Whereas the close associations of cesium ion with organochlorine compounds have been previously documented, the present report is the first attempt to exploit these interactions to create a trichloroethylene (TCE)-selective sensor. Gold monolayer-protected clusters peripherally functionalized with Cs ions were used to prepare a chemiresistance film on MEMS-fabricated interdigitated electrodes. Vapor sensing properties of the cesium-rich chemiresistor were determined using a panel of chlorinated hydrocarbons including TCE as well as polar and non-polar VOCs for comparison. The sensor was selective and highly sensitive toward VOCs containing a 1,2-dichloro group at concentrations as low as 0.1 ppm. The results suggest the key interaction contributing to sensor response is a bidentate, metallocycle-like coordination of the 1,2-dichloro group to the cesium cations at the sensor surface.

中文翻译：

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铯离子引导检测空气中的三氯乙烯

虽然铯离子与有机氯化合物的密切联系先前已被记录，但本报告是首次尝试利用这些相互作用来创建三氯乙烯（TCE）选择性传感器。使用 Cs 离子外围功能化的金单层保护簇在 MEMS 制造的叉指电极上制备化学电阻膜。富铯化学电阻器的蒸汽传感特性是使用一组氯化烃（包括 TCE）以及极性和非极性 VOC 来确定的，以进行比较。该传感器对浓度低至 0.1 ppm 的含有 1,2-二氯基团的 VOC 具有选择性且高度敏感。结果表明，有助于传感器响应的关键相互作用是 1,2-二氯基团与传感器表面铯阳离子的双齿、类金属环配位。