Colloidal metal-insulator-metal ensemble chemiresistor sensor

被引：383

作者：

Wohltjen, H

Snow, AW

机构：

[1] Microsensor Syst Inc, Bowling Green, KY 42103 USA

[2] USN, Res Lab, Washington, DC 20375 USA

来源：

ANALYTICAL CHEMISTRY | 1998年 / 70卷 / 14期

关键词：

D O I：

10.1021/ac9713464

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A colloidal metal-insulator-metal ensemble chemiresistor sensor based on a monolayer stabilized metal nanocluster transducer film is described. In the example presented, the thin transducer film is composed of 2-nm gold clusters encapsulated by octanethiol monolayers and is deposited on an interdigital microelectrode. Responses to organic vapor exposures are large (resistance changes up to 2-fold or more), fast (90% response in less than 1 s), reversible, and selective. Chemiresistor sorption isotherms for toluene, tetrachloroethylene, l-propanol, and water vapors are: nonlinear and illustrate the high sensitivity and selectivity (ppm detection for toluene and tetrachloroethylene; negligible response for l-propanol and water).

引用

收藏

页码：2856 / 2859

页数：4

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