Ge Gengwu, Ke Ningfeng, Ma Hongliang, Ding Jie, Zhang Wendong, Fan Xuge
Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.
Center for Interdisciplinary Science of Optical Quantum and NEMS Integration, Beijing Institute of Technology, 100081 Beijing, China.
Nanoscale. 2024 Oct 3;16(38):17804-17816. doi: 10.1039/d4nr02207f.
Graphene oxide (GO)-based humidity sensors are attracting widespread attention due to their high responsivity and low cost. However, GO-based humidity sensors generally suffer from slow response and recovery as well as poor stability. Here, we report a flexible resistive humidity sensor based on a MoS/GO composite film that was fabricated by mixing different volumes of MoS and GO dispersions with adjustable volume ratios. The MoS/GO composite film has been used as a sensing layer on screen-printed interdigital electrodes. The results show that the best device performance was achieved at a dispersion volume of 0.05 mL with a MoS/GO volume ratio of 5 : 1, featuring a high responsivity (∼98%), a fast response/recovery time (1.3/12.1 s), excellent stability and low cost. Furthermore, the humidity sensor exhibits good linearity over a wide humidity range (33%RH-98%RH) at room temperature (25 °C) and can be fabricated easily and feasibly. The application of the humidity sensors we prepared in human respiration detection and human fingertip proximity detection has been demonstrated. These findings indicate the great potential of the MoS/GO composite in developing next generation high-performance humidity sensors.
基于氧化石墨烯（GO）的湿度传感器因其高响应度和低成本而受到广泛关注。然而，基于GO的湿度传感器通常存在响应和恢复缓慢以及稳定性差的问题。在此，我们报道了一种基于MoS/GO复合膜的柔性电阻式湿度传感器，该复合膜通过将不同体积的MoS和GO分散体以可调体积比混合制备而成。MoS/GO复合膜已被用作丝网印刷叉指电极上的传感层。结果表明，当分散体体积为0.05 mL且MoS/GO体积比为5:1时，器件性能最佳，具有高响应度（约98%）、快速响应/恢复时间（1.3/12.1 s）、优异的稳定性和低成本。此外，该湿度传感器在室温（25°C）下的宽湿度范围（33%RH - 98%RH）内表现出良好的线性度，并且可以轻松、可行地制备。我们制备的湿度传感器在人体呼吸检测和人体指尖接近检测中的应用已经得到了证明。这些发现表明MoS/GO复合材料在开发下一代高性能湿度传感器方面具有巨大潜力。
