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Channeling effects in gold nanoclusters under He ion irradiation

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Ghaderzadeh, Sadegh
dc.contributor.author Ghorbani-Asl, Mahdi
dc.contributor.author Kretschmer, Silvan
dc.contributor.author Hlawacek, Gregor
dc.contributor.author Krasheninnikov, Arkady V.
dc.date.accessioned 2020-01-17T13:26:06Z
dc.date.available 2020-01-17T13:26:06Z
dc.date.issued 2020-01-17
dc.identifier.citation Ghaderzadeh , S , Ghorbani-Asl , M , Kretschmer , S , Hlawacek , G & Krasheninnikov , A V 2020 , ' Channeling effects in gold nanoclusters under He ion irradiation : Insights from molecular dynamics simulations ' , Nanotechnology , vol. 31 , no. 3 , 035302 , pp. 1-11 . https://doi.org/10.1088/1361-6528/ab4847 en
dc.identifier.issn 0957-4484
dc.identifier.issn 1361-6528
dc.identifier.other PURE UUID: 1b68b108-cebe-4b38-8b25-e176b2aee17f
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/1b68b108-cebe-4b38-8b25-e176b2aee17f
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85073648692&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/40199249/Ghaderzadeh_2020_Nanotechnology_31_035302.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/42488
dc.description | openaire: EC/H2020/720964/EU//npSCOPE
dc.description.abstract The interpretation of helium ion microscopy (HIM) images of crystalline metal clusters requires microscopic understanding of the effects of He ion irradiation on the system, including energy deposition and associated heating, as well as channeling patterns. While channeling in bulk metals has been studied at length, there is no quantitative data for small clusters. We carry out molecular dynamics simulations to investigate the behavior of gold nanoparticles with diameters of 5-15 nm under 30 keV He ion irradiation. We show that impacts of the ions can give rise to substantial heating of the clusters through deposition of energy into electronic degrees of freedom, but it does not affect channeling, as clusters cool down between consecutive impact of the ions under typical imaging conditions. At the same time, high temperatures and small cluster sizes should give rise to fast annealing of defects so that the system remains crystalline. Our results show that ion-channeling occurs not only in the principal low-index, but also in the intermediate directions. The strengths of different channels are specified, and their correlations with sputtering-yield and damage production is discussed, along with size-dependence of these properties. The effects of planar defects, such as stacking faults on channeling were also investigated. Finally, we discuss the implications of our results for the analysis of HIM images of metal clusters. en
dc.format.extent 11
dc.format.extent 1-11
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation info:eu-repo/grantAgreement/EC/H2020/720964/EU//npSCOPE
dc.relation.ispartofseries Nanotechnology en
dc.relation.ispartofseries Volume 31, issue 3 en
dc.rights openAccess en
dc.title Channeling effects in gold nanoclusters under He ion irradiation en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Helmholtz-Zentrum Dresden-Rossendorf
dc.contributor.department Department of Applied Physics
dc.subject.keyword Channeling
dc.subject.keyword Gold nanostructures
dc.subject.keyword Helium ion microscope
dc.subject.keyword Ion irradiation
dc.subject.keyword Sputtering-yield
dc.identifier.urn URN:NBN:fi:aalto-202001171603
dc.identifier.doi 10.1088/1361-6528/ab4847
dc.type.version publishedVersion

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