Ahir Bose

Integrated sensor arrays enhance sensing performance and offer an efficient method for comprehensive health monitoring, detecting various health issues in a non-invasive manner. Gold nanoparticle based chemiresistors are promising gas sensors with tunable chemical selectivity, rapid response and recovery times, high sensitivity, and low power consumption. However, limited information exists about the impact of film thickness and humidity fluctuations on their response characteristics. The rational design of these sensors for such advance applications requires the fundamental understanding of these parameters. The key step involves preparing 9DT-monothiol interlinked films with varying thicknesses using the layer-by-layer spin coating method. The response behavior differs due to variations in the thickness of the films. Differently functionalized monothiols enhance the selectivity of the films. The sensors are exposed to various analyte vapors under different humidity conditions. As the humidity levels change, the sensitivity of the films increases until saturation is reached.