Ultrathin oxide films: Epitaxy at the two-dimensional limit
| Autor: | Svetlozar Surnev, Nassar Doudin, David Kuhness, Thomas Obermüller, Falko P. Netzer |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Oxide 02 engineering and technology engineering.material 010402 general chemistry Epitaxy 01 natural sciences Metal chemistry.chemical_compound Monolayer Limit (music) General Materials Science Nanoscopic scale Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Mechanics of Materials Chemical physics visual_art engineering visual_art.visual_art_medium Noble metal 0210 nano-technology Ternary operation |
| Zdroj: | Journal of Materials Research. 32:3924-3935 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2017.391 |
| Popis: | The epitaxial growth of two-dimensional oxide layers on metal surfaces is examined in view of the 1949 van der Merwe proposition that epitaxy requires a pseudomorphic monolayer. It is argued that this limitation is relaxed in the 2-D case and that ordered oxide phases can grow out of a variety of interface scenarios, ranging from pseudomorphic to incommensurate. Prototypical examples of binary and ternary oxides supported on noble metal surfaces are presented, and the structural peculiarities of 2-D oxide phases are emphasized. The usually strong coupling at the oxide-metal interface leads to the stabilization of novel structure concepts that are not encountered in the, respective, bulk phases. The structural flexibility of 2-D lattices is discussed, and their ability to accommodate strain in generating novel 2-D oxide phases is emphasized. In the case of weakly coupled systems, it is reported that more subtle interactions at the interface can create periodic nanoscale morphologies and particular growth patterns in subsequent layers. |
| Databáze: | OpenAIRE |
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