BIOMAT Database Logo BIOMAT Database Logo

Direct imaging of electron density with a scanning transmission electron microscope. 2023

Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA. dyckoe@ornl.gov.

Recent studies of secondary electron (SE) emission in scanning transmission electron microscopes suggest that material's properties such as electrical conductivity, connectivity, and work function can be probed with atomic scale resolution using a technique known as secondary electron e-beam-induced current (SEEBIC). Here, we apply the SEEBIC imaging technique to a stacked 2D heterostructure device to reveal the spatially resolved electron density of an encapsulated WSe2 layer. We find that the double Se lattice site shows higher emission than the W site, which is at odds with first-principles modelling of valence ionization of an isolated WSe2 cluster. These results illustrate that atomic level SEEBIC contrast within a single material is possible and that an enhanced understanding of atomic scale SE emission is required to account for the observed contrast. In turn, this suggests that, in the future, subtle information about interlayer bonding and the effect on electron orbitals could be directly revealed with this technique.

UI MeSH Term Description Entries

Related Publications

Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Direct-write liquid phase transformations with a scanning transmission electron microscope.
August 2016, Nanoscale,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Transmission imaging with a programmable detector in a scanning electron microscope.
January 2019, Ultramicroscopy,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Angularly-selective transmission imaging in a scanning electron microscope.
August 2016, Ultramicroscopy,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Imaging of biological structures with the scanning transmission electron microscope.
August 1984, Journal of ultrastructure research,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Transmission imaging on a scintillator in a scanning electron microscope.
November 2020, Ultramicroscopy,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
On the Progress of Scanning Transmission Electron Microscopy (STEM) Imaging in a Scanning Electron Microscope.
April 2018, Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Contrast and resolution of scanning transmission electron microscope imaging modes.
January 1986, Ultramicroscopy,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Dark field imaging of biological macromolecules with the scanning transmission electron microscope.
March 1979, Proceedings of the National Academy of Sciences of the United States of America,
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
High spatiotemporal-resolution imaging in the scanning transmission electron microscope.
July 2020, Microscopy (Oxford, England),
Ondrej Dyck, and Jawaher Almutlaq, and David Lingerfelt, and Jacob L Swett, and Mark P Oxley, and Bevin Huang, and Andrew R Lupini, and Dirk Englund, and Stephen Jesse
Scanning Transmission Electron Microscopy in a Scanning Electron Microscope for the High-Throughput Imaging of Biological Assemblies.
August 2022, Biomacromolecules,
Copied contents to your clipboard!