SiB Monolayers-Based Gas Sensor: Work Function and Conductometric Type Gas Sensors

Abstract

The air pollution and the rising emission of dangerous gases into the atmosphere are recently worrisome. In order to protect the humans and animals life's, it is crucial to monitor these harmful gases. Gases like HCHO, N₂, NH₃, CO₂, CH₄, CO, and SO₂ are dangerous for human health. As a result, gas sensors have been attracted significant interest as a means to effectively detect and adsorb these pollutants. In this study, the adsorption behavior of several common gas molecules on SiB monolayers has been investigated using density functional theory (DFT). The study focuses on examining the most stable configurations, adsorption energies, charge transfer, and electronic properties of selected gas molecules on the SiB surface. The gas adsorption behavior on SiB monolayers has been considered for use in work function type gas sensors and conductometric sensor devices. The work function of the SiB layer is found to vary between 4.06% and 27% after exposure to the selected gas molecules, indicating its high sensitivity to these gases. The current–voltage (I–V) characteristics exhibit distinct responses for different gas adsorptions on the SiB surface, particularly for HCHO, CO, and CO₂ gas molecules. Furthermore, the high sensitivity of SiB to gas adsorption open up possibilities for the improvement of gas sensing devices for monitoring and detecting harmful gases in various environments