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- W50142434 abstract "Chemical sensors using interactive sorptive materials typically involve a ''two-step'' response mechanism. While the sorptive material collects and concentrates gas phase molecules, the device on which it has been applied transduces the presence of these sorbed molecules into an analytical signal. Usually, the sorptive material is a thin film and the device is a microfabricated structure, although other configurations exist. The film of a sorptive material is often referred to as the ''selective layer''. This general concept for gas phase chemical sensing is shown. The selective layer on a gas phase chemical microsensor plays a critical role in the sensitivity and selectivity of the sensor's response. Polymers can rapidly and reversibly absorb vapor molecules. As sorptive layers on chemical sensors, polymers are useful for a variety of chemical microsensor types and transduction mechanisms, either as is or as composites with conductive particles or dyes. The performance requirements for polymers are described in terms of their chemical and physical properties. A versatile synthetic approach for preparing sensing polymers has been developed using hydrosilylation chemistry to prepare carbosiloxane polymers. Polymers with diverse chemical selectivities have been prepared by this method. Furthermore, sorptive polymer materials can be photopatterned into defined areas on surfacesmore » using a photoactivated catalyst and hydrosilylation chemistry. Polymer films with diverse chemical selectivities have been patterned with this new method.« less" @default.
- W50142434 created "2016-06-24" @default.
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- W50142434 date "2002-12-10" @default.
- W50142434 modified "2023-10-16" @default.
- W50142434 title "Sorptive Polymers and Photopatterned Films for Gas Phase Chemical Microsensors and Arrays" @default.
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- W50142434 doi "https://doi.org/10.2172/15010066" @default.
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