Selectivity enhancement of p-type semiconducting hydrocarbon sensors - the use of sol-precipitated nano-powders

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DOIResolve DOI: http://doi.org/10.1016/j.snb.2007.09.024
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TypeArticle
Journal titleSensors and Actuators B: Chemical
Volume130
Issue1
Pages470476; # of pages: 7
SubjectSol precipitation; Zeolite; Pulsed laser deposition; Hydrocarbon sensor; Sr(Ti₀.₈Fe₀.₂)O₃-δ
AbstractA method for preparing sol-precipitated Sr(Ti₀.₈Fe₀.₂)O₃−δ powders yielding particle sizes of about 70 nm is presented. Screen-printed films based on such nano-scaled powders are compared and contrasted to conventional micro-scaled thick films. By employing sol-precipitated powders, the hydrocarbon sensitivity of the sensor devices is improved. For unsaturated hydrocarbons, resistance changes similar to those of thin films prepared by pulsed laser deposition are observed, thus combining the fast sensor response of Sr(Ti₀.₈Fe₀.₂)O₃−δ thick films with the high response (R/R₀) values observed for thin films. The pronounced cross-interference of NO and CO can be eliminated by means of an additional zeolite layer deposited on top of the nano-scaled sensor film.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
NRC number51935
NPARC number14299048
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Record identifierbe4afc42-8820-45ce-bda5-f953ce193796
Record created2010-02-08
Record modified2016-05-09
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