Selective plasmonic gas sensing: H2, NO2, and CO spectral discrimination by a single Au-CeO2 nanocomposite film

Analytical Chemistry
Nicholas A JoyMichael A Carpenter

Abstract

A Au-CeO(2) nanocomposite film has been investigated as a potential sensing element for high-temperature plasmonic sensing of H(2), CO, and NO(2) in an oxygen containing environment. The CeO(2) thin film was deposited by molecular beam epitaxy (MBE), and Au was implanted into the as-grown film at an elevated temperature followed by high temperature annealing to form well-defined Au nanoclusters. The Au-CeO(2) nanocomposite film was characterized by X-ray diffraction (XRD) and Rutherford backscattering spectrometry (RBS). For the gas sensing experiments, separate exposures to varying concentrations of H(2), CO, and NO(2) were performed at a temperature of 500 °C in oxygen backgrounds of 5.0, 10, and ∼21% O(2). Changes in the localized surface plasmon resonance (LSPR) absorption peak were monitored during gas exposures and are believed to be the result of oxidation-reduction processes that fill or create oxygen vacancies in the CeO(2). This process affects the LSPR peak position either by charge exchange with the Au nanoparticles (AuNPs) or by changes in the dielectric constant surrounding the particles. Spectral multivariate analysis was used to gauge the inherent selectivity of the film between the separate analytes. From princ...Continue Reading

References

Jul 6, 2001·Journal of the American Chemical Society·K SohlbergS J Pennycook
Jul 11, 2006·The Journal of Physical Chemistry. B·George SirinakisMichael A Carpenter
Nov 26, 2009·Science·Elin M LarssonBengt Kasemo

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Citations

Jul 18, 2015·Sensors·Enrico Della Gaspera, Alessandro Martucci
Jun 28, 2016·ACS Applied Materials & Interfaces·Yao YaoShengzhong Frank Liu
Dec 6, 2012·Beilstein Journal of Nanotechnology·Gnanaprakash DharmalingamMichael A Carpenter
Apr 25, 2020·Physical Chemistry Chemical Physics : PCCP·Adam H ClarkGopinathan Sankar
Feb 26, 2020·ACS Applied Materials & Interfaces·Kaiping YuanDavid Wei Zhang
Nov 27, 2014·ACS Nano·Carl WadellChristoph Langhammer
Oct 4, 2014·ACS Nano·Nicholas KarkerMichael A Carpenter
Nov 8, 2012·Analytical Chemistry·Nicholas A JoyMichael A Carpenter
Sep 13, 2021·Chemistry, an Asian Journal·L KeerthanaGnanaprakash Dharmalingam

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