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A flexible multi-stimuli in situ (S)TEM: concept, optical performance, and outlook
Felix Börrnert1, Heiko Müller2, Thomas Riedel2
1Speziallabor Triebenberg, Technische Universität Dresden, 01062 Dresden, Germany; IFW Dresden, PF 27 01 16, 01171 Dresden, Germany; Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
Ultramicroscopy
|January 28, 2015
Summary
A new in situ scanning transmission electron microscope ((S)TEM) features a large sample chamber for flexible experiments. This advanced instrument offers high-resolution imaging and mapping capabilities for functional materials research.
Area of Science:
- Materials Science
- Microscopy
- Physics
Background:
- Advancements in scanning transmission electron microscopy ((S)TEM) provide atomic-level insights into functional materials.
- Electron holography offers sub-nanometer scale mapping of electric and magnetic potentials.
- In situ (S)TEM studies are limited by small sample spaces and restricted accessibility.
Purpose of the Study:
- To introduce a novel in situ (S)TEM concept with a large sample chamber.
- To evaluate the electron optical performance of this new instrument.
- To enable flexible multi-stimuli experimental setups within the (S)TEM.
Main Methods:
- Development of a dedicated in situ (S)TEM with an enlarged sample chamber.
- Characterization of electron optical performance, including resolving power.
- Assessment of the usable pole piece gap for experimental flexibility.
Main Results:
- Achieved a maximum resolving power of approximately 1 nm in conventional imaging mode.
- Demonstrated a resolving power better than 5 nm in scanning mode.
- Provided an effectively usable pole piece gap of 70 mm, enhancing experimental versatility.
Conclusions:
- The developed in situ (S)TEM facilitates advanced materials research with improved sample accessibility.
- The instrument's performance supports high-resolution imaging and mapping for in situ studies.
- The large sample chamber design enables diverse multi-stimuli experiments at the nanoscale.
