Development and Analysis of MgO Nanocrystals Doped with PVA for High-Performance Humidity Sensing

The potential use of magnesium oxide (MgO) nanocrystals in humidity sensing over a broad range of relative humidity (RH) levels was studied and produced. To obtain the required crystallinity and surface morphology, the sol-gel process was used to generate the nanocrystalline MgO, which was then carefully calcined. XRD, SEM techniques were used for structural and morphological investigations in order to verify the material's high surface area and nanoscale nature, both of which are essential for efficient humidity sensing. The impedance response of the MgO sensor was measured at different relative humidity values, ranging from 40% to 80% at room temperature, in order to assess the humidity sensing performance. High sensitivity, strong repeatability, and quick response/recovery times were indicated by the results, which showed a considerable and reversible change in impedance with increasing humidity. These results show that MgO nanocrystals are potential options for stable and reasonably priced humidity sensors in industrial and environmental monitoring applications.