Electron ptychographic phase imaging of light elements in crystalline materials using Wigner distribution deconvolution
Not Available
36 MATERIALS SCIENCE↗
Engineering topics
Soltau, Heike
Publications and source records attributed to Soltau, Heike.
Single-shot diffraction data from the Mimivirus particle using an X-ray free-electron laser
Free-electron lasers (FEL) hold the potential to revolutionize structural biology by producing X-ray pules short enough to outrun radiation damage, thus allowing imaging of biological samples without the limitation from radiation damage. Thus, a major part of the scientific case for the first FELs was three-dimensional (3D) reconstruction of non-crystalline biological objects. In a recent publication we demonstrated the first 3D reconstruction of a biological object from an X-ray FEL using this technique. The sample was the giant Mimivirus, which is one of the largest known viruses with a diameter of 450 nm. Here we present the dataset used for this successful reconstruction. Data-analysis methods for single-particle imaging at FELs are undergoing heavy development but data collection relies on very limited time available through a highly competitive proposal process. This dataset provides experimental data to the entire community and could boost algorithm development and provide a benchmark dataset for new algorithms.
59 BASIC BIOLOGICAL SCIENCES↗
Femtosecond and nanometre visualization of structural dynamics in superheated nanoparticles
Explore the source record for details and available documents.
Gorkhover, Tais↗
Scanning transmission electron microscopy strain measurement from millisecond frames of a direct electron charge coupled device
A high-speed direct electron detection system is introduced to the field of transmission electron microscopy and applied to strain measurements in semiconductor nanostructures. In particular, a focused electron probe with a diameter of 0.5 nm was scanned over a fourfold quantum layer stack with alternating compressive and tensile strain and diffracted discs have been recorded on a scintillator-free direct electron detector with a frame time of 1 ms. We show that the applied algorithms can accurately detect Bragg beam positions despite a significant point spread each 300 kV electron causes during detection on the scintillator-free camera. For millisecond exposures, we find that strain can be measured with a precision of 1.3 Multiplication-Sign 10{sup -3}, enabling, e.g., strain mapping in a 100 Multiplication-Sign 100 nm{sup 2} region with 0.5 nm resolution in 40 s.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗