dc.contributor.author
Richter, Nina F.
dc.contributor.author
Risse, Thomas
dc.date.accessioned
2022-04-21T11:43:56Z
dc.date.available
2022-04-21T11:43:56Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/34757
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-34476
dc.description.abstract
Paramagnetic defects of thin CaO(001) films grown on Mo(001) are characterized using electron paramagnetic resonance (EPR) spectroscopy under ultrahigh vacuum conditions. A variety of paramagnetic centers located in the volume of the films are identified whose speciation as well as relative abundance was found to depend on the growth rate of the films. Pristine films prepared at a lower growth rate exhibited a larger number and a different speciation of paramagnetic defects than films grown at a higher rate. Annealing of the films to 1030 K, which improves their long-range order, results in quenching of most of the paramagnetic species observed for the pristine film; however, films prepared at a lower growth rate exhibit new paramagnetic signals upon annealing, which are absent in films prepared at a higher growth rate. The signals can be assigned to paramagnetic Mo ions previously shown to diffuse into these films. These results indicate that the amount and speciation of the transition metal ions depend on the preparation conditions which in turn can also affect the surface chemistry of these systems.
en
dc.format.extent
7 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc/4.0/
dc.subject
Paramagnetic defects
en
dc.subject
EPR spectroscopy
en
dc.subject
ultrahigh vacuum conditions
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
dc.title
Defects of thin CaO(001) on Mo(001): an EPR spectroscopic perspective
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1039/D2CP00389A
dcterms.bibliographicCitation.journaltitle
Physical Chemistry Chemical Physics
dcterms.bibliographicCitation.number
13
dcterms.bibliographicCitation.pagestart
7732
dcterms.bibliographicCitation.pageend
7738
dcterms.bibliographicCitation.volume
24
dcterms.bibliographicCitation.url
https://doi.org/10.1039/D2CP00389A
refubium.affiliation
Biologie, Chemie, Pharmazie
refubium.affiliation.other
Institut für Chemie und Biochemie
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1463-9084
refubium.resourceType.provider
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