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Bragg Coherent Modulation Imaging of Highly Strained Nanocrystals
Jiangtao Zhao1, Ewen Bellec2, Marie-Ingrid Richard2
1ESRF, The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France.
Physical Review Letters
|January 20, 2026
Summary
Bragg coherent diffraction imaging now works for nanocrystals with high strain variations. Bragg coherent modulation imaging resolves these challenges, enabling precise 3D lattice strain measurements.
Area of Science:
- Materials Science
- Crystallography
- Diffraction Imaging
Background:
- Bragg coherent diffraction imaging (BCDI) is limited by strain inhomogeneities in nanocrystals.
- This limitation restricts BCDI applications in various scientific fields.
Purpose of the Study:
- To overcome the limitations of BCDI for nanocrystals with large strain variations.
- To introduce and demonstrate Bragg coherent modulation imaging (BCMI).
Main Methods:
- Incorporated wavefront modulation into the diffracted beam.
- Applied BCMI to nanocrystals with significant strain inhomogeneities.
Main Results:
- Achieved unambiguous structure recovery in highly strained nanocrystals.
- Demonstrated the experimental realization of BCMI.
Conclusions:
- BCMI offers a robust solution for analyzing nanocrystals with large strain variations.
- This method enhances the capability for precise 3D lattice strain measurements in nanocrystals.
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