Surface plasmon resonance gas sensors using Au-WO3-x nanocomposite films

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Proceedings titleSENSORCOMM '08 Proceedings
ConferenceThe Second International Conference of Sensor Technologies and Applications, August 25-31 2008, Cap Esterel
Pages378383; # of pages: 6
SubjectAu-WO3-x; metal nanoparticles; metal-dielectric composite films; nanocomposite thin films; pulsed laser deposition; surface plasmon resonance gas sensors
AbstractSurface plasmon resonance (SPR) of metal-dielectric composite films formed by noble metal nanoparticles embedded in a dielectric is very sensitive to the changes in the refractive index of the dielectric induced by physical absorption or chemical reactions and is therefore exploited for gas sensing applications. In this study, Au-WO3-x nanocomposite thin films were fabricated by pulsed laser deposition and the content of Au in the composite films was varied by altering the relative laser ablation time on Au and WO3 targets. The SPR response of the Au-WO3-x films in ambient atmosphere is measured for various gold percentages. The experimental results were compared to the theoretical calculations by both Maxwell-Garnett and Bruggeman effective medium theories. The SPR response of Au-WO3-x films exposed to NO gas was measured. The preliminary results indicated that gas sensing using the SPR responses of metal-dielectric composite films is feasible.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21274318
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Record identifier3fcd6d26-94ae-44e8-a201-ddb9ffbffc7a
Record created2015-03-09
Record modified2016-05-09
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