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Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

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Related Experiment Video

Updated: May 21, 2026

Revealing Dynamic Processes of Materials in Liquids Using Liquid Cell Transmission Electron Microscopy

Revealing Dynamic Processes of Materials in Liquids Using Liquid Cell Transmission Electron Microscopy

Published on: December 20, 2012

Visualizing Metal Nanoparticle Electrochemical Dissolution Atom by Atom.

Pei Zhao¹, Daniel Houghton¹, Richard Beanland²

¹Department of Chemistry, University of Warwick, Coventry, UK.

Small (Weinheim an Der Bergstrasse, Germany)

|May 20, 2026

Summary

This summary is machine-generated.

Tracking atom loss from individual gold nanoparticles during electrochemical dissolution is now possible. This study reveals how nanoparticles flatten and interact at the atomic level during this process.

Keywords:

atoms boron doped diamond dissolution electrochemistry gold nanoparticles transmission electron microscopy

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Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

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Published on: July 5, 2016

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Last Updated: May 21, 2026

Revealing Dynamic Processes of Materials in Liquids Using Liquid Cell Transmission Electron Microscopy

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Published on: December 20, 2012

Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)

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Published on: February 10, 2021

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Published on: July 5, 2016

Area of Science:

Electrochemistry
Materials Science
Nanotechnology

Background:

Electrochemical dissolution of metal nanoparticles (NPs) is critical for understanding various processes.
Quantifying atom loss from individual NPs during dissolution is experimentally challenging.
Previous methods lacked the temporal and spatial resolution to track atomic changes in situ.

Purpose of the Study:

To investigate the early stages of electrochemical dissolution of gold nanoparticles (Au NPs).
To quantify atom loss and gain at the individual NP level.
To visualize morphological changes and inter-NP interactions during dissolution.

Main Methods:

Utilized identical-location, annular dark field, scanning transmission electron microscopy (IL-ADF-STEM) for high-resolution imaging.
Performed electrochemical dissolution of gold NPs in aqueous chloride solutions at millisecond timescales.
Employed image intensity analysis to count atoms per NP and 3D reconstruction for morphological analysis.

Main Results:

Tracked atom loss and gain for individual gold NPs over time.
Observed NPs flattening during dissolution, rather than uniform diameter reduction.
Identified increased isolated gold atoms on NP surfaces and significant inter-NP interactions, including bridge formation and coalescence.
Smallest NPs (≤4 nm) exhibited the largest atom loss.

Conclusions:

IL-ADF-STEM enables precise tracking of atomic processes during NP dissolution.
Gold NP dissolution involves complex morphological changes and atomic rearrangements.
Interactions between NPs play a significant role during electrochemical dissolution.