uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Alloying and oxidation of in situ produced core-shell Al@Yb nanoalloy particles-An "on-the-fly" study
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
Show others and affiliations
2014 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 141, no 8, 084302- p.Article in journal (Refereed) Published
Abstract [en]

Core-shell-structured nanoalloy particles with an Al-dominated interior covered by few Yb mono-layers have been fabricated using a vapor-aggregation method involving magnetron sputtering. The radially segregated structure of the Yb-Al nanoparticles has been disclosed by "on-the-fly" photoelectron spectroscopy monitoring of the nanoparticle beam in Yb 4f and Al 2p electron binding energy regions. Both, the binding energy values and the electron microscopy images taken on the deposited nanoparticles, allow estimating their dimensions to be in the 5-10 nm range. The photoelectron spectroscopy results suggest that in these nanoparticles no trivalent Yb - the typical case for the macroscopic Yb-Al alloy - is present. The oxidation of preformed Yb-Al nanoparticles was successfully attempted, leading to the appearance of divalent Yb surface oxide - in contrast to the bulk macroscopic Yb which is trivalent in the oxide. Our results suggest that at intermediate oxygen exposures "sandwich-like" nanoparticles of YbO/Yb/Al were synthesized. At higher O-2 exposures, the oxygen seems to penetrate all the way to the Yb-Al interface. The results of the present study have to be considered when photonic applications of Yb-doped garnet nanoparticles are planned.  

Place, publisher, year, edition, pages
2014. Vol. 141, no 8, 084302- p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:uu:diva-235189DOI: 10.1063/1.4893115ISI: 000341987600015PubMedID: 25173009OAI: oai:DiVA.org:uu-235189DiVA: diva2:759457
Available from: 2014-10-30 Created: 2014-10-29 Last updated: 2014-10-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Björneholm, Olle
By organisation
Department of Physics and AstronomyMolecular and condensed matter physics
In the same journal
Journal of Chemical Physics
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 268 hits
ReferencesLink to record
Permanent link

Direct link