Surface acoustic wave gas sensors by assembling gas chromatography column

가스 크로마토그래피를 부착한 표면탄성파 가스 센서

  • Published : 2007.01.31


This paper presents characteristics of surface acoustic wave (SAW) gas sensor for detecting volatile gases such as acetone, methanol, and ethanol by measuring phase shift of output signal. A delay-line by combining with a center frequency of 200 MHz was fabricated on S-T Quartz substrates. Using gas chromatography column, the selectivity of the SAW gas sensor were introduced. Experimental results, which show the phase change of output signal under the absorption of volatile gas on sensor surface, were presented. This SAW gas sensor system may be well suited for a high performance electronic nose system.


SAW;quartz;gas chromatography column;gas sensor;phase shift;electronic.nose


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