59 citations · 96 across the 17 of their papers we have counts for
17 papers
Updated all-electron Dirac--Fock densities and an element-adaptive parameterisation of scattering factors and potentials for neutral atoms
Ivan Lobato, Zezhong Zhang, Sandra Van Aert +1
Updated reference data and an analytic parameterisation of elastic electron and X-ray scattering are presented for all 118 neutral atoms. The reference electron densities for the m…
Detective Quantum Efficiency of the Timepix4 Hybrid Pixel Detector and its Application to Parallel-Beam Diffraction
Zhiyuan Ding, Nina Dimova, Jonathan S. Barnard +6
The detective quantum efficiency (DQE) and normalised noise power spectrum (NNPS) of the Timepix4 hybrid pixel detector in event-driven mode in TEM have been measured at 100 kV and…
Physics-Informed 3D Atomic Reconstruction and Dynamics of Free-Standing Graphene from Single Low-Dose TEM Images
Xiaojun Zhang, Shih-Wei Hung, Yawei Wu +4
Resolving the three-dimensional (3D) atomic geometry of free-standing graphene in real time is essential for understanding how intrinsic rippling governs its electronic properties.…
Atomic resolution imaging of the strength and 3D direction of atomic displacements in functional oxide thin films
Ian MacLaren, Aurys Silinga, Juri Barthel +4
Atomic resolution imaging is key to understanding thin film growth and how a particular set of conditions influences properties. Whilst such imaging in the scanning transmission el…
A high-performance reconstruction method for partially coherent ptychography
Wenhui Xu, Shoucong Ning, Pengju Sheng +4
Ptychography is now integrated as a tool in mainstream microscopy allowing quantitative and high-resolution imaging capabilities over a wide field of view. However, its ultimate pe…
Calibrating coordinate system alignment in a scanning transmission electron microscope using a digital twin
Dieter Weber, David Landers, Chen Huang +9
In four-dimensional scanning transmission electron microscopy (4D STEM) a focused beam is scanned over a specimen and a diffraction pattern is recorded at each position using a pix…
Cryo-Electron Ptychography: Applications and Potential in Biological Characterisation
Chen Huang, Judy S. Kim, Angus I. Kirkland
There is a clear need for developments in characterisation techniques that provide detailed information about structure-function relationships in biology. Using electron microscopy…
Simultaneous High-Speed and Low-Dose 4-D STEM Using Compressive Sensing Techniques
Alex W. Robinson, Amirafshar Moshtaghpour, Jack Wells +5
Here we show that compressive sensing allow 4-dimensional (4-D) STEM data to be obtained and accurately reconstructed with both high-speed and low fluence. The methodology needed t…
Scan Coil Dynamics Simulation for Subsampled Scanning Transmission Electron Microscopy
Daniel Nicholls, Jack Wells, Alex W. Robinson +3
Subsampling and fast scanning in the scanning transmission electron microscope is problematic due to scan coil hysteresis - the mismatch between the actual and assumed location of…
In silico Ptychography of Lithium-ion Cathode Materials from Subsampled 4-D STEM Data
Alex W. Robinson, Amirafshar Moshtaghpour, Jack Wells +5
High quality scanning transmission electron microscopy (STEM) data acquisition and analysis has become increasingly important due to the commercial demand for investigating the pro…
A Targeted Sampling Strategy for Compressive Cryo Focused Ion Beam Scanning Electron Microscopy
Daniel Nicholls, Jack Wells, Alex W. Robinson +5
Cryo Focused Ion-Beam Scanning Electron Microscopy (cryo FIB-SEM) enables three-dimensional and nanoscale imaging of biological specimens via a slice and view mechanism. The FIB-SE…
SIM-STEM Lab: Incorporating Compressed Sensing Theory for Fast STEM Simulation
Alex W. Robinson, Daniel Nicholls, Jack Wells +3
Recently it has been shown that precise dose control and an increase in the overall acquisition speed of atomic resolution scanning transmission electron microscope (STEM) images c…
Compressive Scanning Transmission Electron Microscopy
Daniel Nicholls, Alex Robinson, Jack Wells +4
Scanning Transmission Electron Microscopy (STEM) offers high-resolution images that are used to quantify the nanoscale atomic structure and composition of materials and biological…
Oleylamine aging of PtNi nanoparticles giving enhanced functionality for the oxygen reduction reaction
Gerard M Leteba, Yi-Chi Wang, Thomas J A Slater +10
We report a rapid solution-phase strategy to synthesize alloyed PtNi nanoparticles which demonstrate outstanding functionality for the oxygen reduction reaction (ORR). This one-pot…
Quantifying the Performance of a Hybrid Pixel Detector with GaAs:Cr Sensor for Transmission Electron Microscopy
Kirsty A. Paton, Matthew C. Veale, Xiaoke Mu +6
Hybrid pixel detectors (HPDs) have been shown to be highly effective for diffraction-based and time-resolved studies in transmission electron microscopy, but their performance is l…
Medipix3 Demonstration and understanding of near ideal detector performance for 60 & 80 keV electrons
J. A. Mir, R. Clough, R. MacInnes +10
In our article we report first quantitative measurements of imaging performance for the current generation of hybrid pixel detector, Medipix3, as direct electron detector. Utilisin…
Optimized conditions for direct imaging of bonding charge density in electron microscopy
James Ciston, Sarah J. Haigh, Judy S. Kim +2
We report on the observability of valence bonding effects in aberration-corrected high resolution electron microscopy (HREM) images along the [010] projection of the mineral Forste…