Charge-induced formation of linear Au clusters on thin MgO films:Scanning tunneling microscopy and density-functional theory study
| Autor: | Gianfranco Pacchioni, Niklas Nilius, Hans-Peter Rust, Violeta Simic-Milosevic, Xiao Lin, Thomas Risse, Hans-Joachim Freund, Thomas König, Markus Heyde, Livia Giordano, Martin Sterrer |
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| Přispěvatelé: | Simic Milosevic, V, Heyde, M, Lin, X, König, T, Rust, H, Sterrer, M, Risse, T, Nilius, N, Freund, H, Giordano, L, Pacchioni, G |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Nanotechnology Charge (physics) Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Electron transfer law Condensed Matter::Superconductivity oxide materials DFT Atom Physics::Atomic and Molecular Clusters Cluster (physics) Density functional theory Thin film Scanning tunneling microscope Deposition (law) |
| Zdroj: | Physical Review B |
| Popis: | Gold deposition onto ultrathin MgO films on Ag(001) results in the formation of linear Au clusters, as revealed from a combined scanning tunneling microscopy and density-functional theory study. The equilibrium structure of small Au clusters containing three to seven atoms is therefore different on thin film and bulk MgO(001) but also deviates from the shape of the respective gas-phase clusters. The peculiar one-dimensional growth regime of gold is stimulated by an electron transfer from the MgO/Ag interface to the deposited Au clusters, resulting in singly and doubly charged cluster anions. Only for larger atom numbers, the formation of compact two-dimensional clusters prevails on the MgO thin films. |
| Databáze: | OpenAIRE |
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