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김기영,김종민,권영수,이범종,장용근,김종득,장상목 ( Ki Young Kim,Jong Min kinm,Yung Soo Kwon,Burm Jong Lee,Yong keun Chang,Jong Deuk Kim,Sang Mok Chang ) 한국센서학회 1994 센서학회지 Vol.3 No.2
The use of preformed polymers and their cross-linking has been attempted in order to improve the intrinsic fragility of monolayers and Langmuir-Blodgett(LB) films. The evaluation of the characteristics of the LB multi-layer by using an AT-cut quartz crystal has been also attempted. This study reveals that the polyether pendants of 2C18VE3 lie at thee air-water interface at low surface pressures and are forced down into the subphase when the monolayers are compressed. This characteristic behavoir of the pendant polyethers is very clear on aqueous poly allyl amine(PAA) and is also observeable on saturated aqueous NaCl and CaCl₂. And the characteristics of LB multi-layers could be evaluated by using AT-cut quartz crystal in situ .
김기영,김종민,함영환,장용근,김종득,장상목 ( Ki Young Kim,Jong Min Kim,Young Hwan Ham,Yong Keun Chang,Jong Deuk Kim,Sang Mok Cahang ) 한국센서학회 1994 센서학회지 Vol.3 No.2
A quartz crystal microbalance (QCM) sensor system for the detection of odorants, especially environmental pollutant, has been constructed by depositing various phospholipids, activated carbon and lead compound pigment onto the surface of the QCM. The characteristics of a QCM operating at 9 MHz deposited with phosphatidyl- choline were analysed. An explanation is given for different odorant affinities based on the monolayer properties of phospholipids. The identification of odorants is discussed in terms of a comparison of their normalized resonant frequency shift patterns and relative response intensities calculated from the response areas. Applying the lead compound pigment coated QCM, it was possible to detect sulfur compound specifically. Using a number of different lipid-coated QCMs, odorants could be identified by comparing the response patterns.
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.