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Combining Laue diffraction with Bragg coherent diffraction imaging at 34-ID-C.

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Summary
This summary is machine-generated.

This study introduces a new instrument for multi-reflection Bragg coherent diffraction imaging (BCDI). It enables rapid determination of crystal orientation and full 3D strain tensor imaging from single nanocrystals.

Keywords:
BCDIBragg diffractionLaue diffractionstrain imaging

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Area of Science:

  • Materials Science
  • Crystallography
  • Nanotechnology

Background:

  • Bragg coherent diffraction imaging (BCDI) typically analyzes single nanocrystals, but determining crystal orientation and locating other Bragg reflections is challenging.
  • Existing methods for nanocrystal orientation determination in BCDI are time-consuming and require prior crystallographic knowledge.

Purpose of the Study:

  • To develop and commission a novel instrument for multi-reflection BCDI at the Advanced Photon Source.
  • To enable rapid determination of crystal orientation and full 3D strain tensor imaging of individual nanocrystals.

Main Methods:

  • Commissioning a movable double-bounce Si (111) monochromator for multi-reflection BCDI.
  • Utilizing rapid switching between monochromatic and broadband (pink) beams for Laue diffraction.
  • Developing procedures for indexing Laue patterns and automated multi-reflection data acquisition.

Main Results:

  • Successful implementation of multi-reflection BCDI as a standard tool within a single beamline.
  • Demonstrated capability to determine crystal orientation using Laue diffraction.
  • Enabled measurement of coherent diffraction patterns near multiple Bragg peaks for comprehensive 3D strain tensor imaging.

Conclusions:

  • The new instrument significantly enhances the capabilities of BCDI for nanocrystal analysis.
  • Facilitates efficient and accurate 3D strain tensor imaging by overcoming orientation determination challenges.
  • Establishes multi-reflection BCDI as a powerful technique for nanoscale materials characterization.