(269d) Development of a Gas Sensor Array for Detecting Toxic VOCs Using Metalated Gold Monolayer Protected Clusters
AIChE Annual Meeting
2023
2023 AIChE Annual Meeting
Topical Conference: Sensors for Sustainability
Next-Gen Sensors
Monday, November 6, 2023 - 4:20pm to 4:35pm
A gas sensor array has been fabricated using micro-electromechanical system (MEMS) technology. The sensor array features four circularly shaped sensing areas containing interdigitated electrodes that can perform simultaneously testing four different sensing materials. Lithium, sodium, potassium, and cesium carboxylate-linked Au MPCs were synthesized and tested for sensing vapors of BTEX, TCE as well as some non-aromatic and chlorinated VOCs. The results demonstrate that the responses of metalated Au MPCs are rapid, reversible, and linear for all the tested analytes. Cation-linked Au MPCs improve sensitivity and selectivity toward sensing BTEX due to cationâÏ interactions and the relative strength of the sensitivity follows the order of K+ > Na+ > Li+. Furthermore, Cs+-functionalized Au MPCs respond highly to chlorinated compounds, which helps to detect TCE in air. These metalated Au MPCs sensors show much promise for developing a sensor array for real-time measurements of toxic airborne VOCs.