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Description:

Probing the stereodynamics of a gas–surface interaction is a useful tool to investigate the mechanisms responsible for adsorption. Experimental results are provided on the adsorption of alignment-controlled O2 interacting with a Cu(111) surface for the first time, across a range of incident energies (65–550 meV) and angles of incidence (0–601). Molecules of O2 in a supersonic beam are prepared in a single spin rotational state, and aligned with a Cu(111) surface so that the rotational angular momentum of O2 is either parallel or perpendicular to the surface. A strong steric effect is observed, where the initial sticking probability is higher in the case of a ’side-on’ collision, with measurable adsorption appearing at normal incident energies of 100 meV. The onset of sticking occurs at incident energies of approximately 200 meV in the case of an ’end-on’ collision. The results also indicate that the adsorption of O2 on Cu(111) is predominantly due to an activated process in the energy range probed, corroborating previous experimental and theoretical results.

Rights:

• https://creativecommons.org/licenses/by-nc/3.0/legalcode
  

Keyword: O2, Copper, Adsorption, Steric effect

Date published: 2025-02-12

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Physical Chemistry Chemical Physics (ISSN: 14639076) vol. 27 issue. 11 p. 5701-5709

Funding:

• Leverhulme Trust PLP-2022-21
• HORIZON EUROPE Excellent Science 948373
• Japan Society for the Promotion of Science 20H02623
• Japan Society for the Promotion of Science 24K01349
• Leverhulme Trust PG-2022- 264

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1039/d4cp04595e

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Updated at: 2025-03-26 17:25:39 +0900

Published on MDR: 2025-03-26 17:25:42 +0900