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수정진동자에 의한 Langmuir-Blodgett(LB) 누적막의 평가
권영수,장상목,김기완 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1
AT-cut quartz crystals and SAW devices were applied as immunosensors and chemical vapour sensors coated with PG, PI, PE, PS and lipid A were useful for determine of amylacetate, acetoin, menthone and other organic vapours, which showed different affinities for each lipid. We conducted that the key problems of our sensor system for practical application are life time and reproducibility from our results. The most important points are chemical instability of natural lipid materials and randomness of coating method. In this paper, we combined an artificial lipid with a piezoelectric crystal in order to improve stability of our sensor. LB technique was applied to produce uniform lipid layers on the crystals. Relationships between frequency change and number of LB layers are also discussed.
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수정진동자를 이용한 고분자 감응성막의 유기가스 응답특성
권영수,김정명,유승엽,장상목,김영한 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
It is very useful to use piezoelectric device as transducer of gas sensor. AT-cut quartz crystal with 9 MHz resonant frequency can precisely measure about 1 nanogram as mass sensitivity. There are two different type of Gas sensor. One is the gas sensor coated with functional films which has selectivity to gas. The other is to use pattern recognition and array of quartz crystal with different coating materials, which don't have any selectivity to organic gases. In this paper, we used polymers as coating materials, which has thermal and mechanical stability and investigated the possibility of pattern recognition using new parameter in flow system. Our purpose is to develope gas sensor using pattern recognition and neural network.
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