Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties

13 pages, 7 figures

Detalles Bibliográficos
Autores: Peñas-Farré, Judith, Xiao, Xiaofei, Giannini, V., Mateos, Xavier, Guerrini, Luca, Pazos-Perez, Nicolas
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/413161
Acceso en línea:http://hdl.handle.net/10261/413161
https://api.elsevier.com/content/abstract/scopus_id/105025124632
Access Level:acceso abierto
Palabra clave:Ag overgrowth
Bimetallic
Core−shell
Nanostars
Plasmonic
Surface-enhanced Raman scattering
http://metadata.un.org/sdg/3
Ensure healthy lives and promote well-being for all at all ages
nanoparticles
Chemistry
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spelling Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic PropertiesPeñas-Farré, JudithXiao, XiaofeiGiannini, V.Mateos, XavierGuerrini, LucaPazos-Perez, NicolasAg overgrowthBimetallicCore−shellNanostarsPlasmonicSurface-enhanced Raman scatteringhttp://metadata.un.org/sdg/3Ensure healthy lives and promote well-being for all at all agesnanoparticlesChemistry13 pages, 7 figuresSilver-coated gold nanostars (AuNSt@Ag) offer a powerful platform for plasmon-enhanced sensing, yet their fabrication often compromises structural sharpness and spectral tunability. Here, we report a robust and flexible method for synthesizing AuNSt@Ag with precisely controlled localized surface plasmon resonance (LSPR) across a broad spectral range, achieved by systematically optimizing multiple synthetic parameters. Strikingly, surface-enhanced Raman scattering (SERS) performance reached a maximum for bimetallic nanostars with LSPR maxima near 605-615 nm, regardless of excitation wavelength (633 or 785 nm). This reveals that local near-field enhancement at Ag-coated tips, rather than spectral overlap, governs SERS efficiency in these AuNSt@Ag systems. The optimized AuNSt@Ag structures outperform previously reported analogues, exhibiting significantly enhanced SERS capabilities, including an 80-fold increase in signal compared to optimized monometallic AuNSt resonant with the 785 nm laser line. These findings establish a new design paradigm for highly tunable and high-performance plasmonic substrates for analytical sensing applications.Grant PID2022-141499OB-100, funded by MICIU/AEI/ 10.13039/501100011033/and by FEDER/UE.Peer reviewedAmerican Chemical SocietyMinisterio de Ciencia, Innovación y Universidades (España)#NODATA##NODATA#Giannini, V. [0000-0001-8025-4964]Mateos, Xavier [0000-0003-1940-1990]Guerrini, Luca [0000-0002-2925-1562]Pazos-Perez, Nicolas [0000-0002-2326-4231]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/413161https://api.elsevier.com/content/abstract/scopus_id/105025124632reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-141499OB-I00https://doi.org/10.1021/acsnanoscienceau.5c00075Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4131612026-05-22T06:33:51Z
dc.title.none.fl_str_mv Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
title Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
spellingShingle Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
Peñas-Farré, Judith
Ag overgrowth
Bimetallic
Core−shell
Nanostars
Plasmonic
Surface-enhanced Raman scattering
http://metadata.un.org/sdg/3
Ensure healthy lives and promote well-being for all at all ages
nanoparticles
Chemistry
title_short Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
title_full Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
title_fullStr Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
title_full_unstemmed Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
title_sort Synthesis and Optimization of Highly Bright Silver-Coated Au Nanostars with Tunable Plasmonic Properties
dc.creator.none.fl_str_mv Peñas-Farré, Judith
Xiao, Xiaofei
Giannini, V.
Mateos, Xavier
Guerrini, Luca
Pazos-Perez, Nicolas
author Peñas-Farré, Judith
author_facet Peñas-Farré, Judith
Xiao, Xiaofei
Giannini, V.
Mateos, Xavier
Guerrini, Luca
Pazos-Perez, Nicolas
author_role author
author2 Xiao, Xiaofei
Giannini, V.
Mateos, Xavier
Guerrini, Luca
Pazos-Perez, Nicolas
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
#NODATA#
#NODATA#
Giannini, V. [0000-0001-8025-4964]
Mateos, Xavier [0000-0003-1940-1990]
Guerrini, Luca [0000-0002-2925-1562]
Pazos-Perez, Nicolas [0000-0002-2326-4231]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Ag overgrowth
Bimetallic
Core−shell
Nanostars
Plasmonic
Surface-enhanced Raman scattering
http://metadata.un.org/sdg/3
Ensure healthy lives and promote well-being for all at all ages
nanoparticles
Chemistry
topic Ag overgrowth
Bimetallic
Core−shell
Nanostars
Plasmonic
Surface-enhanced Raman scattering
http://metadata.un.org/sdg/3
Ensure healthy lives and promote well-being for all at all ages
nanoparticles
Chemistry
description 13 pages, 7 figures
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/413161
https://api.elsevier.com/content/abstract/scopus_id/105025124632
url http://hdl.handle.net/10261/413161
https://api.elsevier.com/content/abstract/scopus_id/105025124632
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-141499OB-I00
https://doi.org/10.1021/acsnanoscienceau.5c00075
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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