Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures

To study the distance-dependent electromagnetic field effects related to the enhancement and quenching mechanism of surface-enhanced Raman scattering (SERS) or fluorescence, it is essential to precisely control the distance from the surface of the metal nanoparticle (NP) to the target molecule by us...

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Autores principales:	Eunil Hahm, Ahla Jo, Eun Ji Kang, Sungje Bock, Xuan-Hung Pham, Hyejin Chang, Bong-Hyun Jun
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	silica shell fine control shell thickness assembled structures Biology (General) QH301-705.5 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7a13780e2bac48a488474d57cfdd6a83
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spelling	oai:doaj.org-article:7a13780e2bac48a488474d57cfdd6a832021-11-11T17:24:13ZUltra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures10.3390/ijms2221119831422-00671661-6596https://doaj.org/article/7a13780e2bac48a488474d57cfdd6a832021-11-01T00:00:00Zhttps://www.mdpi.com/1422-0067/22/21/11983https://doaj.org/toc/1661-6596https://doaj.org/toc/1422-0067To study the distance-dependent electromagnetic field effects related to the enhancement and quenching mechanism of surface-enhanced Raman scattering (SERS) or fluorescence, it is essential to precisely control the distance from the surface of the metal nanoparticle (NP) to the target molecule by using a dielectric layer (e.g., SiO<sub>2</sub>, TiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub>). However, precisely controlling the thickness of this dielectric layer is challenging. Herein, we present a facile approach to control the thickness of the silica shell on silver nanoparticle-assembled silica nanocomposites, SiO<sub>2</sub>@Ag NPs, by controlling the number of reacting SiO<sub>2</sub>@Ag NPs and the silica precursor. Uniform silica shells with thicknesses in the range 5–40 nm were successfully fabricated. The proposed method for creating a homogeneous, precise, and fine silica coating on nanocomposites can potentially contribute to a comprehensive understanding of the distance-dependent electromagnetic field effects and optical properties of metal NPs.Eunil HahmAhla JoEun Ji KangSungje BockXuan-Hung PhamHyejin ChangBong-Hyun JunMDPI AGarticlesilica shellfine controlshell thicknessassembled structuresBiology (General)QH301-705.5ChemistryQD1-999ENInternational Journal of Molecular Sciences, Vol 22, Iss 11983, p 11983 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	silica shell fine control shell thickness assembled structures Biology (General) QH301-705.5 Chemistry QD1-999
spellingShingle	silica shell fine control shell thickness assembled structures Biology (General) QH301-705.5 Chemistry QD1-999 Eunil Hahm Ahla Jo Eun Ji Kang Sungje Bock Xuan-Hung Pham Hyejin Chang Bong-Hyun Jun Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
description	To study the distance-dependent electromagnetic field effects related to the enhancement and quenching mechanism of surface-enhanced Raman scattering (SERS) or fluorescence, it is essential to precisely control the distance from the surface of the metal nanoparticle (NP) to the target molecule by using a dielectric layer (e.g., SiO<sub>2</sub>, TiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub>). However, precisely controlling the thickness of this dielectric layer is challenging. Herein, we present a facile approach to control the thickness of the silica shell on silver nanoparticle-assembled silica nanocomposites, SiO<sub>2</sub>@Ag NPs, by controlling the number of reacting SiO<sub>2</sub>@Ag NPs and the silica precursor. Uniform silica shells with thicknesses in the range 5–40 nm were successfully fabricated. The proposed method for creating a homogeneous, precise, and fine silica coating on nanocomposites can potentially contribute to a comprehensive understanding of the distance-dependent electromagnetic field effects and optical properties of metal NPs.
format	article
author	Eunil Hahm Ahla Jo Eun Ji Kang Sungje Bock Xuan-Hung Pham Hyejin Chang Bong-Hyun Jun
author_facet	Eunil Hahm Ahla Jo Eun Ji Kang Sungje Bock Xuan-Hung Pham Hyejin Chang Bong-Hyun Jun
author_sort	Eunil Hahm
title	Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
title_short	Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
title_full	Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
title_fullStr	Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
title_full_unstemmed	Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures
title_sort	ultra-fine control of silica shell thickness on silver nanoparticle-assembled structures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7a13780e2bac48a488474d57cfdd6a83
work_keys_str_mv	AT eunilhahm ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT ahlajo ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT eunjikang ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT sungjebock ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT xuanhungpham ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT hyejinchang ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures AT bonghyunjun ultrafinecontrolofsilicashellthicknessonsilvernanoparticleassembledstructures
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Ultra-Fine Control of Silica Shell Thickness on Silver Nanoparticle-Assembled Structures

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