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Tailoring plasmonic properties of metal nanoparticle-embedded dielectric thin films: the sandwich method of preparation
Published in Springer Netherlands
2017
Volume: 19
   
Issue: 9
Abstract
Tailoring of plasmonic properties of metal nanoparticle-embedded dielectric thin films are very crucial for many thin film-based applications. We, herein, investigate the various ways of tuning the plasmonic positions of gold nanoparticles (AuNPs)-embedded indium oxide thin films (Au:IO) through a sequence-specific sandwich method. The sandwich method is a four-step process involving deposition of In2O3 film by magnetron sputtering in first and fourth steps, thermal evaporation of Au on to In2O3 film in second and annealing of Au/In2O3 film in the third step. The Au:IO films were characterized by x-ray diffraction, spectrophotometry and transmission electron microscopy. The size and shape of the embedded nanoparticles were found from Rutherford back-scattering spectrometry. Based on dynamic Maxwell Garnett theory, the observed plasmon resonance position was ascribed to the oblate shape of AuNPs formed in sandwich method. Finally, through experimental data, it was shown that the plasmon resonance position of Au:IO thin films can be tuned by ~ 125 nm. The method shown here can be used to tune the plasmon resonance position over the entire range of visible region for the thin films made from other combinations of metal-dielectric pair. © 2017, Springer Science+Business Media B.V.
About the journal
JournalData powered by TypesetJournal of Nanoparticle Research
PublisherData powered by TypesetSpringer Netherlands
ISSN13880764
Open AccessNo
Concepts (37)
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    Backscattering
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    Dielectric materials
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    Fiber optic sensors
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    Film preparation
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    Gold
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    High resolution transmission electron microscopy
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    Metal nanoparticles
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    Nanocomposites
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    Nanoparticles
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    Oxide films
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    Plasmons
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    Resonance
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    RUBIDIUM
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    Surface plasmon resonance
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    Thermal evaporation
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    Transmission electron microscopy
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    X ray diffraction
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    Gold nanoparticles
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    LSPR
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    Plasmonic
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    SANDWICH METHODS
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    TAILORING
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    Thin films
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    Gold nanoparticle
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    Indium tin oxide
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    Metal nanoparticle
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    Analytic method
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    Article
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    Controlled study
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    DIELECTRIC THIN FILM
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    Evaporation
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    Film
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    Microwave oven
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    Priority journal
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    SANDWICH METHOD
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    Spectrometry
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    Spectrophotometry