Design of an efficient measurement cell for characterizing sensing properties of nanostructured sensitive layers coated on chips

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• 作者：Karine Bonnot^a ; ^{karine.bonnot@isl.eu}  ; [Author Vitae] ; Benny Siegert^a  ; [Author Vitae] ; Thomas Cottineau^b  ; [Author Vitae] ; Valé ; rie Keller^b  ; [Author Vitae] ; Denis Spitzer^a  ; [Author Vitae]
• 关键词：Detection ; Explosives ; Lab-on-chip ; Sensors ; Validation
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：20 May, 2012
• 卷：166-167
• 期：Complete
• 页码：829-832
• 文件大小：507 K

摘要

In the domain of defense and security, there is a strong need to develop more sensitive and selective sensors for explosive traces. This involves testing of sensing systems. We designed an efficient flow cell, coupled to explosive-vapors generation in ultra-trace amounts and to downstream analysis of the concentration by Fast GC/ECD. This test bench is a tool for characterizing the adsorption behavior of sensing layers coated on chips, without any in situ readout. The laminar gas flow over the chip surface ensures a highly reliable operation. The performance of the system has been assessed using non-adsorbing and adsorbing material samples. The system allows the precise evaluation of sensing layers for the development of extremely sensitive detector systems.