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Title: Identifying Defects with Guided Algorithms in Bragg Coherent Diffractive Imaging

Journal Article · · Scientific Reports
ORCiD logo [1];  [1];  [2];  [2];  [1];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. Grenoble Alpes, Grenoble (France)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland)

In this study, crystallographic defects such as dislocations can significantly alter material properties and functionality. However, imaging these imperfections during operation remains challenging due to the short length scales involved and the reactive environments of interest. Bragg coherent diffractive imaging (BCDI) has emerged as a powerful tool capable of identifying dislocations, twin domains, and other defects in 3D detail with nanometer spatial resolution within nanocrystals and grains in reactive environments. However, BCDI relies on phase retrieval algorithms that can fail to accurately reconstruct the defect network. Here, we use numerical simulations to explore different guided phase retrieval algorithms for imaging defective crystals using BCDI. We explore different defect types, defect densities, Bragg peaks, and guided algorithm fitness metrics as a function of signal-to-noise ratio. Based on these results, we offer a general prescription for phasing of defective crystals with no a prior knowledge.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1395865
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (6)

Nano-scale imaging of the full strain tensor of specific dislocations extracted from a bulk sample text January 2019
Free log-likelihood as an unbiased metric for coherent diffraction imaging text January 2019
Nucleation-Controlled Plasticity of Metallic Nanowires and Nanoparticles journal July 2018
Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging journal April 2019
Bragg coherent diffraction imaging of iron diffusion into gold nanocrystals journal November 2018
Nanoscale imaging of the full strain tensor of specific dislocations extracted from a bulk sample journal January 2020

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