Chemiresistive gas sensors based on semiconductor metal oxides, such as tin oxide (SnO₂), play a critical role in detecting toxic gases and monitoring pollution in industrial and environmental applications. Siloxanes, organic compounds that contain silicon and oxygen atoms and are widely used in personal care products, are commonly present in various environments. The presence of these compounds can significantly degrade sensor performance by modifying the oxide surface, altering its gas adsorption properties, and reducing both sensitivity and selectivity in gas sensing. To address this challenge, this study aims to investigate the impact of siloxane adsorption on the surface chemistry and sensing performance of semiconductor metal oxides. Furthermore, the study is exploring various mitigation strategies to counteract siloxane-induced deactivation. To accomplish these objectives, a variety of analytical techniques will be employed to characterize the chemical state of siloxanes at the oxide interface and evaluate the efficacy of these strategies. This study provides insights into the interaction between siloxanes and metal oxide surfaces, offering a foundation for the development of more resilient gas sensors capable of maintaining performance in environments with ubiquitous siloxane exposure.
Project is currently funded by: Industry Sponsored Research