In biological systems odorants are received by a large number of receptors. In the process of the reception, not whole structures but partial structures of molecules are recognized, and it is referred that the odor quality is recognized depending upon their combinations. In this research, paying attention to the process of human odor reception in which these receptors detect many odorant molecules with multi modal interactions, the development of a novel odor sensing system had been attempted. Utilizing surface polarity controlling method as a transducer of the sensor, many odorant molecules were detected through interaction on the surface of the electrode. Paying attention to alcohols, aromatic compounds and aromatic alcohols as odorants, the discrimination of their responses by similar molecular structures was attempted. As a result, output patterns of this sensor were reflected by partial structures of odorant molecules, and it became possible to evaluate odorants by them.
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