CeOx Elastic Properties: An In Situ Nanocompression Study in Environmental Transmission Electron Microscopy (ETEM)

The ability to have predictive behavior of nanoparticles during bottom-up fabrication requires a fundamental understanding of their mechanical properties, often differing from their bulk counterparts because of the dramatic difference in grain size and free surfaces. Here, a series of in situ nanoco...

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Bibliographic Details
Published inJOM (1989) Vol. 76; no. 5; pp. 2326 - 2335
Main Authors Joly-Pottuz, Lucile, Zhang, Rongrong, Albaret, Tristan, Epicier, Thierry, Jenei, Istvan, Cobian, Manuel, Stauffer, Douglas, Masenelli-Varlot, Karine
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2024
Springer Nature B.V
Springer Verlag (Germany)
Subjects
Catalysis
Cerium oxides
Chemical Sciences
Chemistry/Food Science
Earth Sciences
Elastic properties
Electron microscopy
Electrons
Engineering
Environment
Environment and Society
Environmental Sciences
EUROMAT23: Micro- and Nano-mechanics—Characterization and Modelling
Experiments
Free surfaces
Geometry
Grain size
Mechanical properties
Nanoparticles
Oxidation
Physics
Simulation
Stress concentration
Transmission electron microscopy
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Summary:The ability to have predictive behavior of nanoparticles during bottom-up fabrication requires a fundamental understanding of their mechanical properties, often differing from their bulk counterparts because of the dramatic difference in grain size and free surfaces. Here, a series of in situ nanocompression experiments is performed on cerium oxide nanocubes in an environmental transmission electron microscope, in which the operating conditions of electron dose and gaseous environment are changed. This leads to either oxidation or reduction of the nanoparticles in situ. Utilizing the same nanoparticle under different oxidative states allows a direct comparison of the mechanical property changes. The elastic properties of CeO x nanocubes, 1.5 < x < 2 , are compared to the results from a DFT + U simulation. The trends from the two treatments are in general agreement.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-024-06397-6