Channeling effects in gold nanoclusters under He ion irradiation

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorGhaderzadeh, Sadeghen_US
dc.contributor.authorGhorbani-Asl, Mahdien_US
dc.contributor.authorKretschmer, Silvanen_US
dc.contributor.authorHlawacek, Gregoren_US
dc.contributor.authorKrasheninnikov, Arkady V.en_US
dc.contributor.departmentHelmholtz-Zentrum Dresden-Rossendorf EVen_US
dc.contributor.departmentDepartment of Applied Physicsen_US
dc.date.accessioned2020-01-17T13:26:06Z
dc.date.available2020-01-17T13:26:06Z
dc.date.issued2020-01-17en_US
dc.description| openaire: EC/H2020/720964/EU//npSCOPE
dc.description.abstractThe 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.description.versionPeer revieweden
dc.format.extent11
dc.format.extent1-11
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationGhaderzadeh , 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/ab4847en
dc.identifier.doi10.1088/1361-6528/ab4847en_US
dc.identifier.issn0957-4484
dc.identifier.issn1361-6528
dc.identifier.otherPURE UUID: 1b68b108-cebe-4b38-8b25-e176b2aee17fen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/1b68b108-cebe-4b38-8b25-e176b2aee17fen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85073648692&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/40199249/Ghaderzadeh_2020_Nanotechnology_31_035302.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/42488
dc.identifier.urnURN:NBN:fi:aalto-202001171603
dc.language.isoenen
dc.publisherIOP PUBLISHING LTD
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/720964/EU//npSCOPEen_US
dc.relation.ispartofseriesNanotechnologyen
dc.relation.ispartofseriesVolume 31, issue 3en
dc.rightsopenAccessen
dc.subject.keywordChannelingen_US
dc.subject.keywordGold nanostructuresen_US
dc.subject.keywordHelium ion microscopeen_US
dc.subject.keywordIon irradiationen_US
dc.subject.keywordSputtering-yielden_US
dc.titleChanneling effects in gold nanoclusters under He ion irradiationen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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