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

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Core-shell structure in self-assembled lead/lead-oxide nanoclusters revealed by photoelectron spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. (UBjL)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. (UBjL)ORCID iD: 0000-0002-2978-1870
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Show others and affiliations
2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 87, no 3, 035402- p.Article in journal (Refereed) Published
Abstract [en]

Nanoclusters containing metallic lead and lead oxide have been produced by self-assembly out of a primary mixture of lead atoms and oxygen in a reactive sputtering-based cluster source. Comparison of the valence and core-level responses in the photoelectron spectra shows that clusters have a core-shell structure with a lead-oxide core coated by an outer shell of metallic lead. This core-shell order is opposite to that typical for most microscopic and macroscopic materials. We explain this by the peculiarities of the cluster production kinetics and by the system's energy minimization striving due to what lead oxide is placed in the core of the mixed cluster.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2013. Vol. 87, no 3, 035402- p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-193490DOI: 10.1103/PhysRevB.87.035402ISI: 000312999300005OAI: oai:DiVA.org:uu-193490DiVA: diva2:603259
Funder
TrenOp, Transport Research Environment with Novel PerspectivesEU, European Research Council
Available from: 2013-02-05 Created: 2013-02-04 Last updated: 2017-12-06
In thesis
1. Multicomponent Clusters/Nanoparticles: An Investigation of Electronic and Geometric Properties by Photoelectron Spectroscopy
Open this publication in new window or tab >>Multicomponent Clusters/Nanoparticles: An Investigation of Electronic and Geometric Properties by Photoelectron Spectroscopy
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Clusters/nanoparticles are aggregates of a “small” number of building blocks, atoms or molecules, ranging from two up to millions of atoms. Two main groups of clusters have been studied using photoelectron spectroscopy based on synchrotron radiation. They are dry/wet alkali-halide clusters, including pure water clusters, and metal-based nanoparticles.

For the dry alkali halide clusters, analysis of the data and theoretical modeling has allowed us insights into the local electronic properties at nanoscale: a change of polarizability of ions in the alkali-halide clusters due to the varying environment has been suggested. The study of the wet salt clusters shows that the alkali-halides are already solvated at the nanoscale reached by water clusters doped with salt vapor.

The photoelectron angular distribution of water cluster shows lower anisotropy parameters as compared to the separate monomers. A model based on intracluster scattering has been built to partly explain the reduction.

In the last part of the thesis, metal-based multi-component nanoparticles have been produced by self-assembly processes using reactive magnetron sputtering. Depending on the specific metal element, oxidation processes have been applied before or after the aggregation. Clearly radial distributions such as core-shell and “sandwich-like” structures have unambiguously determined by photoelectron spectroscopy.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2013. 92 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1065
Keyword
Clusters, Nanoparticles, Alloy, Atmospheric chemistry, Alkali halide, Transition metals, X-ray Photoelectron spectroscopy, Polarizability, Core-shell, Sandwich structure, MAX-lab, BESSY II
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:uu:diva-205651 (URN)978-91-554-8730-0 (ISBN)
Public defence
2013-10-03, Room 80101, Lägerhyddsvägen 1, Uppsala, 10:00 (English)
Opponent
Supervisors
Available from: 2013-09-12 Created: 2013-08-21 Last updated: 2014-01-22

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Zhang, ChaofanAndersson, TomasSvensson, SvanteBjörneholm, Olle

Search in DiVA

By author/editor
Zhang, ChaofanAndersson, TomasSvensson, SvanteBjörneholm, Olle
By organisation
Molecular and condensed matter physics
In the same journal
Physical Review B. Condensed Matter and Materials Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 621 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf