Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation

Abstract Nanoshells made of a silica core and a gold shell possess an optical response that is sensitive to nanometer-scale variations in shell thickness. The exponential red shift of the plasmon resonance with decreasing shell thickness makes ultrathin nanoshells (less than 10 nm) particularly inte...

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Autores principales:	Laurent Lermusiaux, Marie Plissonneau, Laure Bertry, Glenna L. Drisko, Valérie Buissette, Thierry Le Mercier, Etienne Duguet, Mona Tréguer-Delapierre
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e2d56d1c54bc4badae85e7eb006e29ce
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spelling	oai:doaj.org-article:e2d56d1c54bc4badae85e7eb006e29ce2021-12-02T19:12:33ZSeeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation10.1038/s41598-021-97171-02045-2322https://doaj.org/article/e2d56d1c54bc4badae85e7eb006e29ce2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97171-0https://doaj.org/toc/2045-2322Abstract Nanoshells made of a silica core and a gold shell possess an optical response that is sensitive to nanometer-scale variations in shell thickness. The exponential red shift of the plasmon resonance with decreasing shell thickness makes ultrathin nanoshells (less than 10 nm) particularly interesting for broad and tuneable ranges of optical properties. Nanoshells are generally synthesised by coating gold onto seed-covered silica particles, producing continuous shells with a lower limit of 15 nm, due to an inhomogeneous droplet formation on the silica surface during the seed regrowth. In this paper, we investigate the effects of three variations of the synthesis protocol to favour ultrathin nanoshells: seed density, polymer additives and microwave treatment. We first maximised gold seed density around the silica core, but surprisingly its effect is limited. However, we found that the addition of polyvinylpyrrolidone during the shell synthesis leads to higher homogeneity and a thinner shell and that a post-synthetic thermal treatment using microwaves can further smooth the particle surface. This study brings new insights into the synthesis of metallic nanoshells, pushing the limits of ultrathin shell synthesis.Laurent LermusiauxMarie PlissonneauLaure BertryGlenna L. DriskoValérie BuissetteThierry Le MercierEtienne DuguetMona Tréguer-DelapierreNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Laurent Lermusiaux Marie Plissonneau Laure Bertry Glenna L. Drisko Valérie Buissette Thierry Le Mercier Etienne Duguet Mona Tréguer-Delapierre Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
description	Abstract Nanoshells made of a silica core and a gold shell possess an optical response that is sensitive to nanometer-scale variations in shell thickness. The exponential red shift of the plasmon resonance with decreasing shell thickness makes ultrathin nanoshells (less than 10 nm) particularly interesting for broad and tuneable ranges of optical properties. Nanoshells are generally synthesised by coating gold onto seed-covered silica particles, producing continuous shells with a lower limit of 15 nm, due to an inhomogeneous droplet formation on the silica surface during the seed regrowth. In this paper, we investigate the effects of three variations of the synthesis protocol to favour ultrathin nanoshells: seed density, polymer additives and microwave treatment. We first maximised gold seed density around the silica core, but surprisingly its effect is limited. However, we found that the addition of polyvinylpyrrolidone during the shell synthesis leads to higher homogeneity and a thinner shell and that a post-synthetic thermal treatment using microwaves can further smooth the particle surface. This study brings new insights into the synthesis of metallic nanoshells, pushing the limits of ultrathin shell synthesis.
format	article
author	Laurent Lermusiaux Marie Plissonneau Laure Bertry Glenna L. Drisko Valérie Buissette Thierry Le Mercier Etienne Duguet Mona Tréguer-Delapierre
author_facet	Laurent Lermusiaux Marie Plissonneau Laure Bertry Glenna L. Drisko Valérie Buissette Thierry Le Mercier Etienne Duguet Mona Tréguer-Delapierre
author_sort	Laurent Lermusiaux
title	Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
title_short	Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
title_full	Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
title_fullStr	Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
title_full_unstemmed	Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
title_sort	seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e2d56d1c54bc4badae85e7eb006e29ce
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Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation

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