Visual Indicator for Trace Organic Volatiles

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• 作者：Neal A. Rakow ; Michael S. Wendland ; John E. Trend ; Richard J. Poirier ; Dora M. Paolucci ; Stephen P. Maki ; Christopher S. Lyons ; Mary J. Swierczek
• 刊名：Langmuir
• 出版年：2010
• 出版时间：March 16, 2010
• 年：2010
• 卷：26
• 期：6
• 页码：3767-3770
• 全文大小：815K
• 年卷期：v.26,no.6(March 16, 2010)
• ISSN：1520-5827

文摘

We describe herein a novel approach for visual indication of trace organic vapors. The sensor utilizes a microporous material within a visual thin film transducer to produce changes in color upon exposure to a very wide range of volatile organic compounds. Visual indication at 5 parts per million (ppm) is demonstrated, with optoelectronic detection achieved to below 50 parts per billion (ppb). Through a thoughtful design of the sensor, we are able to avoid interference from water vapor, a critical attribute needed for practical application.