Results 31 to 40 of about 2,568,206 (333)

Imaging the electron charge density in monolayer MoS2 at the Ångstrom scale

Nature Communications, 2023
Four-dimensional scanning transmission electron microscopy (4D-STEM) has recently gained widespread attention for its ability to image atomic electric fields with sub-Ångstrom spatial resolution.
Joel Martis, Sandhya Susarla, Archith Rayabharam, Cong Su, Timothy Paule, Philipp Pelz, Cassandra Huff, Xintong Xu, Hao-Kun Li, Marc Jaikissoon, Victoria Chen, Eric Pop, Krishna Saraswat, Alex Zettl, Narayana R. Aluru, Ramamoorthy Ramesh, Peter Ercius, Arun Majumdar   +17 more
doaj   +1 more source

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

Contrast Optimization Aided by Machine Learning Applied to Virtual 4D-STEM Images [PDF]

BIO Web of Conferences
Stroppa Daniel, dos Reis Roberto
doaj   +2 more sources

Pre-processed raw data of 4D-SCED 4D-STEM(NBD) datasets

, 2022
The raw 4D-SCED and 4D-STEM (NBD) datasets in our paper: Seeing Structural Evolution of Organic Molecular Nano-crystallites Using 4D Scanning Confocal Electron Diffraction https://arxiv.org/abs/2110.02373v1 Dose-damage_RT_and_Cryo_DRCN5T_PCBM.zip -
Harreiss, Christina, Wu, Mingjian
core   +1 more source

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

Nanoscale mapping of point defect concentrations with 4D-STEM

, 2022
The following 4D-STEM data sets were collected on the ThemIS and TitanX scanning transmission electron microscopes located at the National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Zeltmann, Steven E, Minor, Andrew M, Kohnert, Aaron, Uberuaga, Blas P, Uberuaga, Blas, Mills, Sean H, Mills, Sean, Ercius, Peter, Kohnert, Aaron A, Minor, Andrew, Zeltmann, Steven   +10 more
core   +1 more source

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