Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 52: New Methods: Experiment
O 52.3: Poster
Tuesday, March 18, 2025, 18:00–20:00, P2
ESEM Automation - Advanced Acquisition & Dual Magnification — •Maurits Vuijk1, Annika Kubsch1, Johannes Zeininger2, Karsten Reuter1, Thomas Lunkenbein1, and Christoph Scheurer1 — 1Fritz-Haber-Institut der MPG, Berlin — 2TU Wien
In Environmental Scanning Electron Microscopy (ESEM) experiments, the acquisition parameters are generally kept constant throughout the collection of the data set. This requires human supervision and limits data collection to one data set at a time. We use a custom automation interface to minimize supervision and allow for the collection of multiple simultaneous data sets containing complementary information.
Slow oscillatory dynamics are observed on a Co surface under hydrogen and oxygen dosing conditions using traditional ESEM. With our automation interface, we can implement more advanced acquisition programs into the microscope that take advantage of different time scales of the surface dynamics. By using automation to change the settings of the acquisition after each frame, we are able to capture multiple interlaced views of the same process. In this case, we alternated between two different magnification values, allowing us to capture a low magnification overview of the propagation of the surface dynamics and a high magnification view of the ongoing local structural changes to a selected surface feature. Many acquisition parameters such as gun voltage, stage position or focus can be automatically adjusted in an intelligent fashion, allowing for more complex acquisition strategies to unravel complex dynamic processes.
Keywords: Electron microscopy; automation; ESEM; catalysis