Selective optical detection of H₂ and CO with SiO₂ sol gel films containing NiO and Au nanoparticles

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DOIResolve DOI: http://doi.org/10.1088/0957-4484/18/47/475505
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TypeArticle
Journal titleNanotechnology
Volume18
Issue47
Pages475505-1475505-7; # of pages: 7
AbstractNiO is a p-type semiconductor widely studied for its promising implementation in chemo-optical gas sensors. Reducing/oxidizing gases induce a change in optical absorption of NiO. It has been found that Au doping induces a remarkable increase in the NiO sensitivity, and at the same time silica films obtained by the sol–gel technique have been demonstrated to be a suitable support matrix for gas-sensitive materials due to their extremely high specific surface area (up to 600 m² g⁻¹). The aim of this work is the synthesis of SiO₂ films containing both NiO and Au nanoparticles and their morphological and functional characterization as active gas-sensing materials suitable for optical detectors. The possibility to selectively recognize H2 and CO is studied exploiting the wavelength dependence of the gas-induced optical transmittance variation.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52163
NPARC number15552655
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Record identifier68b5ae82-4d82-44b2-894b-c5337f4d2616
Record created2010-06-10
Record modified2016-05-09
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