Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/55863

TítuloDevelopment of Au/CuO nanoplasmonic thin films for sensing applications
Autor(es)Proença, Maria Manuela Carvalho
Borges, Joel Nuno Pinto
Rodrigues, Marco S.
Domingues, R. P.
Dias, J. P.
Trigueiro, J.
Bundaleski, N.
Teodoro, O. M. N. D.
Vaz, F.
Palavras-chaveAu nanoparticles
CuO
Localized surface plasmon resonance
Magnetron sputtering
Thin films
Data15-Jun-2018
EditoraElsevier B.V.
RevistaSurface and Coatings Technology
CitaçãoProença, M., Borges, J., Rodrigues, M. S., Domingues, R. P., Dias, J. P., Trigueiro, J., ... & Vaz, F. (2018). Development of Au/CuO nanoplasmonic thin films for sensing applications. Surface and Coatings Technology, 343, 178-185
Resumo(s)Nanocomposite thin films, containing Au nanoparticles dispersed in a CuO matrix, were prepared by reactive DC magnetron sputtering and post-deposition thermal annealing. The CuO matrix was found to be stoichiometric and the atomic concentration of Au was determined to be about 12.3 at.%. After the annealing process, the average size of the crystalline domains of the Au nanoparticles (fcc structure) increased from about 6 nm (at an annealing temperature of 300 °C) to approximately 13 nm (after annealing at 800 °C), with a progressive crystallization of the CuO matrix in the monoclinic structure. A nanoplasmonic effect due to the localized surface plasmon resonance (LSPR) phenomenon appeared in the films after annealing temperatures of 400 °C and higher. The correspondent LSPR bands appeared in the visible range of the transmittance spectra, becoming progressively narrower. Angle Resolved X-ray Photoelectron Spectroscopy results indicated that the surface of Au/CuO nanocomposite thin film is contaminated with a sub-nanometric layer (~ 0.6 nm) of hydrocarbons and that the Au nanoparticles are relatively homogenously dispersed inside the CuO dielectric matrix. Furthermore, the results seem also to indicate that the Au nanoparticles are covered with about 0.2 nm of CuO. Although further studies need to be performed to make clear the particular features of the present nanocomposite thin films’ system, this work shows promising results concerning some particular applications that are envisaged, namely their use as LSPR sensing platforms for particular molecules detection (e.g. gases).
Tipoarticle
URIhttp://hdl.handle.net/1822/55863
DOI10.1016/j.surfcoat.2017.08.033
ISSN0257-8972
Versão da editorahttps://www.sciencedirect.com/science/article/pii/S0257897217308319
Arbitragem científicayes
AcessorestrictedAccess
Aparece nas coleções:CDF - GRF - Artigos/Papers (with refereeing)

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