Odor Sensing and Recognition with Organic Field-Effect Sensors and Circuits
01 January 2001
The vapor or odor sensing characteristics of a large number of organic and polymeric semiconductor-based field-effect sensors are described. We show that such sensors posses selectivity, sensitivity, and reproducibility in recognizing a range of analytes. A variety of mechanisms associated with different semiconductor-analyte pairs offers a wealth of opportunity for chemical recognition. Furthermore, sensor circuit incorporating several devices can be designed which are more sensitive and/or possess other favorable properties. An oscillator sensor circuit is described which has a stronger odor response compared to a discrete device.