bcmubx2107 – Capacitive sensor based on Metal Organic Frameworks for volatile organic compounds detection
Poster-EFernandezAbstract
We evaluate the potential of 2D printing technologies to create thin film gas sensors from ionic liquid (IL)/metal-organic framework (MOF) composites. To accomplish this, we synthesized the MOF solvothermally then impregnated it with the IL. The structure and basic properties of the IL/MOF composites were characterized using thermal, spectroscopic and X-ray diffraction techniques, and the resultant sensing capacity of the bulk material was evaluated by impedance spectroscopy. The IL/MOF systems were then integrated into a 2D printed silver capacitive circuit by spray and tested on a custom-made gas flow apparatus. Exposure of the IL/MOF based sensors to water, acetone and ethanol induces a repetitive variation of the capacitance (from 0.05 to 7 pico-Farads) that is dependent on the nature of the gas. IL/MOF based sensors can detect changes in concentrations in the range of 10k-100k ppm in less than a second. Such materials offer countless possibilities to tailor the porosity, chemistry, selectivity, and electrical response to make the sensor suitable to detect the desired analyte.
This poll is no longer accepting votes