Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing

Manuela Proença, Joel Borges, Marco S. Rodrigues, Diana I. Meira, Paula Sampaio, João P. Dias, Paulo Pedrosa, Nicolas Martin, Nenad Bundaleski, Orlando M. N. D. Teodoro, Filipe Vaz

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nanocomposite thin films, composed of monometallic Au and Ag, and bimetallic Au[sbnd]Ag nanoparticles, dispersed in a CuO matrix were prepared, characterised and tested for Localized Surface Plasmon Resonance (LSPR) sensing. The films were deposited by reactive magnetron sputtering, followed by a post-deposition thermal annealing to modify the size and shape of the nanoparticles distribution within the oxide matrix. Regarding the main results of the monometallic systems, the Au:CuO films showed LSPR bands from 800 nm to 650 nm, which reveal a progressive narrowing and a continuous blue-shift with increasing temperature (400–700 °C). The Ag:CuO films evidenced plasmonic bands at about 400 nm for temperatures of 500 °C and above. The bimetallic system, Au-Ag:CuO, showed LSPR bands in the range between those of the corresponding monometallic systems, due to the presence of Ag enriched Au[sbnd]Ag alloy nanoparticles, taking part of Janus-like structures in some cases. In terms of LSPR sensing, Au:CuO films revealed the highest values of refractive index sensitivity since the nanoparticles are more exposed to the surrounding environment.

Original languageEnglish
Pages (from-to)152-168
Number of pages17
JournalApplied Surface Science
Volume484
DOIs
Publication statusPublished - 1 Aug 2019

Fingerprint

Nanocomposite films
Surface plasmon resonance
Nanoparticles
Thin films
Reactive sputtering
Magnetron sputtering
Oxides
Refractive index
Annealing
Temperature

Keywords

  • CuO matrix
  • Localized surface plasmon resonance
  • Magnetron sputtering deposition
  • Microstructure
  • Nanoparticles
  • Thin films

Cite this

Proença, Manuela ; Borges, Joel ; Rodrigues, Marco S. ; Meira, Diana I. ; Sampaio, Paula ; Dias, João P. ; Pedrosa, Paulo ; Martin, Nicolas ; Bundaleski, Nenad ; Teodoro, Orlando M. N. D. ; Vaz, Filipe. / Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing. In: Applied Surface Science. 2019 ; Vol. 484. pp. 152-168.
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title = "Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing",
abstract = "Nanocomposite thin films, composed of monometallic Au and Ag, and bimetallic Au[sbnd]Ag nanoparticles, dispersed in a CuO matrix were prepared, characterised and tested for Localized Surface Plasmon Resonance (LSPR) sensing. The films were deposited by reactive magnetron sputtering, followed by a post-deposition thermal annealing to modify the size and shape of the nanoparticles distribution within the oxide matrix. Regarding the main results of the monometallic systems, the Au:CuO films showed LSPR bands from 800 nm to 650 nm, which reveal a progressive narrowing and a continuous blue-shift with increasing temperature (400–700 °C). The Ag:CuO films evidenced plasmonic bands at about 400 nm for temperatures of 500 °C and above. The bimetallic system, Au-Ag:CuO, showed LSPR bands in the range between those of the corresponding monometallic systems, due to the presence of Ag enriched Au[sbnd]Ag alloy nanoparticles, taking part of Janus-like structures in some cases. In terms of LSPR sensing, Au:CuO films revealed the highest values of refractive index sensitivity since the nanoparticles are more exposed to the surrounding environment.",
keywords = "CuO matrix, Localized surface plasmon resonance, Magnetron sputtering deposition, Microstructure, Nanoparticles, Thin films",
author = "Manuela Proen{\cc}a and Joel Borges and Rodrigues, {Marco S.} and Meira, {Diana I.} and Paula Sampaio and Dias, {Jo{\~a}o P.} and Paulo Pedrosa and Nicolas Martin and Nenad Bundaleski and Teodoro, {Orlando M. N. D.} and Filipe Vaz",
note = "This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2019; and by the projects NANOSENSING, POCI-01-0145-FEDER-016902 , with FCT reference PTDC/FIS-NAN/1154/2014; and NANO4BIO, POCI-01-0145-FEDER-032299 , with FCT reference PTDC/FIS-MAC/32299/2017. Manuela Proen{\cc}a acknowledges her PhD grant from FCT, with reference SFRH/BD/137076/2018. Joel Borges acknowledges FCT for his Post-Doc grant SFRH/BPD/117010/2016. Marco S. Rodrigues acknowledges FCT for his PhD grant with reference SFRH/BD/118684/2016.",
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Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing. / Proença, Manuela; Borges, Joel; Rodrigues, Marco S.; Meira, Diana I.; Sampaio, Paula; Dias, João P.; Pedrosa, Paulo; Martin, Nicolas; Bundaleski, Nenad; Teodoro, Orlando M. N. D.; Vaz, Filipe.

In: Applied Surface Science, Vol. 484, 01.08.2019, p. 152-168.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing

AU - Proença, Manuela

AU - Borges, Joel

AU - Rodrigues, Marco S.

AU - Meira, Diana I.

AU - Sampaio, Paula

AU - Dias, João P.

AU - Pedrosa, Paulo

AU - Martin, Nicolas

AU - Bundaleski, Nenad

AU - Teodoro, Orlando M. N. D.

AU - Vaz, Filipe

N1 - This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2019; and by the projects NANOSENSING, POCI-01-0145-FEDER-016902 , with FCT reference PTDC/FIS-NAN/1154/2014; and NANO4BIO, POCI-01-0145-FEDER-032299 , with FCT reference PTDC/FIS-MAC/32299/2017. Manuela Proença acknowledges her PhD grant from FCT, with reference SFRH/BD/137076/2018. Joel Borges acknowledges FCT for his Post-Doc grant SFRH/BPD/117010/2016. Marco S. Rodrigues acknowledges FCT for his PhD grant with reference SFRH/BD/118684/2016.

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Nanocomposite thin films, composed of monometallic Au and Ag, and bimetallic Au[sbnd]Ag nanoparticles, dispersed in a CuO matrix were prepared, characterised and tested for Localized Surface Plasmon Resonance (LSPR) sensing. The films were deposited by reactive magnetron sputtering, followed by a post-deposition thermal annealing to modify the size and shape of the nanoparticles distribution within the oxide matrix. Regarding the main results of the monometallic systems, the Au:CuO films showed LSPR bands from 800 nm to 650 nm, which reveal a progressive narrowing and a continuous blue-shift with increasing temperature (400–700 °C). The Ag:CuO films evidenced plasmonic bands at about 400 nm for temperatures of 500 °C and above. The bimetallic system, Au-Ag:CuO, showed LSPR bands in the range between those of the corresponding monometallic systems, due to the presence of Ag enriched Au[sbnd]Ag alloy nanoparticles, taking part of Janus-like structures in some cases. In terms of LSPR sensing, Au:CuO films revealed the highest values of refractive index sensitivity since the nanoparticles are more exposed to the surrounding environment.

AB - Nanocomposite thin films, composed of monometallic Au and Ag, and bimetallic Au[sbnd]Ag nanoparticles, dispersed in a CuO matrix were prepared, characterised and tested for Localized Surface Plasmon Resonance (LSPR) sensing. The films were deposited by reactive magnetron sputtering, followed by a post-deposition thermal annealing to modify the size and shape of the nanoparticles distribution within the oxide matrix. Regarding the main results of the monometallic systems, the Au:CuO films showed LSPR bands from 800 nm to 650 nm, which reveal a progressive narrowing and a continuous blue-shift with increasing temperature (400–700 °C). The Ag:CuO films evidenced plasmonic bands at about 400 nm for temperatures of 500 °C and above. The bimetallic system, Au-Ag:CuO, showed LSPR bands in the range between those of the corresponding monometallic systems, due to the presence of Ag enriched Au[sbnd]Ag alloy nanoparticles, taking part of Janus-like structures in some cases. In terms of LSPR sensing, Au:CuO films revealed the highest values of refractive index sensitivity since the nanoparticles are more exposed to the surrounding environment.

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