Abstract
AbstractOdor classifying gas sensors will be useful in many applications, such as gas detection alarms, process controls for food production, and so on. We have tried to realize a sensor using the transient responses of semiconductor gas sensors consisting of tin dioxide and have shown that the sensors gave different transient responses for different gases. Model calculations showed that the activation energy of chemical reactions on the sensor surface depends strongly on the transient response. We tried to estimate the activation energies by molecular orbital calculations for a SnO2 cluster. The results showed that there is a linear relationship between the gradient of the transient response and the activation energy for carboxylic acid and alcohol vapors. The transient response will be predictable from the activation energy of each gas, and odor discrimination by a single semiconductor gas sensor will be possible using this relationship. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(5): 11–16, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11475
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