Devices and methods to detect and quantify trace gases
| DWPI Title: Sensing device for detecting presence of chemical analyte in gaseous carrier, has adsorption of chemical analyte by porous coordination polymer (PCP) that causes mass changes in PCP that dampens propagation of standing acoustic wave |
| Abstract: Sensing devices based on a surface acoustic wave (“SAW”) device coated with an absorbent crystalline or amorphous layer for detecting at least one chemical analyte in a gaseous carrier. Methods for detecting the presence of a chemical analyte in a gaseous carrier using such devices are also disclosed. The sensing devices and methods for their use may be configured for sensing chemical analytes selected from the group consisting of water vapor, carbon dioxide, methanol, ethanol, carbon monoxide, nitric oxide, nitrous oxide, organic amines, organic compounds containing NO2 groups, halogenated hydrocarbons, acetone, hexane, toluene, isopropanol, alcohols, alkanes, alkenes, benzene, functionalized aromatics, ammonia (NH3), phosgene (COCl2), sulfur mustard, nerve agents, sulfur dioxide, tetrahydrofuran (THF) and methyltertbutyl ether (MTBE) and combinations thereof. |
| Use: Surface acoustic wave sensor device for detecting presence of chemical analyte in gaseous carrier. |
| Advantage: The sensor device is simple and robust, and low cost, and provides relative ease of coating, and are capable of generating large signals from small quantities of targeted analytes. The surface acoustic wave are a convenient platform for evaluating metal organic framework coatings for gas sensing and are suited for practical use as well. |
| Novelty: The sensing device has surface acoustic wave sensor device (100) that has one surface, and an absorbent layer bonded to the one surface of the surface acoustic wave sensor device. The absorbent layer is made up of PCP having a porous structure, in which adsorption of a chemical analyte by the PCP causes mass changes in the PCP that dampens propagation of a standing acoustic wave through the surface acoustic wavesensor device during propagation, thus, signaling a presence of the chemical analyte, in which the PCP is covalently bonded to the surface acoustic wave sensor device. |
| Filed: 10/2/2012 |
| Application Number: US13633772A |
| Tech ID: SD 12148.1 |
| 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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