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Simultaneous Successive Twinning Captured by Atomic Electron Tomography.

Philipp M Pelz1,2, Catherine Groschner1, Alexandra Bruefach1

  • 1Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California 94720, United States.

ACS Nano
|November 16, 2021
PubMed
Summary
This summary is machine-generated.

Researchers used atomic electron tomography to study shape transitions in palladium nanoparticles. They revealed the 3D atomic structure of a nanoparticle changing from decahedral to icosahedral during synthesis.

Keywords:
catalysiselectron microscopyelectron tomographymetal nanoparticlesmultiply twinned nanoparticlessuccessive twinning

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Area of Science:

  • Nanoscience
  • Materials Science
  • Catalysis

Background:

  • Controlling nanoparticle size, shape, and facets is crucial for catalysis.
  • Understanding nanoparticle synthesis requires studying transient structures.
  • Conventional electron microscopy struggles with complex 3D nanostructures.

Purpose of the Study:

  • Investigate transient structures during multiply twinned particle growth.
  • Reveal the atomic-scale 3D structure of a shape-transitioning palladium nanoparticle.
  • Understand the mechanism of shape transformation in nanoparticles.

Main Methods:

  • Employed atomic electron tomography (AET).
  • Analyzed over 20,000 atoms and their crystallographic environments.
  • Studied a palladium nanoparticle undergoing shape transition.

Main Results:

  • Observed a multiply twinned structure during shape transition.
  • Identified a simultaneous successive twinning process.
  • Characterized the transformation from decahedral to icosahedral structure.

Conclusions:

  • Atomic electron tomography is effective for studying transient nanostructures.
  • The study provides atomic-level insight into nanoparticle shape evolution.
  • Findings contribute to the controlled synthesis of catalytic nanoparticles.