SKM 2023 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Instrumentation and Methods for Micro- and Nanoanalysis (joint session KFM/CPP)

CPP 10.3: Vortrag

Montag, 27. März 2023, 15:10–15:30, POT 106

Accessible electron microscopy: Adding an EELS workflow to the ChemiTEM project — •Daniela Ramermann, Julia Menten, Elisabeth H. Wolf, and Walid Hetaba — Max-Planck-Institut für Chemische Energiekonversion, Mülheim an der Ruhr

Transmission electron microscopy is a versatile tool for the investigation of micro- and nanostructures as well as chemical and electronic properties. However, TEM experts are needed to perform the majority of analytic measurements, which represents a bottleneck in the throughput of research. To broaden access to TEM investigations for every scientist, the ChemiTEM project[1] has developed workflows for the most used techniques (HRTEM, STEM, EDX). These are implemented in an app and guide the user through every step after only a basic training.

Now a workflow for EELS measurements has been added: For the three most used measurement scenarios, assessing sample thickness, elemental mapping and oxidation state determination, a decision-tree based workflow has been created. A prerequisite is the STEM alignment from the ChemiTEM app. A set of questions about the sample evaluates if EELS measurements using the workflow are possible or a TEM expert is needed. Step-by-step instructions guarantee a standardised measurement and data quality. The workflow can be easily adapted to other microscopes and makes EELS based techniques available to a broader community.

[1] Hetaba et al., Chemistry-Methods, 1, 401-407, https://doi.org/10.1002/cmtd.202100001