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Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping

The influence of nanoparticle aggregation on anodic stripping voltammetry is reported. Dopamine-capped silver nanoparticles were chosen as a model system, and melamine was used to induce aggregation in the nanoparticles. Through the anodic stripping of the silver nanoparticles that were aggregated t...

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Autores principales: Cloake, Samantha J, Toh, Her Shuang, Lee, Patricia T, Salter, Chris, Johnston, Colin, Compton, Richard G
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BlackWell Publishing Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4380949/
https://www.ncbi.nlm.nih.gov/pubmed/25861566
http://dx.doi.org/10.1002/open.201402050
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author Cloake, Samantha J
Toh, Her Shuang
Lee, Patricia T
Salter, Chris
Johnston, Colin
Compton, Richard G
author_facet Cloake, Samantha J
Toh, Her Shuang
Lee, Patricia T
Salter, Chris
Johnston, Colin
Compton, Richard G
author_sort Cloake, Samantha J
collection PubMed
description The influence of nanoparticle aggregation on anodic stripping voltammetry is reported. Dopamine-capped silver nanoparticles were chosen as a model system, and melamine was used to induce aggregation in the nanoparticles. Through the anodic stripping of the silver nanoparticles that were aggregated to different extents, it was found that the peak area of the oxidative signal corresponding to the stripping of silver to silver(I) ions decreases with increasing aggregation. Aggregation causes incomplete stripping of the silver nanoparticles. Two possible mechanisms of ‘partial oxidation’ and ‘inactivation’ of the nanoparticles are proposed to account for this finding. Aggregation effects must be considered when anodic stripping voltammetry is used for nanoparticle detection and quantification. Hence, drop casting, which is known to lead to aggregation, is not encouraged for preparing electrodes for analytical purposes.
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spelling pubmed-43809492015-04-08 Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping Cloake, Samantha J Toh, Her Shuang Lee, Patricia T Salter, Chris Johnston, Colin Compton, Richard G ChemistryOpen Communications The influence of nanoparticle aggregation on anodic stripping voltammetry is reported. Dopamine-capped silver nanoparticles were chosen as a model system, and melamine was used to induce aggregation in the nanoparticles. Through the anodic stripping of the silver nanoparticles that were aggregated to different extents, it was found that the peak area of the oxidative signal corresponding to the stripping of silver to silver(I) ions decreases with increasing aggregation. Aggregation causes incomplete stripping of the silver nanoparticles. Two possible mechanisms of ‘partial oxidation’ and ‘inactivation’ of the nanoparticles are proposed to account for this finding. Aggregation effects must be considered when anodic stripping voltammetry is used for nanoparticle detection and quantification. Hence, drop casting, which is known to lead to aggregation, is not encouraged for preparing electrodes for analytical purposes. BlackWell Publishing Ltd 2015-02 2014-10-13 /pmc/articles/PMC4380949/ /pubmed/25861566 http://dx.doi.org/10.1002/open.201402050 Text en © 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
spellingShingle Communications
Cloake, Samantha J
Toh, Her Shuang
Lee, Patricia T
Salter, Chris
Johnston, Colin
Compton, Richard G
Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title_full Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title_fullStr Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title_full_unstemmed Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title_short Anodic Stripping Voltammetry of Silver Nanoparticles: Aggregation Leads to Incomplete Stripping
title_sort anodic stripping voltammetry of silver nanoparticles: aggregation leads to incomplete stripping
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4380949/
https://www.ncbi.nlm.nih.gov/pubmed/25861566
http://dx.doi.org/10.1002/open.201402050
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