湿度到电的转换显示出快速响应和高灵敏度。同时，研究了湿度梯度对Nafion/Ag NWs复合膜传感响应的影响。具体而言，与较低湿度水平相比，较高湿度能实现更快的响应速率，但恢复速率较慢。此外，进行了呼吸测试，这验证了设计和制造用于环境和生物物理监测的高性能传感器的机会。这项研究还揭示了在挥发性有机化合物（VOC）检测中的潜在应用。
