Enhanced humidity sensor using go based nanocomposite with orchestration of electrode size and humidity management for sustainable critical environments

Abstract

Sensing and controlling humidity is a major challenge since it affects the newlinesensing properties of every type of sensor used in high-precision equipment newlinemanufacturing industries. GO-based materials have been explored for a long in humidity newlinesensing applications because of their high surface area and functional groups. However, newlinesimple effective synthesis of 2D-based nanocomposites with comb electrode fabrication newlineis limited for bulk manufacturing. Also, water intercalation within the layers of 2D newlinematerials increases recovery time. This work demonstrates an enhanced sensing of newlinecapacitive/resistive humidity sensor having a GO-MnZnO nanocomposite as a sensing newlinelayer produced with low-cost materials in a single pot synthesis method. The in-plane newlinesensing layer improves sensitivity consistently and response time is reduced for a wide newlinesensing range of relative humidity measurement (10% to 90%). Interdigitated electrodes newline(made of gold) with variations in the number of fingers and spacing have been fabricated newlineusing photolithography on a Si/SiOand#8322; for an effective sensor device platform. Choosing newlinethe type of nanomaterial, the dimension of the sensor, and the fabrication method play a newlinevital role in optimizing the performance of the humidity sensor in a localized newlineenvironment. GO nanocomposite shows a potent increase in terms of response (82.67 newlinetimes greater at 40% RH) and sensitivity (95.7 times more at 60% RH). The response newlinetime (4.5 s) and recovery time (21 s) are obtained, which are better than the reduced GO newlinesensing layer as well as ZnMnO, for a wider range of relative humidity. An optimized 6 newlinemm x 3 mm dimension sensor with 28 fingers comb, fabricated with a metal-etching newlineprocess. This is one of the best methods for effective bulk manufacturing. The newlineperformance of the sensing layer is comparable to the established sensing nanomaterials newlinethat are currently used in humidity sensors and hence can be extended for optimal bulk newlinemanufacturing with minimum electrochemical treatments. newline