skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Automated Crystal Orientation Mapping in py4DSTEM using Sparse Correlation Matching

Journal Article · · Microscopy and Microanalysis

Crystalline materials used in technological applications are often complex assemblies composed of multiple phases and differently oriented grains. Robust identification of the phases and orientation relationships from these samples is crucial, but the information extracted from the diffraction condition probed by an electron beam is often incomplete. We have developed an automated crystal orientation mapping (ACOM) procedure which uses a converged electron probe to collect diffraction patterns from multiple locations across a complex sample. We provide an algorithm to determine the orientation of each diffraction pattern based on a fast sparse correlation method. We demonstrate the speed and accuracy of our method by indexing diffraction patterns generated using both kinematical and dynamical simulations. We have also measured orientation maps from an experimental dataset consisting of a complex polycrystalline twisted helical AuAgPd nanowire. From these maps we identify twin planes between adjacent grains, which may be responsible for the twisted helical structure. All of our methods are made freely available as open source code, including tutorials which can be easily adapted to perform ACOM measurements on diffraction pattern datasets.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
4D Data Distillery; AC02-05CH11231
OSTI ID:
1897785
Alternate ID(s):
OSTI ID: 1891482
Journal Information:
Microscopy and Microanalysis, Journal Name: Microscopy and Microanalysis Vol. 28 Journal Issue: 2; ISSN 1431-9276
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

A Review of Strain Analysis Using Electron Backscatter Diffraction journal March 2011
Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper journal December 2018
Confirmation of the Domino-Cascade Model by LiFePO 4 /FePO 4 Precession Electron Diffraction journal October 2011
Structure Evolution During Processing of Polycrystalline Films journal August 2000
Strategies for fast and reliable 4D-STEM orientation and phase mapping of nanomaterials and devices journal July 2021
Near–atomic-scale observation of grain boundaries in a layer-stacked two-dimensional polymer journal August 2020
The Role of Grain Boundaries in Perovskite Solar Cells journal August 2019
Direct Imaging of Nanoscale Phase Separation in La 0.55 Ca 0.45 MnO 3 : Relationship to Colossal Magnetoresistance journal August 2009
Diffuse interface model for structural transitions of grain boundaries journal January 2006
Free, flexible and fast: Orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the Python-based open source 4D-STEM analysis toolbox Pyxem journal July 2022
Unravelling stacking order in epitaxial bilayer MX 2 using 4D-STEM with unsupervised learning journal August 2020
Efficient Perovskite Light‐Emitting Diodes Using Polycrystalline Core–Shell‐Mimicked Nanograins journal April 2019
Constrained minimal-interface structures in polycrystalline copper with extremely fine grains journal November 2020
Improved strain precision with high spatial resolution using nanobeam precession electron diffraction journal December 2013
An accurate parameterization for scattering factors, electron densities and electrostatic potentials for neutral atoms that obey all physical constraints journal October 2014
Strain mapping at nanometer resolution using advanced nano-beam electron diffraction journal June 2015
Scanning precession electron tomography for three-dimensional nanoscale orientation imaging and crystallographic analysis journal June 2015
Intrinsic helical twist and chirality in ultrathin tellurium nanowires journal January 2021
Lattice Spacings of Gold–Palladium Alloys journal November 1964
Advances in TEM orientation microscopy by combination of dark-field conical scanning and improved image matching journal October 2009
Chromatic Aberration Correction for Atomic Resolution TEM Imaging from 20 to 80 kV journal August 2016
Patterned probes for high precision 4D-STEM bragg measurements journal February 2020
The scattering of electrons by atoms and crystals. I. A new theoretical approach journal October 1957
Four-Dimensional Scanning Transmission Electron Microscopy (4D-STEM): From Scanning Nanodiffraction to Ptychography and Beyond journal May 2019
Large-scale experimental and theoretical study of graphene grain boundary structures journal November 2015
A Comparison of a Direct Electron Detector and a High-Speed Video Camera for a Scanning Precession Electron Diffraction Phase and Orientation Mapping journal September 2020
Automated nanocrystal orientation and phase mapping in the transmission electron microscope on the basis of precession electron diffraction journal January 2010
Multibeam Electron Diffraction journal December 2020
py4DSTEM: A Software Package for Four-Dimensional Scanning Transmission Electron Microscopy Data Analysis journal May 2021
Introduction and comparison of new EBSD post-processing methodologies journal December 2015
Registration of Translated and Rotated Images Using Finite Fourier Transforms journal September 1987
Lattice theory of point defects journal February 1978
Prismatic 2.0 – Simulation software for scanning and high resolution transmission electron microscopy (STEM and HRTEM) journal December 2021
Fast Pixelated Detectors in Scanning Transmission Electron Microscopy. Part I: Data Acquisition, Live Processing, and Storage journal July 2020
Texture development in polycrystalline thin films journal July 1995
Advanced Computing in Electron Microscopy book January 2020
On the accurate measurement of structure-factor amplitudes and phases by electron diffraction journal March 1993
Three-dimensional nanostructure determination from a large diffraction data set recorded using scanning electron nanodiffraction journal July 2016
Automated Crystal Orientation Mapping with a Liquid-Cell TEM journal July 2021
Fast Pixelated Detectors in Scanning Transmission Electron Microscopy. Part II: Post-Acquisition Data Processing, Visualization, and Structural Characterization journal September 2020
Training artificial neural networks for precision orientation and strain mapping using 4D electron diffraction datasets journal March 2021
Optimizing disk registration algorithms for nanobeam electron diffraction strain mapping journal May 2017
Automated Crystal Orientation Mapping by Precession Electron Diffraction-Assisted Four-Dimensional Scanning Transmission Electron Microscopy Using a Scintillator-Based CMOS Detector journal August 2021
Precipitate formation in aluminium alloys: Multi-scale modelling approach journal August 2020
Commentary: The Materials Project: A materials genome approach to accelerating materials innovation journal July 2013
Consistent representations of and conversions between 3D rotations journal October 2015
Precession electron diffraction – a topical review journal January 2015
Towards data-driven next-generation transmission electron microscopy journal October 2020
A fast image simulation algorithm for scanning transmission electron microscopy journal May 2017
High spatial resolution semi-automatic crystallite orientation and phase mapping of nanocrystals in transmission electron microscopes journal April 2011
4D-STEM of Beam-Sensitive Materials journal May 2021
On-line Interpretation of Spot and Kikuchi Patterns journal May 1994
Combination of in situ straining and ACOM TEM: A novel method for analysis of plastic deformation of nanocrystalline metals journal May 2013
Animating rotation with quaternion curves conference January 1985
A critical review of orientation microscopy in SEM and TEM journal May 2011
Simulations of Dislocation Structure and Response journal March 2014
Chiral Transformation: From Single Nanowire to Double Helix journal November 2011
Die Berechnung optischer und elektrostatischer Gitterpotentiale journal January 1921
Stress and strain in polycrystalline thin films journal June 2007
1D to 2D Transition in Tellurium Observed by 4D Electron Microscopy journal November 2020
Twenty years after: How “Aberration correction in the STEM” truly placed a “A synchrotron in a Microscope” journal September 2017
Python Materials Genomics (pymatgen): A robust, open-source python library for materials analysis journal February 2013