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physics.app-ph2023
On central focusing for contrast optimization in direct electron ptychography of thick samples
C. Gao, C. Hofer, T. J. Pennycook
Ptychography provides high dose efficiency images that can reveal light elements next to heavy atoms. However, despite ptychography having an otherwise single signed contrast trans…
physics.app-ph2022★ 22 cited
Overcoming contrast reversals in focused probe ptychography of thick materials: an optimal pipeline for efficiently determining local atomic structure in materials science
C. Gao, C. Hofer, D. Jannis +3
Ptychography provides highly efficient imaging in scanning transmission electron microscopy (STEM), but questions have remained over its applicability to strongly scattering sample…
physics.app-ph2021
Picometer-precision few-tilt ptychotomography of 2D materials
Christoph Hofer, Kimmo Mustonen, Viera Skakalova +1
From ripples to defects, edges and grain boundaries, the 3D atomic structure of 2D materials is critical to their properties. However the damage inflicted by conventional 3D analys…