Humidity sensing performance of the magnesium oxide nanoparticles

In this present scenario, the humidity sensing response of the green synthesized Magnesium oxide Nanoparticles (MgO NPs) had been viewed. Here the MgO NPs synthesized by green synthesis method with green tea extract as fuel. The structural, functional and morphological characterizations like XRD (x-Ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscope), EDS (Energy dispersive X-ray spectroscopy), TEM (transmission electron microscopy), SEAD (Selected area electron diffraction) were performed for the sample. The important observation in the morphological studies is that: The MgO NPs shows the irregular clusters of particles which can be clearly distinguished has been confirmed from TEM images. The rise in the surface area and porosity confirmed from SEM studies. For the humidity sensing measurements, the sensing film of the MgO NPs prepared by groomed the sample on the glass plate using spin coating unit. The MgO NPs has shown an epitome sensitivity of 99.84% at room temperature with a rapid response time and recovery time of 14 and 26 s, respectively. The MgO NPs has gained a least real sensitivity with less LOD (Limit of detection). Also, the sample has recorded a trifling hysteresis, good linearity and shown an exact stability. The physical parameters for MgO NPs also calculated to determine the potentiality as a perfect sensor. The sensing mechanism also hashed out on the basis of the establishment of chemisorption and physisorption layers.