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Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles

Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanop...

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Autores principales: Vorobyev, Sergey, Vishnyakova, Elena, Likhatski, Maxim, Romanchenko, Alexander, Nemtsev, Ivan, Mikhlin, Yuri
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915523/
https://www.ncbi.nlm.nih.gov/pubmed/31717758
http://dx.doi.org/10.3390/nano9111525
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author Vorobyev, Sergey
Vishnyakova, Elena
Likhatski, Maxim
Romanchenko, Alexander
Nemtsev, Ivan
Mikhlin, Yuri
author_facet Vorobyev, Sergey
Vishnyakova, Elena
Likhatski, Maxim
Romanchenko, Alexander
Nemtsev, Ivan
Mikhlin, Yuri
author_sort Vorobyev, Sergey
collection PubMed
description Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H(2)PtCl(6) complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl(4) solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.
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spelling pubmed-69155232019-12-24 Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles Vorobyev, Sergey Vishnyakova, Elena Likhatski, Maxim Romanchenko, Alexander Nemtsev, Ivan Mikhlin, Yuri Nanomaterials (Basel) Article Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H(2)PtCl(6) complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl(4) solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications. MDPI 2019-10-26 /pmc/articles/PMC6915523/ /pubmed/31717758 http://dx.doi.org/10.3390/nano9111525 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vorobyev, Sergey
Vishnyakova, Elena
Likhatski, Maxim
Romanchenko, Alexander
Nemtsev, Ivan
Mikhlin, Yuri
Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title_full Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title_fullStr Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title_full_unstemmed Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title_short Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles
title_sort reactivity and chemical sintering of carey lea silver nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915523/
https://www.ncbi.nlm.nih.gov/pubmed/31717758
http://dx.doi.org/10.3390/nano9111525
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