Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia

Producción Científica

Bibliographic Details
Authors: Abu Serea, Esraa Samy, Berganza, Leixuri B., Lanceros Méndez, Senentxu, Reguera Gómez, Javier
Format: article
Status:Published version
Publication Date:2024
Country:España
Institution:Universidad de Valladolid
Repository:UVaDOC. Repositorio Documental de la Universidad de Valladolid
OAI Identifier:oai:uvadoc.uva.es:10324/70917
Online Access:https://doi.org/10.1021/acsanm.4c03310
https://uvadoc.uva.es/handle/10324/70917
Access Level:Open access
Keyword:Gold nanostars
Anisotropic nanoparticles
Tip sharpening
Hyperthermia
Catalysis
SERS
22 Física
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oai_identifier_str oai:uvadoc.uva.es:10324/70917
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spelling Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermiaAbu Serea, Esraa SamyBerganza, Leixuri B.Lanceros Méndez, SenentxuReguera Gómez, JavierGold nanostarsAnisotropic nanoparticlesTip sharpeningHyperthermiaCatalysisSERS22 FísicaProducción CientíficaGold nanostars have shown enormous potential as the main enablers of advanced applications ranging from biomedicine to sensing or catalysis. Their unique anisotropic structure featuring sharp spikes that grow from a central core offers enhanced optical capabilities and spectral tunability. Although several synthesis methods yield NSs of different morphologies and sizes up to several hundred nanometers, obtaining small NSs, while maintaining their plasmonic properties in the near-infrared, has proven challenging and elusive. Here, we show that Cu2+ addition during NS synthesis in polyvinylpyrrolidone/dimethylformamide generates more crystallographic defects and promotes the directional growth, giving rise to NSs with a larger number of much sharper spikes. They are also formed at smaller volumes, enabling the generation of ultrasmall nanostars, with a volume as small as 421 nm3 (i.e., 9.2 nm of volume-equivalent diameter), while maintaining a plasmon resonance in the near-infrared. To this end, we systematically evaluate the influence of synthesis parameters on the nanostar size and optical characteristics and demonstrate their properties for applications in catalysis, surface-enhanced Raman spectroscopy sensing, and hyperthermia. The ultrasmall nanostars show excellent attributes in all of them, leveraging their small size to enhance properties related to a higher surface-to-volume ratio or colloidal diffusivity.Ministerio de Ciencia e Innovación (PID2022-139467OB-I00)Ministerio de Ciencia, Innovación y Universidades (CNS2023-144447)ACS (American Chemical Society)2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.1021/acsanm.4c03310https://uvadoc.uva.es/handle/10324/70917reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolidinstname:Universidad de ValladolidIngléshttps://pubs.acs.org/doi/10.1021/acsanm.4c03310info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/oai:uvadoc.uva.es:10324/709172026-06-13T12:44:47Z
dc.title.none.fl_str_mv Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
title Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
spellingShingle Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
Abu Serea, Esraa Samy
Gold nanostars
Anisotropic nanoparticles
Tip sharpening
Hyperthermia
Catalysis
SERS
22 Física
title_short Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
title_full Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
title_fullStr Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
title_full_unstemmed Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
title_sort Cu2+–assisted synthesis of ultrasharp and sub-10 nm gold nanostars. Applications in catalysis, sensing, and photothermia
dc.creator.none.fl_str_mv Abu Serea, Esraa Samy
Berganza, Leixuri B.
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author Abu Serea, Esraa Samy
author_facet Abu Serea, Esraa Samy
Berganza, Leixuri B.
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author_role author
author2 Berganza, Leixuri B.
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author2_role author
author
author
dc.subject.none.fl_str_mv Gold nanostars
Anisotropic nanoparticles
Tip sharpening
Hyperthermia
Catalysis
SERS
22 Física
topic Gold nanostars
Anisotropic nanoparticles
Tip sharpening
Hyperthermia
Catalysis
SERS
22 Física
description Producción Científica
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1021/acsanm.4c03310
https://uvadoc.uva.es/handle/10324/70917
url https://doi.org/10.1021/acsanm.4c03310
https://uvadoc.uva.es/handle/10324/70917
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://pubs.acs.org/doi/10.1021/acsanm.4c03310
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ACS (American Chemical Society)
publisher.none.fl_str_mv ACS (American Chemical Society)
dc.source.none.fl_str_mv reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolid
instname:Universidad de Valladolid
instname_str Universidad de Valladolid
reponame_str UVaDOC. Repositorio Documental de la Universidad de Valladolid
collection UVaDOC. Repositorio Documental de la Universidad de Valladolid
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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