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The adsorption of helium atoms on small cationic gold clusters
Stockholm University, Faculty of Science, Department of Physics. Universit├Ąt Innsbruck, Austria .ORCID iD: 0000-0003-1028-7976
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Number of Authors: 102018 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 20, no 14, p. 9554-9560Article in journal (Refereed) Published
Abstract [en]

Adducts formed between small gold cluster cations and helium atoms are reported for the first time. These binary ions, Aun+Hem, were produced by electron ionization of helium nanodroplets doped with neutral gold clusters and were detected using mass spectrometry. For a given value of n, the distribution of ions as a function of the number of added helium atoms, m, has been recorded. Peaks with anomalously high intensities, corresponding to so-called magic number ions, are identified and interpreted in terms of the geometric structures of the underlying Au-n(+) ions. These features can be accounted for by planar structures for Au-n(+) ions with n <= 7, with the addition of helium having no significant effect on the structures of the underlying gold cluster ions. According to ion mobility studies and some theoretical predictions, a 3-D structure is expected for Au-8(+). However, the findings for Au-8(+) in this work are more consistent with a planar structure.

Place, publisher, year, edition, pages
2018. Vol. 20, no 14, p. 9554-9560
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Chemical Sciences Physical Sciences
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URN: urn:nbn:se:su:diva-155903DOI: 10.1039/c8cp01273cISI: 000429205700054PubMedID: 29577136OAI: oai:DiVA.org:su-155903DiVA, id: diva2:1202774
Available from: 2018-04-30 Created: 2018-04-30 Last updated: 2018-04-30Bibliographically approved

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