Abstract
The amount of water vapours in the air can affect the productivity and safety of many manufacturing processes, such as agriculture, pharmaceuticals, and semiconductor industries, as well as human comfort. The humidity sensors based on porous materials, such as Porous Anodic Alumina (PAA), have persuaded much attention because of their high porosity and tuneable structure. In this work, we have developed a PAA capacitive sensor using phosphoric acid electrolyte by the Differential Pulse Voltammetry method of anodization. The PAA-based humidity sensor shows ultra-high sensitivity, fast response, and a wide detection range of relative humidity (RH). Response and recovery time of the sensor are ~ 16 s and ~ 4 s, respectively at 64 RH%, and the sensor is capable of sensing 1-100 RH%. These results advocate that PAA is a propitious applicant for various humidity sensing applications, especially where low humidity detection is required i.e., paper, lithium-ion battery, tea industries, etc.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
