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AuthorGeiger, Danieldc.contributor.author
Date of accession2018-07-09T10:05:23Zdc.date.accessioned
Available in OPARU since2018-07-09T10:05:23Zdc.date.available
Year of creation2018dc.date.created
Date of first publication2018-07-09dc.date.issued
AbstractThe aim of this thesis is to achieve a better understanding of the interactions of nano particles with surfaces and to elucidate the underlying mechanisms, due to the importance for many technical applications. For that reason, we developed a model system using 50 nm silica particles deposited on silicon and sapphire substrates. We used atomic force microscopy based lateral force measurements to characterize the adhesion strength of these nano particles on both supports. We studied the temporal evolution of the adhesion strength under different storage conditions like nitrogen, humid nitrogen and ambient air. We found that humidity strengthens considerably the adhesion of the particles on the time scale of only a few days, while dry nitrogen and vacuum inhibit adhesion aging. Furthermore, the increase in adhesion force was found to be accompanied by a plateau growing below the particles. This finding can be explained by the Deal-Grove model for diffusion driven oxidation. Based on a chain of evidence and literature we present a possible explanation for the aging behavior of the nano particles. Furthermore, we supplemented the lateral force measurements by a probability theory based data analysis procedure that is suitable to reduce measurement geometry based artifacts. Within this theoretical framework, we achieve a better accuracy and precision for this type of experiments compared to standard data analysis procedures.dc.description.abstract
Languageendc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandarddc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v3dc.rights.uri
KeywordNano particle adhesiondc.subject
KeywordLateral force microscopydc.subject
KeywordAdhesion agingdc.subject
KeywordSurface sciencedc.subject
KeywordStatistical analysisdc.subject
Dewey Decimal GroupDDC 530 / Physicsdc.subject.ddc
LCSHContact angledc.subject.lcsh
LCSHAtomic force microscopydc.subject.lcsh
LCSHNanoparticlesdc.subject.lcsh
LCSHSurfaces (Physics)dc.subject.lcsh
LCSHStatisticsdc.subject.lcsh
TitleParticles on surfaces: development and application of Atomic Force Microscopy methods to study time dependent adhesion of nano particlesdc.title
Resource typeDissertationdc.type
Date of acceptance2018-06-13dcterms.dateAccepted
RefereeMarti, Othmardc.contributor.referee
RefereeKoslowski, Berndtdc.contributor.referee
DOIhttp://dx.doi.org/10.18725/OPARU-7942dc.identifier.doi
PPN1027323766dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-oparu-7999-2dc.identifier.urn
GNDNanopartikeldc.subject.gnd
GNDRandwinkeldc.subject.gnd
GNDAdhäsiondc.subject.gnd
GNDFestkörperoberflächedc.subject.gnd
GNDRasterkraftmikroskopiedc.subject.gnd
FacultyFakultät für Naturwissenschaftenuulm.affiliationGeneral
InstitutionInstitut für Experimentelle Physikuulm.affiliationSpecific
InstitutionInstitut für Festkörperphysikuulm.affiliationSpecific
Grantor of degreeFakultät für Naturwissenschaftenuulm.thesisGrantor
DCMI TypeTextuulm.typeDCMI
CategoryPublikationenuulm.category
Bibliographyuulmuulm.bibliographie


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