Ke Ningfeng, Si Fangcheng, Ma Hongliang, Gao Qiang, Ge Gengwu, Liu Wei, Ding Jie, Zhang Wendong, Fan Xuge
Advanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology, Beijing 100081, China.
Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing 314003, China.
ACS Appl Mater Interfaces. 2025 Jan 8;17(1):2317-2326. doi: 10.1021/acsami.4c18757. Epub 2024 Dec 28.
Humidity sensors have been widely used to monitor humidity in daily life, agriculture fields, and so on. However, conventional sensors are not suitable for wearable devices because of their large dimensions and rigid substrates. Hence, we report a fast response, highly sensitive, and fully flexible humidity sensor on a PI substrate based on the composite material of reduced graphene oxide (rGO)/MoS, with a response time of 0.65 s and a sensitivity of 96.7% in the relative humidity range of 11% RH-95% RH. A fully flexible wearable device was realized by integrating the prepared flexible humidity sensor with a flexible printed circuit, which was successfully applied for human breathing monitoring, motion monitoring, and nontouch switches. These results show that the rGO/MoS composite is a good candidate for humidity sensing and has the potential to be used in the fields of wearable devices and nontouch switching.
湿度传感器已被广泛应用于日常生活、农业领域等的湿度监测。然而，传统传感器由于尺寸较大且基底刚性，不适用于可穿戴设备。因此，我们报道了一种基于还原氧化石墨烯（rGO）/MoS复合材料、在PI基底上的快速响应、高灵敏度且完全柔性的湿度传感器，其在11%RH - 95%RH的相对湿度范围内响应时间为0.65 s，灵敏度为96.7%。通过将制备的柔性湿度传感器与柔性印刷电路集成，实现了一种完全柔性的可穿戴设备，该设备成功应用于人体呼吸监测、运动监测和非接触式开关。这些结果表明，rGO/MoS复合材料是湿度传感的良好候选材料，具有在可穿戴设备和非接触式开关领域应用的潜力。
