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Updated: Jun 16, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

Surface Self-Diffusion Induced Sintering of Nanoparticles.

Xiaobo Chen¹, Can Li², Boyang Li³

¹Materials Science and Engineering Program and Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States.

|November 1, 2024

Summary

This study reveals how surface self-diffusion drives nanoparticle sintering, enabling coalescence without particle movement. These findings offer new ways to control nanoparticle stability and size.

Keywords:

In-situ TEM Neck initiation Pt−Fe nanoparticles Sintering Surface self-diffusion

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Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis

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Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Nanoparticle sintering limits the long-term durability of nanomaterials.
Understanding nanoparticle sintering mechanisms, especially neck initiation, is challenging.

Purpose of the Study:

To elucidate the atomic dynamics of neck initiation in nanoparticle sintering.
To identify the primary mechanisms driving nanoparticle coalescence.

Main Methods:

In situ transmission electron microscopy (TEM) for real-time imaging.
Atomistic modeling to analyze atomic dynamics.
Observing thermally activated surface morphology changes.

Main Results:

Identified surface self-diffusion as the key mechanism for neck initiation in Pt-Fe nanoparticles.
Demonstrated atomic layer nucleation and growth in nanoparticle gaps.
Showcased sintering at lower temperatures compared to traditional methods.

Conclusions:

Surface self-diffusion drives nanoparticle sintering and coalescence without significant particle migration.
This mechanism offers a lower activation temperature pathway for sintering.
Provides insights for controlling nanostructure morphology, size, and stability.