Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions

Monodisperse dendrimer-coated gold nanoparticles with a spherical shape have been obtained by direct reduction of HAuCl4 with sodium borohydride in the presence of dodecanethiol as a stabilizer and subsequent functionalization by ligand exchange reaction with polybenzylic thiolated dendrons. The sub...

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Authors: Ulloa, José Antonio, Barberá, Joaquín, Serrano, José Luis
Format: article
Status:Published version
Publication Date:2021
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/265578
Online Access:http://hdl.handle.net/10261/265578
https://doi.org/10.1021/acsomega.0c04662
Access Level:Open access
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spelling Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditionsUlloa, José AntonioBarberá, JoaquínSerrano, José LuisMonodisperse dendrimer-coated gold nanoparticles with a spherical shape have been obtained by direct reduction of HAuCl4 with sodium borohydride in the presence of dodecanethiol as a stabilizer and subsequent functionalization by ligand exchange reaction with polybenzylic thiolated dendrons. The substitution pattern of the dendrimeric units plays a fundamental role in the rate of the functionalization exchange process and consequently conditions the size and the polydispersity of the NPs obtained. An ulterior growth process occurs by thermal stimuli (150 °C) in a solvent-free environment. This method, carried out in mild conditions, allows the formation of highly monodisperse gold NPs with different sizes for different time reactions, and we discuss the mechanisms involved in this process. Finally, we demonstrate the chemical composition and stability of our compounds by structural, thermal, and chemical characterization of the samples before and after thermal treatment.This work was supported by the MINECO-FEDER funds (project PGC2018-097583-B-I00) and Gobierno de Aragón-FSE (Research Group E47_20R). The authors acknowledge the use of SAI (UZ), CEQMA (UZ-CSIC), and LMA (UZ-CSIC) services. J. A. Ulloa thanks the Becas-Chile program of the National Commission for Scientific and Technological Research (CONICYT, Chile) for his PhD grant.Peer reviewedAmerican Chemical SocietyMinisterio de Ciencia, Innovación y Universidades (España)Comisión Nacional de Investigación Científica y Tecnológica (Chile)European CommissionAgencia Estatal de Investigación (España)Ministerio de Economía y Competitividad (España)Gobierno de AragónConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/265578https://doi.org/10.1021/acsomega.0c04662reponame: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 2017-2020/PGC2018-097583-B-I00https://doi.org/10.1021/acsomega.0c04662Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2655782026-05-22T06:33:51Z
dc.title.none.fl_str_mv Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
title Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
spellingShingle Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
Ulloa, José Antonio
title_short Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
title_full Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
title_fullStr Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
title_full_unstemmed Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
title_sort Controlled growth of dendrimer-coated gold nanoparticles: A solvent-free process in mild conditions
dc.creator.none.fl_str_mv Ulloa, José Antonio
Barberá, Joaquín
Serrano, José Luis
author Ulloa, José Antonio
author_facet Ulloa, José Antonio
Barberá, Joaquín
Serrano, José Luis
author_role author
author2 Barberá, Joaquín
Serrano, José Luis
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Comisión Nacional de Investigación Científica y Tecnológica (Chile)
European Commission
Agencia Estatal de Investigación (España)
Ministerio de Economía y Competitividad (España)
Gobierno de Aragón
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Monodisperse dendrimer-coated gold nanoparticles with a spherical shape have been obtained by direct reduction of HAuCl4 with sodium borohydride in the presence of dodecanethiol as a stabilizer and subsequent functionalization by ligand exchange reaction with polybenzylic thiolated dendrons. The substitution pattern of the dendrimeric units plays a fundamental role in the rate of the functionalization exchange process and consequently conditions the size and the polydispersity of the NPs obtained. An ulterior growth process occurs by thermal stimuli (150 °C) in a solvent-free environment. This method, carried out in mild conditions, allows the formation of highly monodisperse gold NPs with different sizes for different time reactions, and we discuss the mechanisms involved in this process. Finally, we demonstrate the chemical composition and stability of our compounds by structural, thermal, and chemical characterization of the samples before and after thermal treatment.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
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/10261/265578
https://doi.org/10.1021/acsomega.0c04662
url http://hdl.handle.net/10261/265578
https://doi.org/10.1021/acsomega.0c04662
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 2017-2020/PGC2018-097583-B-I00
https://doi.org/10.1021/acsomega.0c04662
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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