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Ag-AgO nanostructures on glass substrates by solid-state dewetting: From extended to localized surface plasmons

AuthorsSerrano Rubio, Aída ; Llorca-Hernando, O.; Campo, Ángel Adolfo del ; Rubio Marcos, Fernando ; Rodríguez de la Fuente, Oscar; Fernández Lozano, José Francisco ; García García-Tuñón, Miguel Ángel
KeywordsSurface plasmons
Thin film
Issue Date2018
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 124: 1 (2018)
Abstract[EN] We present here a study on the modification of morphological and plasmonic properties of Ag thin films deposited on glass substrates upon annealing in air at different temperatures. Initially, Ag films are continuous and exhibit extended surface plasmons with a resonant absorbance that depends on the film thickness. The dewetting process promotes the formation of nanoparticles with different sizes, shapes, and agglomerations states, besides a partial oxidation from Ag to AgO at surface level. The final Ag-AgO nanostructures are dependent on the annealing temperature and initial film thickness. The optical properties evolve from those typical of metallic films with high reflectivity and extended surface plasmon resonance toward localized surface plasmons characteristic of nanoparticles. The optical evolution and the final plasmonic response are evaluated according to the morphological and structural features of nanostructures.
Publisher version (URL)http://dx.doi.org/10.1063/1.5049651
Identifiersdoi: 10.1063/1.5049651
e-issn: 1089-7550
issn: 0021-8979
Appears in Collections:(ICV) Artículos
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