Results 11 to 20 of about 230,641 (260)

Orientation mapping of graphene using 4D STEM-in-SEM [PDF]

Ultramicroscopy, 2020
A scanning diffraction technique is implemented in the scanning electron microscope. The technique, referred to as 4D STEM-in-SEM (four-dimensional scanning transmission electron microscopy in the scanning electron microscope), collects a diffraction pattern from each point on a sample which is saved to disk for further analysis.
Benjamin W, Caplins, Jason D, Holm, Ryan M, White, Robert R, Keller   +3 more
openaire   +4 more sources

Optimizing Contrast in Automated 4D STEM Cryotomography

Microscopy and Microanalysis
Abstract 4D STEM is an emerging approach to electron microscopy. While it was developed principally for high-resolution studies in materials science, the possibility to collect the entire transmitted flux makes it attractive for cryomicroscopy in application to life science and radiation-sensitive materials where dose efficiency is of
Shahar Seifer, Peter Kirchweger, Karlina Maria Edel, Michael Elbaum   +3 more
openaire   +3 more sources

Shadow Montage and Cone-Beam Reconstruction in 4D-STEM Tomography

Microscopy and Microanalysis
Abstract Diffraction images in a scanning transmission electron microscope (STEM) provide a real-space projection of the sample at sufficient probe defocus. Such shadow images may be acquired patch by patch in a 4D-STEM setup using a pixelated detector and assembled into a shadow montage.
Shahar Seifer, Lothar Houben, Michael Elbaum   +2 more
openaire   +3 more sources

Patterned probes for high precision 4D-STEM bragg measurements [PDF]

Ultramicroscopy, 2020
Nanoscale strain mapping by four-dimensional scanning transmission electron microscopy (4D-STEM) relies on determining the precise locations of Bragg-scattered electrons in a sequence of diffraction patterns, a task which is complicated by dynamical scattering, inelastic scattering, and shot noise. These features hinder accurate automated computational
Zeltmann, Steven E, Müller, Alexander, Bustillo, Karen C, Savitzky, Benjamin, Hughes, Lauren, Minor, Andrew M, Ophus, Colin   +6 more
openaire   +5 more sources

AutoDisk: Automated diffraction processing and strain mapping in 4D-STEM

Ultramicroscopy, 2022
Development in lattice strain mapping using four-dimensional scanning transmission electron microscopy (4D-STEM) method now offers improved precision and feasibility. However, automatic and accurate diffraction analysis is still challenging due to noise and the complexity of intensity in diffraction patterns.
Sihan Wang, Tim B. Eldred, Jacob G. Smith, Wenpei Gao   +3 more
openaire   +3 more sources

Using a fast hybrid pixel detector for dose-efficient diffraction imaging beam-sensitive organic molecular thin films

JPhys Materials, 2023
We discuss the benefits and showcase the applications of using a fast, hybrid-pixel detector (HPD) for 4D-STEM experiments and emphasize that in diffraction imaging the structure of molecular nano-crystallites in organic solar cell thin films with a dose-
Mingjian Wu, Daniel G Stroppa, Philipp Pelz, Erdmann Spiecker   +3 more
doaj   +1 more source

Real‐Space Observation of Potential Reconstruction at Metallic/Insulating Oxide Interface

Advanced Materials Interfaces, 2023
Electric field reconstruction at interfaces plays a crucial role in device performances controlling, for example, Schottky potential barrier and interfacial Rashba effect.
Qingxuan Jia, Alexandre Gloter
doaj   +1 more source

Low-dose cryo-electron ptychography of proteins at sub-nanometer resolution [PDF]

Nature Communications
Cryo-transmission electron microscopy (cryo-EM) of frozen hydrated specimens is an efficient method for the structural analysis of purified biological molecules.
Berk Küçükoğlu, Inayathulla Mohammed, Ricardo C. Guerrero-Ferreira, Stephanie M. Ribet, Georgios Varnavides, Max Leo Leidl, Kelvin Lau, Sergey Nazarov, Alexander Myasnikov, Massimo Kube, Julika Radecke, Carsten Sachse, Knut Müller-Caspary, Colin Ophus, Henning Stahlberg   +14 more
doaj   +2 more sources

4D Self‐Morphing Culture Substrate for Modulating Cell Differentiation

Advanced Science, 2020
As the most versatile and promising cell source, stem cells have been studied in regenerative medicine for two decades. Currently available culturing techniques utilize a 2D or 3D microenvironment for supporting the growth and proliferation of stem cells.
Shida Miao, Haitao Cui, Timothy Esworthy, Bhushan Mahadik, Se‐jun Lee, Xuan Zhou, Sung Yun Hann, John P. Fisher, Lijie Grace Zhang   +8 more
doaj   +1 more source

4D-STEM Optical Sectioning of Dopants in Diamond [PDF]

BIO Web of Conferences
Horne Aidan, Lewis Jacob, Tegegne Emmanuel, Wang Peng   +3 more
doaj   +2 more sources