Gold nanoparticle-doped TiO₂ semiconductor thin films : Gas sensing properties

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DOIResolve DOI: http://doi.org/10.1002/adfm.200800864
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TypeArticle
Journal titleAdvanced Functional Materials
Volume18
Issue23
Pages38433849; # of pages: 7
AbstractTiO₂ sol–gel films doped with gold nanoparticles are used as both optical and conductometric sensors for the detection of CO and H₂. Tests performed at 360°C show for the first time CO- and H₂-induced reversible variations in the optical absorption of thin TiO₂/Au sol–gel films. The absorbance changes are strongly dependent on both the testing wavelength and the film microstructure. Together with the sensing dynamics observed through an electric interface, it is possible to obtain a better understanding of the mechanisms involved in the detection of both gases. The presence of H₂ elicits almost ideal, step-like dynamic responses using conductometric detection.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number51986
NPARC number14567245
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Record identifiera284d4e0-adb2-49fb-ae81-a29d2c724e5d
Record created2010-03-19
Record modified2016-05-09
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