4 papers · 1 filter
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…
High-resolution remote thermography using luminescent low-dimensional tin-halide perovskites
Sergii Yakunin, Bogdan M. Benin, Yevhen Shynkarenko +6
While metal-halide perovskites have recently revolutionized research in optoelectronics through a unique combination of performance and synthetic simplicity, their low-dimensional…
Direct visualization of the 3D structure of silicon impurities in graphene
Christoph Hofer, Viera Skakalova, Mohammad Reza Ahmadpour Monazam +4
We directly visualize the three-dimensional (3D) geometry and dynamics of silicon impurities in graphene as well as their dynamics by aberration-corrected scanning transmission ele…
Revealing the 3D Structure of Graphene Defects
Christoph Hofer, Christian Kramberger, Mohammad Reza Ahmadpour Monazam +5
We demonstrate insights into the three-dimensional structure of defects in graphene, in particular grain boundaries, obtained via a new approach from two transmission electron micr…