title: Distinction of gases with a semiconductor sensor depending on the scanning profile of a cyclic temperature.
abstract: A gas-sensing system based on a dynamic nonlinear response is reported to improve the selectivity in the sensor response toward sample gases. A cyclic temperature composed of fundamental and second harmonics was applied to a SnO(2) semiconductor gas sensor and the resulting conductance of the sensor was analyzed by fast Fourier transformation (FFT). The dynamic nonlinear responses to the gas species were further characterized depending on the scanning profile of the temperature. These characteristic sensor responses under the application of second-harmonic perturbation were theoretically considered based on a reaction-diffusion model for the semiconductor surface.
authors.affiliation: Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan. nakatas@nara-edu.ac.jp
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakata
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Okunishi
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Nakashima
mesh_terms: D004563:Electrochemistry; D004784:Environmental Monitoring / Q000379:methods; D005740:Gases / Q000032:analysis*; D012666:Semiconductors; D013696:Temperature
chemical_list: D005740:Gases