Shaping Copper Oxide Layers on Gold Nanoparticle Ensembles by Controlled Electrodeposition with Single Particle Scatterometry

Electrodeposition of copper on gold nanoelectrode ensembles result in the formation of uniform copper oxide layers on individual nanoparticles. A linear sweep of voltammetric change induces three distinct morphologies dependent upon particle density. Ex situ imaging and in situ scatterometry at a si...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2023-08, Vol.19 (32), p.e2301241-n/a
Main Authors: Hwang, Hyunsik, Oh, Hyuncheol, Song, Hyunjoon
Format: Article
Language:English
Subjects:
Copper oxides
dark‐field microscopy
electrochemical Ostwald ripening
Electrodeposition
Gold
Morphology
nanoelectrode ensemble
Nanoparticles
Nanotechnology
Nucleation
Particle density (concentration)
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Summary:Electrodeposition of copper on gold nanoelectrode ensembles result in the formation of uniform copper oxide layers on individual nanoparticles. A linear sweep of voltammetric change induces three distinct morphologies dependent upon particle density. Ex situ imaging and in situ scatterometry at a single‐particle level identifies multi‐step electrochemical growth sequences that deviated from classical nucleation and growth pathways. In addition, the study demonstrated the possibility of synthesizing sophisticated structures based on the symmetry of nanoelectrodes. This result guides the nanoscale morphology control of electrode ensembles with potential application in electrocatalysis and sensing. Copper oxide layers are grown uniformly on gold nanoelectrode ensembles by electrodeposition, where the final morphologies are varied by particle density and symmetry. The non‐classical multi‐step growth processes are resolved using in situ scatterometry and ex situ imaging at a single particle level.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202301241