Abstract
Volatile Organic Compounds (VOCs) encompass a very wide range of organic compounds characterized by high vapor pressure at lower temperatures, which gives them significant volatility already at room temperatures. They are present in the living and work environments. Long-term indoor exposure to VOCs can cause fatigue, headache, nausea, eye, nose, and throat irritation in sensitive persons, but also damage the central nervous system and other organs. Because of their widespread occurrence in our environment, there is a need for good detectors and sensors for VOCs. We have investigated the perturbation of the physico-chemical the properties of Zinc Oxide (ZnO) and Metal-Organic Frameworks (MOFs) in the presence of VOCs, and developed a novel approach for the detection of such VOCs utilizing Broadband Dielectric Spectroscopy (BDS) techniques.In this talk, we will review the current state-of-the-art in MOF sensing research to provide a context for the novel BDS metrology we have developed, discuss our effort to elucidate the sensing mechanisms of HKUST-1 MOF films with BDS, and showcase the capabilities of BDS for metal-oxide sensing research advancement. Specifically, we will focus on the use of surface anchored MOF (SURMOF)– as opposed to free running powdery MOFs, as sensing agents. Our results show that the SURMOF sensing agent is stable, more robust, and more sensitive in detecting VOCs, than traditional metal oxide (MOS) agents even at temperatures well below 100 °C.
Published Version
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