Cu2+–Assisted Synthesis of Ultrasharp and Sub-10 nm Gold Nanostars. Applications in Catalysis, Sensing, and Photothermia

Gold 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...

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Autores: Sewlam, Esraa Samy Abu Serea, Baños Berganza, Leixuri, Lanceros Méndez, Senentxu, Reguera Gómez, Javier
Formato: artículo
Fecha de publicación:2024
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/69359
Acesso em linha:http://hdl.handle.net/10810/69359
Access Level:acceso abierto
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spelling Cu2+–Assisted Synthesis of Ultrasharp and Sub-10 nm Gold Nanostars. Applications in Catalysis, Sensing, and PhotothermiaSewlam, Esraa Samy Abu SereaBaños Berganza, LeixuriLanceros Méndez, SenentxuReguera Gómez, JavierGold 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.The authors thank the Spanish State Research Agency (AEI) for funding through the project PID2022-139467OB-I00/AEI/10.13039/501100011033, and CNS2023-144447/MICIU/AEI/10.13039/501100011033/NextGenerationEU/PRTR. The authors also thank the technical support of SGIker.ACS202420242024info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/69359reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MICINN/PID2022-139467OB-I00/info:eu-repo/grantAgreement/MICIU/CNS2023-144447/https://pubs.acs.org/doi/full/10.1021/acsanm.4c03310info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/es/© 2024 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0.Atribución 3.0 Españaoai:addi.ehu.eus:10810/693592026-06-18T09:23:17Z
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
Sewlam, Esraa Samy Abu Serea
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 Sewlam, Esraa Samy Abu Serea
Baños Berganza, Leixuri
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author Sewlam, Esraa Samy Abu Serea
author_facet Sewlam, Esraa Samy Abu Serea
Baños Berganza, Leixuri
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author_role author
author2 Baños Berganza, Leixuri
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author2_role author
author
author
description Gold 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.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/69359
url http://hdl.handle.net/10810/69359
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MICINN/PID2022-139467OB-I00/
info:eu-repo/grantAgreement/MICIU/CNS2023-144447/
https://pubs.acs.org/doi/full/10.1021/acsanm.4c03310
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ACS
publisher.none.fl_str_mv ACS
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
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