<div class="csl-bib-body">
<div class="csl-entry">Niggas, A. (2024, January 31). <i>Nanoscale Shaping of Surfaces Using Slow Highly Charged Ions</i> [Presentation]. AP-Seminare 2023, Darmstadt-Wixhausen, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/193683
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dc.description.abstract
Upon impact on a surface, slow, highly charged ions can deposit several tens of keV within the very first layers of a material. This energy may trigger the emission of secondary particles (electrons, x-rays, sputtered target atoms) but can also lead to a permanent modification of the surface, e.g., craters or hillocks for bulk samples or pores in 2D materials. The susceptibility for highly charged ion-induced nano-structuring depends strongly on the material’s electronic response to strong electronic excitations and consequential electronic and structural relaxation processes, as well as the kinetic and potential energy of the projectile. Most studies, so far, focused on the modification of insulating or semiconducting surfaces, like CaF2 crystals, where thresholds regarding the ion potential energy were found: etch-pits and hillocks could only be observed on the surfaces when the potential energy exceeds a threshold value [1]. A similar behaviour was also discussed for free-standing MoS2 monolayers [2].
For metals, however, data regarding charge-state-dependent nanostructure formation is scarce, which is often explained by high charge carrier mobilities dissipating the deposited energy before atom displacement occurs. We could recently show that by reducing the sample size, i.e., going from a gold bulk sample to gold nano-islands, and thereby confining the potential energy within a small region, even the metal becomes susceptible to modification by highly charged ions [3].
Current experiments are limited by available ion charge states at low energies from lab-based ion sources. Here, HITRAP will allow us to explore so far uncharted territory at potential energies up to almost 1 MeV for fully stripped U ions to study the material under extreme conditions.
en
dc.language.iso
en
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dc.subject
ion surface collisions
en
dc.subject
highly charged ions
en
dc.title
Nanoscale Shaping of Surfaces Using Slow Highly Charged Ions
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Presentation
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tuw.researchTopic.id
M1
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.value
100
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tuw.linking
https://indico.gsi.de/event/18441/
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tuw.publication.orgunit
E134-03 - Forschungsbereich Atomic and Plasma Physics
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tuw.author.orcid
0000-0002-5838-5789
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tuw.event.name
AP-Seminare 2023
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tuw.event.startdate
31-01-2024
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tuw.event.enddate
31-01-2024
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Darmstadt-Wixhausen
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tuw.event.country
DE
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tuw.event.institution
GSI Helmholtzzentrum für Schwerionenforschung
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tuw.event.presenter
Niggas, Anna
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.languageiso639-1
en
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item.openairetype
conference presentation
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/R60J-J5BD
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crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics
