Low power mixed gas sensor
| DWPI Title: Low power mixed gas sensor for detecting individual gases in mixed gas streams, comprises electrically insulating substrate, interdigitated electrodes disposed on substrate, mixed-gas-capture film disposed on pair of interdigitated electrodes and substrate |
| Abstract: The invention is directed to a chemically robust, highly-selective, low power sensor that can be used for the direct electrical detection of mixed gases. In particular, metal-organic frameworks (MOFs) offer exceptional chemical and structural tunability as mixed-gas capture materials. As an example of the invention, the influence of interfering gases on trace NO2 detection in a simulated flue gas stream was investigated. The unique interaction of NO2 with the MOF's metal center leads to orders of magnitude decrease in MOF resistance. More broadly, the coadsorption of specific gases (e.g., H2O, SO2) can be beneficial to the electrical detection of the target gas (e.g., NO2), and careful electrical measurements can discern their presence independent of the target gas. |
| Use: Low power mixed gas sensor for detecting individual gases in mixed gas streams. |
| Advantage: The low power mixed gas sensor long lifetimes, low power consumption, and high chemical durability. |
| Novelty: Low power mixed gas sensor comprises an electrically insulating substrate; a pair of interdigitated electrodes disposed on the substrate; a mixed-gas-capture film disposed on the pair of interdigitated electrodes and the substrate; and a frequency response analyzer configured to measure the impedance response of the mixed-gas-capture film when a mixed gas stream is absorbed in the mixed-gas-capture film and an alternating voltage is applied to the pair of interdigitated electrodes. |
| Filed: 1/31/2023 |
| Application Number: US18103617A |
| Tech ID: SD 15672.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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