Related Experiment Video
Updated: Nov 21, 2025
08:18
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
Published on: March 4, 2021
2.0K
Three-dimensional atomic structure of supported Au nanoparticles at high temperature
Pei Liu1, Ece Arslan Irmak, Annick De Backer
1Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium. sara.bals@uantwerpen.be.
Nanoscale
|January 12, 2021
Summary
This study reveals the 3D atomic structure of gold nanoparticles (Au NPs) on ceria catalysts at various temperatures. Researchers characterized their dynamic structural evolution, crucial for understanding high-temperature catalytic activity.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Gold nanoparticles (Au NPs) on ceria (CeO2) are vital thermal catalysts.
- NP morphology stability at high temperatures is crucial for catalytic activity.
- The 3D atomic structure of Au NPs at varying temperatures remains poorly understood.
Purpose of the Study:
- To characterize the 3D equilibrium and dynamic structure of supported Au NPs at the atomic scale as a function of temperature.
- To overcome limitations of conventional electron tomography for nanoscale materials.
- To provide insights into the temperature-dependent behavior of Au NPs in catalysis.
Main Methods:
- Utilized aberration-corrected scanning transmission electron microscopy (STEM) with atom counting.
- Combined experimental imaging with molecular dynamics (MD) relaxation.
- Performed atomic-resolution 3D investigation of single, supported Au NPs.
Main Results:
- Successfully characterized the 3D equilibrium structure of individual Au NPs across a range of temperatures.
- Observed and analyzed dynamic 3D structural evolution at elevated temperatures.
- Documented phenomena such as surface layer jumping and crystalline transformations in Au NPs.
Conclusions:
- Developed a novel method for atomic-resolution 3D structural characterization of supported NPs.
- Provided a detailed understanding of the temperature-dependent structural dynamics of Au NPs.
- Established a foundation for designing more stable and active high-temperature catalysts.
