Explanipedia

Quantitative Structure Determination from Experimental Four-Dimensional Scanning Transmission Electron Microscopy via the Scattering Matrix Open

Emmanuel W C Terzoudis-Lumsden, Alireza Sadri, Matthew Weyland, Laure Bourgeois, Stephanie M. Ribet , et al. · 2025

Considerable inroads have recently been made on algorithms to determine the sample potential from four-dimensional scanning transmission electron microscopy data from thick samples where multiple scattering cannot be neglected. This paper …

T1 precipitate stacks in an Al-Cu-Li-Mg-Ag alloy Open

Sasha Yang, Nick Wilson, Zezhong Zhang, Laure Bourgeois, Bryan D. Esser , et al. · 2025

Dopant site occupancy determined by core-loss-filtered, position-averaged convergent beam electron diffraction Open

Michael Deimetry, Timothy C. Petersen, Matthew Weyland, Scott D. Findlay · 2025

In the elastic scattering regime, probe position-averaged convergent beam electron diffraction (PACBED) patterns have proven robust for estimating specimen thickness and mistilt. Through simulation, we show that core-loss-filtered PACBED p…

Quantitative structure determination from experimental four-dimensional scanning transmission electron microscopy via the scattering matrix Open

Emmanuel Terzoudis-Lumsden, Alireza Sadri, Matthew Weyland, Laure Bourgeois, Stephanie M. Ribet , et al. · 2025

Considerable inroads have recently been made on algorithms to determine the sample potential from four-dimensional scanning transmission electron microscopy data from thick samples where multiple scattering cannot be neglected. This paper …

Real-space observation of polarization induced charges at nanoscale ferroelectric interfaces Open

Masaya Takamoto, S. Tōyama, Takehito Seki, Toshihiro Futazuka, Scott D. Findlay , et al. · 2025

Unique electrical properties emerging at nanoscale ferroelectric interfaces originate from the polarization induced charges. However, real-space characterization of polarization induced charges at nanoscale ferroelectric interfaces has bee…

Locating the Atoms at the Hard-soft Interface of Gold Nanoparticles Open

Weilun Li, Bryan D. Esser, Wenming Tong, Anchal Yadav, Colin Ophus , et al. · 2025

Surface structure affects the growth, shape and properties of nanoparticles. In wet chemical syntheses, metal additives and surfactants are used to modify surfaces and guide nanocrystal growth. To understand this process, it is critical to…

Phase Contrast via the Scattering Matrix Formulation of 4D Scanning Transmission Electron Microscopy Open

Scott D. Findlay · 2025

Unsupervised Deep Denoising for Low-Dose 4D-STEM Open

Alireza Sadri, Timothy C. Petersen, Emmanuel Terzoudis-Lumsden, Bryan D. Esser, Joanne Etheridge , et al. · 2025

Counting Atoms in Gold Nanoparticles Using Low Dose Four-Dimensional Scanning Electron Microscopy with Supervised Machine Learning Open

Cheng Zhao, Alireza Sadri, Bryan D. Esser, Zhen‐Shen Liew, Alison M. Funston , et al. · 2025

Experimental Crystal Structure From 4D STEM via the Scattering Matrix Open

Emmanuel Terzoudis-Lumsden, Amir Reza Sadri, Matthew Weyland, Laure Bourgeois, Stephanie M. Ribet , et al. · 2025

Improved Three-Dimensional Reconstructions in Electron Ptychography through Defocus Series Measurements Open

Marcel Schloz, Thomas C. Pekin, Hamish G. Brown, Dana O. Byrne, Bryan D. Esser , et al. · 2024

A detailed analysis of ptychography for three-dimensional (3D) phase reconstructions of thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality of 3D reconstru…

Unsupervised deep denoising for four-dimensional scanning transmission electron microscopy Open

Alireza Sadri, Timothy C. Petersen, Emmanuel Terzoudis-Lumsden, Bryan D. Esser, Joanne Etheridge , et al. · 2024

By simultaneously achieving high spatial and angular sampling resolution, four dimensional scanning transmission electron microscopy (4D STEM) is enabling analysis techniques that provide great insight into the atomic structure of material…

Differential phase contrast from electrons that cause inner shell ionization Open

Michael Deimetry, Timothy C. Petersen, Hamish G. Brown, Matthew Weyland, Scott D. Findlay · 2024

Towards atom counting from first moment STEM images: methodology and possibilities Open

Yansong Hao, Annick De Backer, Scott D. Findlay, Sandra Van Aert · 2024

Through a simulation-based study we develop a statistical model-based quantification method for atomic resolution first moment scanning transmission electron microscopy (STEM) images. This method uses the uniformly weighted least squares e…

Improved Three-Dimensional Reconstructions in Electron Ptychography through Defocus Series Measurements Open

Marcel Schloz, Thomas C. Pekin, Hamish G. Brown, Dana O. Byrne, Bryan D. Esser , et al. · 2024

A detailed analysis of ptychography for 3D phase reconstructions of thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality of 3D reconstructions along the bea…

Direct Imaging of Atomic Rattling Motion in a Clathrate Compound Open

Koudai Tabata, Takehito Seki, Scott D. Findlay, Ryo Ishikawa, Ryuji Tamura , et al. · 2024

Controlling nanoscale heat generation, dissipation, and transport is crucial for miniaturizing electronic devices and for designing highly efficient thermoelectric materials. However, it has been challenging to directly measure thermal pro…

Atom-counting for heterogeneous nanostructures using multimodal STEM Open

Annick De Backer, Zezhong Zhang, Ana Sánchez‐Iglesias, Luis M. Liz‐Marzán, Peter D. Nellist , et al. · 2024

Resolution of Virtual Depth Sectioning from Four-Dimensional Scanning Transmission Electron Microscopy Open

Emmanuel Terzoudis-Lumsden, Timothy C. Petersen, Hamish G. Brown, Philipp Pelz, Colin Ophus , et al. · 2023

One approach to three-dimensional structure determination using the wealth of scattering data in four-dimensional (4D) scanning transmission electron microscopy (STEM) is the parallax method proposed by Ophus et al. (2019. Advanced phase r…

Determining the Projected Crystal Structure from Four-dimensional Scanning Transmission Electron Microscopy via the Scattering Matrix Open

Alireza Sadri, Scott D. Findlay · 2023

We present a gradient-descent-based approach to determining the projected electrostatic potential from four-dimensional scanning transmission electron microscopy measurements of a periodic, crystalline material even when dynamical scatteri…

P281: Incorporating regulatory information improves interpretation of noncoding variants* Open

Lindsay Romo, Scott D. Findlay, Christopher B. Burge · 2023

The Effect of Dynamical Scattering on Single-plane Phase Retrieval in Electron Ptychography Open

Laura Clark, Gerardo Martínez, Colum M. O’Leary, Hao Yang, Zhiyuan Ding , et al. · 2022

Segmented and pixelated detectors on scanning transmission electron microscopes enable the complex specimen transmission function to be reconstructed. Imaging the transmission function is key to interpreting the electric and magnetic prope…

A Three-Dimensional Reconstruction Algorithm for Scanning Transmission Electron Microscopy Data from a Single Sample Orientation Open

Hamish G. Brown, Philipp Pelz, Shang‐Lin Hsu, Zimeng Zhang, R. Ramesh , et al. · 2022

Increasing interest in three-dimensional nanostructures adds impetus to electron microscopy techniques capable of imaging at or below the nanoscale in three dimensions. We present a reconstruction algorithm that takes as input a focal seri…

Real-space visualization of intrinsic magnetic fields of an antiferromagnet Open

Yuji Kohno, Takehito Seki, Scott D. Findlay, Yuichi Ikuhara, Naoya Shibata · 2022

Characterizing magnetic structures down to atomic dimensions is central to the design and control of nanoscale magnetism in materials and devices. However, real-space visualization of magnetic fields at such dimensions has been extremely c…

Factors limiting quantitative phase retrieval in atomic-resolution differential phase contrast scanning transmission electron microscopy using a segmented detector Open

T. Mawson, D.J. Taplin, Hamish G. Brown, Laura Clark, Ryo Ishikawa , et al. · 2021

Direct imaging of metal additives on Au nanocube surface using 4D-STEM Open

Weilun Li, Bryan D. Esser, Anchal Yadav, Alison M. Funston, Scott D. Findlay , et al. · 2021

Reaching for atomic-scale quantitative energy dispersive X-ray spectroscopy Open

Katherine E. MacArthur, Andrew B. Yankovich, Armand Béché, M. Luysberg, Hamish G. Brown , et al. · 2021

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Scattering Matrix Determination in Crystalline Materials from 4D Scanning Transmission Electron Microscopy at a Single Defocus Value Open

Scott D. Findlay, Hamish G. Brown, Philipp Pelz, Colin Ophus, Jim Ciston , et al. · 2021

Recent work has revived interest in the scattering matrix formulation of electron scattering in transmission electron microscopy as a stepping stone toward atomic-resolution structure determination in the presence of multiple scattering. W…

Phase-contrast imaging of multiply-scattering extended objects at atomic resolution by reconstruction of the scattering matrix Open

Philipp Pelz, Hamish G. Brown, Scott Stonemeyer, Scott D. Findlay, Alex Zettl , et al. · 2021

Three-dimensional phase contrast imaging of multiply-scattering samples in X-ray and electron microscopy is extremely challenging, due to small numerical apertures, the unavailability of wavefront shaping optics, and the highly nonlinear i…

Optimizing Experimental Conditions for Accurate Quantitative Energy-Dispersive X-ray Analysis of Interfaces at the Atomic Scale Open

Katherine E. MacArthur, Andrew B. Yankovich, Armand Béché, M. Luysberg, Hamish G. Brown , et al. · 2021

Inelastic Scattering in Electron Backscatter Diffraction and Electron Channeling Contrast Imaging Open

Budhika G. Mendis, Juri Barthel, Scott D. Findlay, Leslie J. Allen · 2020

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