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Related Experiment Video

Updated: Apr 25, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

Atomic-scale evolution of a growing core-shell nanoparticle.

Shai Mangel¹, Eran Aronovitch, Andrey N Enyashin

¹Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel.

Journal of the American Chemical Society

|August 27, 2014

Summary

This summary is machine-generated.

This study uses advanced transmission electron microscopy (TEM) to visualize atomic-scale growth on nanoparticle surfaces in solution. Researchers observed direct growth and shell formation, revealing insights into nanoparticle structural evolution.

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Area of Science:

Materials Chemistry
Nanotechnology
Surface Science

Background:

Understanding atomic-scale growth at solid/solution interfaces is crucial for molecular and materials chemistry.
Studying chemistry on nanoparticle surfaces in solution presents significant challenges.
Direct visualization of growth processes at the nanoscale is limited.

Purpose of the Study:

To provide atomic-scale resolution of growth processes on inorganic nanoparticle surfaces.
To directly observe and analyze the formation of nanoparticle shells.
To correlate synthetic methods with observed atomic structures and defects.

Main Methods:

Utilized state-of-the-art aberration-corrected transmission electron microscopy (TEM).
Employed focal series reconstruction for atomic-scale resolution.
Studied cadmium selenide (CdSe) nanoparticles and their transformation into cadmium sulfide (CdS) shells.

Main Results:

Achieved direct, atomic-scale observation of growth on CdSe nanoparticle surfaces.
Revealed the formation process of CdS shells on CdSe cores.
Identified and mapped lattice disorder, such as stacking faults, within CdSe cores and observed their elimination during annealing.

Conclusions:

The developed strategy enables direct, atomic-scale monitoring of nanoparticle growth and structural evolution in solution.
Insights into defect dynamics and their reduction during annealing were gained.
This approach offers a powerful tool for understanding and controlling the synthesis of inorganic nanostructures.