Can the environmental TEM confirm atomistic models of adsorbed molecules at surfaces of solids?

Abstract : It is well established that enhanced atomic mobility exists at ceria (CeO 2) surfaces in high vacuum (HV) conditions within the TEM, owing to beam-induced reduction effects. Controlling the atmosphere surrounding the specimen within an aberration-corrected environmental TEM (ETEM) allows to monitor the atomic mobility at {100} surfaces, and to directly visualize the projected atomic structure of the top surface of ceria nanocubes through high resolution TEM (HRTEM) imaging [1]. Therefore, it is pertinent to investigate the current capabilities of the ETEM to validate atomistic models of adsorbed molecules at the surface of materials. However, it is only possible to conclude about the nature of the contrasts at the surface by comparing the experimental HRTEM images to image simulations.
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Submitted on : Friday, November 8, 2019 - 4:48:54 PM
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Matthieu Bugnet, Ihor Pershukov, Olivier Matz, Monica Calatayud, Thierry Epicier. Can the environmental TEM confirm atomistic models of adsorbed molecules at surfaces of solids?. M&M 2019, Aug 2019, Portland, United States. pp.1440-1441, ⟨10.1017/S1431927619007931⟩. ⟨hal-02351353⟩

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