Abstract
Abstract A novel biosensor device on the basis of a FET (field-effect transistor)–insect antenna junction is presented. This biosensor allows the quantitative detection of specific components of host plant odours. The sensor was operated at a fixed working point in the constant voltage mode. As a test odour the gas concentration of Z-3-hexen-1-ol was determined in the concentration range from 0.01 to 100 ppm with short response time of less than 1 s and a high reversibility of the sensor signal in ambient air. Two types of preparation of the biocomponent were examined yielding a whole-beetle-BioFET and an isolated-antenna-BioFET.
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