Low power sensor for NOx detection

DWPI Title: Low power nitrogen oxide sensor, comprises electrically insulating substrate, pair interdigitated electrodes disposed on substrate, nitrogen-oxide-capture film disposed on pair of interdigitated electrodes and substrate, and frequency response analyzer
Abstract: Detection and capture of toxic nitrogen oxides (NOx) is important for emissions control of exhaust gases and general public health. The low power sensor provides direct electrically detection of trace (0.5-5 ppm) NO2 at relatively low temperatures (50° C.) via changes in the electrical properties of nitrogen-oxide-capture active materials. For example, the high impedance of MOF-74 enables applications requiring a near-zero power sensor or dosimeter, such as for smart industrial systems and the internet of things, with 0.8 mg MOF-74 active material drawing <15 pW for a macroscale sensor 35 mm2 area.
Use: Low power nitrogen oxide sensor.
Advantage: The low power nitrogen oxide sensor is effective sensing materials through direct electrical measurements.
Novelty: Low power nitrogen oxide sensor (10) comprises an electrically insulating substrate (13); a pair interdigitated electrodes (12) disposed on the substrate; a nitrogen-oxide-capture film (11) disposed on the pair of interdigitated electrodes and the substrate; and a frequency response analyzer (14) for measuring the impedance response of the nitrogen-oxide-capture film when nitrogen oxide is absorbed in the nitrogen-oxide-capture film and an alternating voltage is applied to the pair of interdigitated electrodes.
Filed: 2/11/2021
Application Number: US17173333A
Tech ID: SD 15672.0
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.
Data from Derwent World Patents Index, provided by Clarivate
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