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Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures

Quinson, Jonathan ; Aalling-Frederiksen, Olivia ; Dacayan, Waynah L. ; Bjerregaard, Joachim D. ; Jensen, Kim D. ; Jørgensen, Mads R.V. LU orcid ; Kantor, Innokenty LU ; Sørensen, Daniel R. LU orcid ; Theil Kuhn, Luise and Johnson, Matthew S. , et al. (2023) In Chemistry of Materials 35(5). p.2173-2190
Abstract

Gold nanoparticles (Au NPs) and gold-based nanomaterials combine unique properties relevant for medicine, imaging, optics, sensing, catalysis, and energy conversion. While the Turkevich-Frens and Brust-Schiffrin methods remain the state-of-the-art colloidal syntheses of Au NPs, there is a need for more sustainable and tractable synthetic strategies leading to new model systems. In particular, stabilizers are almost systematically used in colloidal syntheses, but they can be detrimental for fundamental and applied studies. Here, a surfactant-free synthesis of size-controlled colloidal Au NPs stable for months is achieved by the simple reduction of HAuCl4 at room temperature in alkaline solutions of low-viscosity mono-alcohols... (More)

Gold nanoparticles (Au NPs) and gold-based nanomaterials combine unique properties relevant for medicine, imaging, optics, sensing, catalysis, and energy conversion. While the Turkevich-Frens and Brust-Schiffrin methods remain the state-of-the-art colloidal syntheses of Au NPs, there is a need for more sustainable and tractable synthetic strategies leading to new model systems. In particular, stabilizers are almost systematically used in colloidal syntheses, but they can be detrimental for fundamental and applied studies. Here, a surfactant-free synthesis of size-controlled colloidal Au NPs stable for months is achieved by the simple reduction of HAuCl4 at room temperature in alkaline solutions of low-viscosity mono-alcohols such as ethanol or methanol and water, without the need for any other additives. Palladium (Pd) and bimetallic AuxPdy NPs, nanocomposites and multimetallic samples, are also obtained and are readily active (electro)catalysts. The multiple benefits over the state-of-the-art syntheses that this simple synthesis bears for fundamental and applied research are highlighted.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemistry of Materials
volume
35
issue
5
pages
2173 - 2190
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:36936178
  • scopus:85149039979
ISSN
0897-4756
DOI
10.1021/acs.chemmater.3c00090
language
English
LU publication?
yes
id
e3237f18-9b15-4875-a904-7d54413bdd93
date added to LUP
2023-03-16 14:30:29
date last changed
2024-06-14 12:59:33
@article{e3237f18-9b15-4875-a904-7d54413bdd93,
  abstract     = {{<p>Gold nanoparticles (Au NPs) and gold-based nanomaterials combine unique properties relevant for medicine, imaging, optics, sensing, catalysis, and energy conversion. While the Turkevich-Frens and Brust-Schiffrin methods remain the state-of-the-art colloidal syntheses of Au NPs, there is a need for more sustainable and tractable synthetic strategies leading to new model systems. In particular, stabilizers are almost systematically used in colloidal syntheses, but they can be detrimental for fundamental and applied studies. Here, a surfactant-free synthesis of size-controlled colloidal Au NPs stable for months is achieved by the simple reduction of HAuCl<sub>4</sub> at room temperature in alkaline solutions of low-viscosity mono-alcohols such as ethanol or methanol and water, without the need for any other additives. Palladium (Pd) and bimetallic Au<sub>x</sub>Pd<sub>y</sub> NPs, nanocomposites and multimetallic samples, are also obtained and are readily active (electro)catalysts. The multiple benefits over the state-of-the-art syntheses that this simple synthesis bears for fundamental and applied research are highlighted.</p>}},
  author       = {{Quinson, Jonathan and Aalling-Frederiksen, Olivia and Dacayan, Waynah L. and Bjerregaard, Joachim D. and Jensen, Kim D. and Jørgensen, Mads R.V. and Kantor, Innokenty and Sørensen, Daniel R. and Theil Kuhn, Luise and Johnson, Matthew S. and Escudero-Escribano, María and Simonsen, Søren B. and Jensen, Kirsten M.Ø.}},
  issn         = {{0897-4756}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{2173--2190}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Chemistry of Materials}},
  title        = {{Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures}},
  url          = {{http://dx.doi.org/10.1021/acs.chemmater.3c00090}},
  doi          = {{10.1021/acs.chemmater.3c00090}},
  volume       = {{35}},
  year         = {{2023}},
}