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Related Experiment Video

Updated: May 29, 2025

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Sub-nanometer depth resolution and single dopant visualization achieved by tilt-coupled multislice electron

Zehao Dong1, Yang Zhang1, Chun-Chien Chiu2

  • 1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China.

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|January 31, 2025
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Summary
This summary is machine-generated.

This study introduces a new 3D imaging method using electron ptychography to achieve sub-nanometer depth resolution for atomic structures. The technique enhances dopant detection and visualization in materials science.

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Area of Science:

  • Materials Science
  • Physics
  • Chemistry

Background:

  • Real-space, 3D atomic imaging is crucial but challenging.
  • Current electron microscopy methods offer limited depth resolution (2-3 nm).
  • Atomic electron tomography requires extensive sample tilting and projections.

Purpose of the Study:

  • To improve depth resolution in 3D atomic imaging.
  • To enable visualization of individual dopants and lattice distortions.
  • To develop a practical technique for widely available electron microscopes.

Main Methods:

  • Extension of multislice electron ptychography.
  • Utilizes a few small-angle projections.
  • Coupled with hybrid pixel detectors and high-performance computing.

Main Results:

  • Achieved depth resolution improvement of over threefold, reaching sub-nanometer scale.
  • Maintained high resolving power for both light and heavy atoms.
  • Successfully visualized dilute praseodymium dopants in Ca2Co2O5 and lattice distortions.

Conclusions:

  • The developed technique significantly enhances 3D atomic imaging capabilities.
  • It offers a pathway to atomic-level depth resolution.
  • This method is applicable to a wide range of materials and dopant studies.