<div class="csl-bib-body">
<div class="csl-entry">Schwestka, J. (2016). <i>Coincidence measurements of ion-induced electron emission from graphene</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2016.28549</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2016.28549
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/6031
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dc.description
Zusammenfassung in deutscher Sprache
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dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
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dc.description.abstract
With its unique properties, single layer graphene (SLG) has been considered as an outstanding candidate for many possible future applications in nano-electronics as well as in ultrafiltration. This has triggered considerable interest in the investigation of its electronic structure, and possibilities to modify this structure, e.g. by ion impact, have been investigated. In this connection collision studies with ions and the result- ing electron emission can help to improve the understanding of interaction processes between charged projectiles and this ultimately thin 2D material. In this thesis ion-induced electron emission from freestanding SLG is investigated. A new experimental setup for detecting emitted electrons in coincidence with ions traversing through the graphene has been built. Thin carbon foils, single layer graphene and its Quantifoil support have been bombarded with slow multiply charged Arq+ ions (2 -q- 9) with impact energies - 54 keV to determine the number statistics of emit- ted electrons. An evaluation routine is implemented enabling a routine calculation of the total emission yield. For obtaining the emission statistics non-negligible electron backscattering from the detector surface and various background contributions are taken into account. To gain access to contributions by kinetic and potential electron emission, measurements with varying projectile velocities and charge states are performed. A linear dependence of the electron emission yield on the ion impact velocity is found for graphene and amorphous carbon. The obtained data are compared with emission yields from highly ordered pyrolytic graphite (HOPG). The dependence on the ion charge state is observed by bombarding the examined targets with argon ions at a fixed impact energy. As expected a strong dependence on the projectile charge state is shown for all these carbon-based materials pointing to a dominant potential emission process. For bombardment with multiply charged ions SLG is found to have a higher electron emission yield compared to amorphous carbon. Within the scope of this thesis the Quantifoil support, on which the graphene is mounted, was found to be not sufficiently thick to stop Ar projectiles at these impact energies. Coincidence measurements of ion-induced electron emission are therefore not able to separate electrons originating from SLG and those from SLG on Quantifoil support. A possible solution for this problem is suggested in the Outlook of this work.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Hochgeladene Ionen
de
dc.subject
Graphen
de
dc.subject
Elektronenemission
de
dc.subject
highly chared ions
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dc.subject
graphene
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dc.subject
electron emission
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dc.title
Coincidence measurements of ion-induced electron emission from graphene
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dc.title.alternative
Koinzidenzmessungen zur Ionen-induzierten Elektronenemission aus Graphene
de
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2016.28549
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Janine Schwestka
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dc.publisher.place
Wien
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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tuw.publication.orgunit
E134 - Institut für Angewandte Physik
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dc.type.qualificationlevel
Diploma
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dc.identifier.libraryid
AC13073757
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dc.description.numberOfPages
80
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dc.identifier.urn
urn:nbn:at:at-ubtuw:1-1125
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dc.thesistype
Diplomarbeit
de
dc.thesistype
Diploma Thesis
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tuw.author.orcid
0000-0002-7799-6606
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dc.rights.identifier
In Copyright
en
dc.rights.identifier
Urheberrechtsschutz
de
tuw.advisor.staffStatus
staff
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tuw.advisor.orcid
0000-0002-9788-0934
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item.fulltext
with Fulltext
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item.cerifentitytype
Publications
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item.mimetype
application/pdf
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item.openairecristype
http://purl.org/coar/resource_type/c_bdcc
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item.languageiso639-1
en
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item.openaccessfulltext
Open Access
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item.openairetype
master thesis
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item.grantfulltext
open
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crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics