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Published on: September 14, 2018
Environmental transmission electron microscopy in an aberration-corrected environment
Thomas W Hansen1, Jakob B Wagner
1Center for Electron Nanoscopy, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark. twh@cen.dtu.dk
Summary
Environmental transmission electron microscopy (ETEM) allows new insights into materials science by studying gas-sample interactions. This research investigated how gas atmospheres affect high-resolution imaging and spectroscopy in ETEM.
Area of Science:
- Materials Science
- Analytical Chemistry
- Physics
Background:
- Environmental transmission electron microscopy (ETEM) is increasingly used in materials science.
- Understanding gas-sample interactions is crucial for chemical reactions and imaging.
- Gas in the microscope's pole-piece gap affects electron waves and imaging.
Purpose of the Study:
- To investigate the effects of gas presence on imaging and spectroscopy in ETEM.
- To understand how gas atmospheres influence high-resolution electron microscopy.
- To explore new possibilities in materials science research using ETEM.
Main Methods:
- Utilized an FEI Titan environmental transmission electron microscope.
- Employed a monochromator and aberration corrector on the objective lens.
- Investigated the impact of a gaseous atmosphere within the microscope's pole-piece gap.
Main Results:
- The presence of gas in the environmental cell alters both incoming and outgoing electron waves.
- Gas is not spatially localized, filling the entire pole-piece gap.
- Observed significant effects on high-resolution imaging and spectroscopy due to the gas atmosphere.
Conclusions:
- ETEM offers novel approaches for studying chemical reactions and electron-gas interactions.
- The gaseous environment significantly impacts electron wave propagation and imaging.
- Further research with ETEM can advance materials science and chemical analysis.
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