A classic challenge in gas sensing is the tunability of the sensing material for the selective absorption of target gases without interference from unwanted species. Metal-organic frameworks (MOFs), made up of metal-cluster nodes connected by organic linkers, can achieve selective adsorption owing to their high chemical and structural tunability. Their selectivity and flexibility make MOFs attractive for gas sensing, as realized in novel low-power, low-footprint, on-chip devices such as the chemical-sensitive field-effect transistor, previously demonstrated by our group. In this project, we aim to expand on our earlier work and explore the large library of MOFs (consisting of different metal nodes and organic linkers) towards novel electronic sensor arrays. This effort includes investigating the underlying electronic transduction mechanisms of MOFs through resistance measurement, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy, and infrared and Raman spectroscopies, targeting important polluting and toxic gases such as CO2, CH4, CO, CH2O. Furthermore, the influence of various gas concentrations, Humidity conditions, and different fabrication methods will be investigated through this project.
Project ended: 01/23/2023