Deciphering the Elementary Steps of Transport-Reaction Processes at Individual Ag Nanoparticles by 3D Superlocalization Microscopy

Transport-reaction processes at individual Ag nanoparticles (NPs) are studied using electrochemistry coupled with in situ 3D light scattering microscopy. Electrochemistry is used to trigger a (i) diffusiophoretic transport mode capable of accelerating and preconcentrating NPs toward an electrode and...

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Published inNano letters Vol. 15; no. 10; pp. 6454 - 6463
Main Authors Patel, Anisha N, Martinez-Marrades, Ariadna, Brasiliense, Vitor, Koshelev, Dmitry, Besbes, Mondher, Kuszelewicz, Robert, Combellas, Catherine, Tessier, Gilles, Kanoufi, Frédéric
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 14.10.2015
Subjects
Diffusion
Electrochemistry
Electrodes
Joining
Microscopy
Nanoparticles
Silver
Three dimensional
Single nanoparticles
3D superlocalization optical microscopy
diffusiophoresis
electrodissolution
opto-electrochemistry
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Summary:Transport-reaction processes at individual Ag nanoparticles (NPs) are studied using electrochemistry coupled with in situ 3D light scattering microscopy. Electrochemistry is used to trigger a (i) diffusiophoretic transport mode capable of accelerating and preconcentrating NPs toward an electrode and (ii) subsequent diffusion-controlled oxidation of NPs. Individual NP dissolution rate, analyzed using optical modeling, suggests the intervention of insoluble products. New insights into diverse NPs behaviors highlight the strength of coupled optical-electrochemical 3D microscopies for single-NP studies.
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ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.5b02921