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Title: Comparing Scanning Electron Microscope and Transmission Electron Microscope Grain Mapping Techniques Applied to Well-Defined and Highly Irregular Nanoparticles

Journal Article · · ACS Omega
ORCiD logo [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. Department of Chemistry, Stanford University, Stanford, California 94305, United States
  2. Materials Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
  3. Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, California 94550, United States

Investigating how grain structure affects the functional properties of nanoparticles requires a robust method for nanoscale grain mapping. In this study, we directly compare the grain mapping ability of transmission Kikuchi diffraction (TKD) in a scanning electron microscope to automated crystal orientation mapping (ACOM) in a transmission electron microscope across multiple nanoparticle materials. Analysis of well-defined Au, ZnO, and ZnSe nanoparticles showed that the grain orientations and GB geometries obtained by TKD are accurate and match those obtained by ACOM. For more complex polycrystalline Cu nanostructures, TKD provided an interpretable grain map whereas ACOM, with or without precession electron diffraction, yielded speckled, uninterpretable maps with orientation errors. Acquisition times for TKD were generally shorter than those for ACOM. Our results validate the use of TKD for characterizing grain orientation and grain boundary distributions in nanoparticles, providing a framework for the broader exploration of how microstructure influences nanoparticle properties.

Research Organization:
Stanford Univ., CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; CHE-1565945; ECCS-1542152
OSTI ID:
1600045
Alternate ID(s):
OSTI ID: 1600656; OSTI ID: 1647448
Report Number(s):
LLNL-JRNL-752167
Journal Information:
ACS Omega, Journal Name: ACS Omega Vol. 5 Journal Issue: 6; ISSN 2470-1343
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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