Study of Stability of Sensing Film Odor Sensing System(Special Issue on Organic Materials for Optics and Electronics)

概要

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Since the development of odor sensing system is required in many fields, we have been developing the system using QCM(Quartz Crystal Microbalance, 10MHz AT-cut)array and neural-network pattern recognition. Since it is important to obtain stable sensor responses, a sensing film of lipid blended with PVC(polyvinyl chloride)was studied here. First, we studied the stability of various sensing films e.g., phospholipids, GC liquid stationary phase materials and others in odor sensing system. It was found that most of lipids were stable, while PEG 200, octadecane and DBP were not stable materials. Second, we studied to obtain a stable QCM sensor using a sensing film blended with PVC. 4 plasticizers blended with PVC were systematically characterized, analyzing the pattern of QCM sensor responses by multivariate analysis. It was found that the pattern of DOPP was very different from that of PVC. Thus, we adopted DOPP as plasticizer and the stable sensor response was obtained using a lipid film blended with both PVC and DOPP. Finally, we studied the influence of sensing film materials on the stability of QCM sensors. It was found that the loss of sensing film mass after many vapor exposures depended upon the molecular weight.
社団法人電子情報通信学会の論文
1998-07-25