4D scanning transmission electron microscopy - Wikipedia
WEB4D scanning transmission electron microscopy (4D STEM) is a subset of scanning transmission electron microscopy (STEM) which utilizes a pixelated electron detector to capture a convergent beam electron diffraction (CBED) pattern at each scan location.
4D STEM | Gatan, Inc.
WEBWhat is 4D STEM? In scanning transmission electron microscopy (STEM), the electron beam is focused on an electron transparent specimen to make a probe from a few nanometers down to nearly atomic dimensions.
4D-STEM Ptychography for Electron-Beam-Sensitive Materials
WEBNov 21, 2022 · A critical application of 4D-STEM is electron ptychography, which reveals the atomic structure of a specimen by reconstructing its transmission function from redundant convergent-beam electron diffraction patterns.
Analytical 4D-STEM explained | TESCAN TENSOR
WEB4D-STEM (4D Scanning Transmission Electron Microscopy) is an evolution of Scanning Transmission Electron Microscopy. It takes full advantage of innovations in the field of hybrid-pixel, direct electron detectors, to capture an electron diffraction pattern at each pixel in the STEM image.
Four-Dimensional Scanning Transmission Electron Microscopy (4D-STEM …
WEBMay 14, 2019 · In this paper, we review the use of these four-dimensional STEM experiments for virtual diffraction imaging, phase, orientation and strain mapping, measurements of medium-range order, thickness and tilt of samples, and phase contrast imaging methods, including differential phase contrast, ptychography, and others.
What is 4D STEM? - Blue Scientific
WEBApr 3, 2020 · 4D STEM is an electron microscopy technique that captures a full 2D diffraction pattern at each pixel position on a STEM (Scanning Transmission Electron Microscopy) map. Here’s an overview of 4D STEM techniques, including: Virtual imaging. Orientation mapping.
From STEM to 4D STEM: Ultrafast Diffraction Mapping with a …
WEBApr 12, 2023 · 4D scanning transmission electron microscope (STEM) techniques have been increasingly featured among the electron microscopy characterization approaches, as they provide a perspective of improved information retrieval from samples overall.
Manifold learning of four-dimensional scanning transmission electron ...
WEBJan 7, 2019 · Four-dimensional scanning transmission electron microscopy (4D-STEM) of local atomic diffraction patterns is emerging as a powerful technique for probing intricate details of atomic...
Unsupervised machine learning combined with 4D scanning …
WEBFeb 5, 2024 · Electron diffraction with a nanometer incident probe can be used to crystallographically characterize inhomogeneous materials 8. 4D-STEM provides bimodal information from real (x, y) and...
Seeing structural evolution of organic molecular nano ... - Nature
WEBMay 25, 2022 · Diffraction imaging, also called four dimensional-scanning transmission electron microscopy (4D-STEM) 8, or nano-beam diffraction (NBD), with a small convergence angle α has recently...