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Related Experiment Video

Updated: Jul 28, 2025

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Mapping nanocrystal orientations via scanning Laue diffraction microscopy for multi-peak Bragg coherent diffraction

Yueheng Zhang¹, J Nicholas Porter², Matthew J Wilkin¹

¹Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

Journal of Synchrotron Radiation

|May 31, 2023

Summary

A new method simplifies collecting Bragg coherent diffraction imaging (BCDI) data from multiple nanocrystal peaks. This technique enables precise orientation and mapping of nanocrystals, even in complex, heterogeneous samples.

Keywords:

BCDI Bragg diffraction Laue diffraction synchrotron

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Area of Science:

Materials Science
Crystallography
Nanotechnology

Background:

Bragg coherent diffraction imaging (BCDI) is crucial for analyzing sub-micrometre samples.
Collecting multi-peak BCDI data from multiple nanocrystals is complex.
Heterogeneous samples and multiple grains pose significant challenges.

Purpose of the Study:

To develop a workflow for orienting and mapping nanocrystals on different substrates.
To simplify the collection of BCDI data from multiple Bragg peaks.
To enable 3D imaging of isolated and densely distributed nanocrystals.

Main Methods:

Commissioning a movable monochromator at the Advanced Photon Source (APS) 34-ID-C beamline.
Utilizing scanning Laue diffraction microscopy for nanocrystal orientation and mapping.
Employing iterative phase retrieval algorithms to construct volumetric strain tensors.
Validating results with electron back-scattering diffraction (EBSD) measurements.

Main Results:

A simplified workflow for collecting multi-peak BCDI data was established.
The method accurately orients and maps nanocrystals on different substrate materials.
Experimental texture maps from Laue diffraction microscopy correlate well with EBSD data.
Reliable indexing was achieved for both isolated and densely packed nanocrystals.

Conclusions:

The developed workflow significantly simplifies BCDI data collection for nanocrystals.
Scanning Laue diffraction microscopy provides robust nanocrystal orientation and mapping.
This technique offers a powerful tool for 3D imaging of challenging nanocrystal systems.