Sub-Kelvin thermometry for evaluating the local temperature stability within in situ TEM gas cells

Fritsch B, Wu M, Hutzler A, Zhou D, Spruit R, Vogl L, Will J, Pérez Garza H, März M, Jank M, Spiecker E (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Ultramicroscopy Elsevier

Book Volume: 235

Pages Range: 113494

Article Number: 113494

URI: https://doi.org/10.1088/1361-6528/ab8a8c

DOI: 10.1016/j.ultramic.2022.113494

Open Access Link: https://doi.org/10.1016/j.ultramic.2022.113494

Abstract

In situ TEM utilizing windowed gas cells is a promising technique for studying catalytic processes, wherein temperature is one of the most important parameters to be controlled. Current gas cells are only capable of temperature measurement on a global (mm) scale, although the local temperature at the spot of observation (µm to nm scale) may significantly differ. Thus, local temperature fluctuations caused by gas flow and heat dissipation dynamics remain undetected when solely relying on the global device feedback. In this study, we overcome this limitation by measuring the specimen temperature in situ utilizing parallel-beam electron diffraction at gold nanoparticles. By combining this technique with an advanced data processing algorithm, we achieve sub-Kelvin precision in both, vacuum as well as gaseous environments. Mitigating charging effects is furthermore shown to minimize systematic errors. By utilizing this method, we characterize the local thermal stability of a state-of-the-art gas cell equipped with heating capability in vacuum and under various gas-flow conditions. Our findings provide crucial reference for in situ investigations into catalysis.

Authors with CRIS profile

Birk Fritsch Lehrstuhl für Leistungselektronik (LEE) Mingjian Wu Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Andreas Hutzler Lehrstuhl für Elektronische Bauelemente Lilian Vogl Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Johannes Will Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Martin März Lehrstuhl für Leistungselektronik (LEE) Michael Jank Lehrstuhl für Elektronische Bauelemente Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Related research project(s)

In-situ Characterization of Nanomaterials with Electrons, X-rays/Neutrons and Scanning Probes (GRK 1896) Oct. 1, 2013 - Sept. 30, 2022

Involved external institutions

DENSsolutions B.V. NL Netherlands (NL)

How to cite

APA:

Fritsch, B., Wu, M., Hutzler, A., Zhou, D., Spruit, R., Vogl, L.,... Spiecker, E. (2022). Sub-Kelvin thermometry for evaluating the local temperature stability within in situ TEM gas cells. Ultramicroscopy, 235, 113494. https://doi.org/10.1016/j.ultramic.2022.113494

MLA:

Fritsch, Birk, et al. "Sub-Kelvin thermometry for evaluating the local temperature stability within in situ TEM gas cells." Ultramicroscopy 235 (2022): 113494.

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