Simulation of the optical properties of gold nanoparticles on sodium alginate

In this contribution, we report on the simulation of optical reflectance and transmittance (R&T) taken on a set of gold nanoparticles thin film, deposited on sodium alginate by magnetron sputtering. The gold layer is very thin, so that the films are not continuous and the material is arranged in...

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Autores principales:	Summonte Caterina, Maccagnani Piera, Maurizi Alberto, Pizzochero Giulio, Bolognini Gabriele
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/646d65600092489ca2a284078f699945
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id	oai:doaj.org-article:646d65600092489ca2a284078f699945
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spelling	oai:doaj.org-article:646d65600092489ca2a284078f6999452021-12-02T17:12:51ZSimulation of the optical properties of gold nanoparticles on sodium alginate2100-014X10.1051/epjconf/202125508002https://doaj.org/article/646d65600092489ca2a284078f6999452021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/09/epjconf_eosam2021_08002.pdfhttps://doaj.org/toc/2100-014XIn this contribution, we report on the simulation of optical reflectance and transmittance (R&T) taken on a set of gold nanoparticles thin film, deposited on sodium alginate by magnetron sputtering. The gold layer is very thin, so that the films are not continuous and the material is arranged in nanostructured layers. R&T spectra are simulated using the Generalized Transfer Matrix method applied to the film-on-substrate model. The gold NP films are simulated using the Drude-Lorentz model, by taking into account that the optical function of nanostructured gold exhibits increased collision frequency and reduced relaxation time. Moreover, the signal of localized surface plasmon, evident in the spectra, is simulated by introducing a dedicated modified Lorentz oscillator. The experimental results are well reproduced by the applied model. All trends (amplitude and energy position of the plasmon oscillator, film thickness, relaxation time) are correlated with the deposition parameters. The procedure represents a useful tool in the characterisation of such nanoparticles thin films.Summonte CaterinaMaccagnani PieraMaurizi AlbertoPizzochero GiulioBolognini GabrieleEDP SciencesarticlePhysicsQC1-999ENEPJ Web of Conferences, Vol 255, p 08002 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Summonte Caterina Maccagnani Piera Maurizi Alberto Pizzochero Giulio Bolognini Gabriele Simulation of the optical properties of gold nanoparticles on sodium alginate
description	In this contribution, we report on the simulation of optical reflectance and transmittance (R&T) taken on a set of gold nanoparticles thin film, deposited on sodium alginate by magnetron sputtering. The gold layer is very thin, so that the films are not continuous and the material is arranged in nanostructured layers. R&T spectra are simulated using the Generalized Transfer Matrix method applied to the film-on-substrate model. The gold NP films are simulated using the Drude-Lorentz model, by taking into account that the optical function of nanostructured gold exhibits increased collision frequency and reduced relaxation time. Moreover, the signal of localized surface plasmon, evident in the spectra, is simulated by introducing a dedicated modified Lorentz oscillator. The experimental results are well reproduced by the applied model. All trends (amplitude and energy position of the plasmon oscillator, film thickness, relaxation time) are correlated with the deposition parameters. The procedure represents a useful tool in the characterisation of such nanoparticles thin films.
format	article
author	Summonte Caterina Maccagnani Piera Maurizi Alberto Pizzochero Giulio Bolognini Gabriele
author_facet	Summonte Caterina Maccagnani Piera Maurizi Alberto Pizzochero Giulio Bolognini Gabriele
author_sort	Summonte Caterina
title	Simulation of the optical properties of gold nanoparticles on sodium alginate
title_short	Simulation of the optical properties of gold nanoparticles on sodium alginate
title_full	Simulation of the optical properties of gold nanoparticles on sodium alginate
title_fullStr	Simulation of the optical properties of gold nanoparticles on sodium alginate
title_full_unstemmed	Simulation of the optical properties of gold nanoparticles on sodium alginate
title_sort	simulation of the optical properties of gold nanoparticles on sodium alginate
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/646d65600092489ca2a284078f699945
work_keys_str_mv	AT summontecaterina simulationoftheopticalpropertiesofgoldnanoparticlesonsodiumalginate AT maccagnanipiera simulationoftheopticalpropertiesofgoldnanoparticlesonsodiumalginate AT maurizialberto simulationoftheopticalpropertiesofgoldnanoparticlesonsodiumalginate AT pizzocherogiulio simulationoftheopticalpropertiesofgoldnanoparticlesonsodiumalginate AT bologninigabriele simulationoftheopticalpropertiesofgoldnanoparticlesonsodiumalginate
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Simulation of the optical properties of gold nanoparticles on sodium alginate

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