Distinguishing the core from the shell in MnOx/MnOy and FeOx/MnOx core/shell nanoparticles through quantitative electron energy loss spectroscopy (EELS) analysis
The structural and chemical characterization of inverted bi-magnetic MnO x(antiferromagnetic)/MnO y(ferrimagnetic) and FeO x(soft-ferrimagnetic)/MnO x(hard-ferrimagnetic) core/shell nanoparticles has been carried out by means of scanning transmission electron microscopy with electron energy loss spe...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/154893 |
| Acceso en línea: | https://hdl.handle.net/2445/154893 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanopartícules Espectroscòpia de pèrdua d'energia d'electrons Nanoparticles Electron energy loss spectroscopy |
| Sumario: | The structural and chemical characterization of inverted bi-magnetic MnO x(antiferromagnetic)/MnO y(ferrimagnetic) and FeO x(soft-ferrimagnetic)/MnO x(hard-ferrimagnetic) core/shell nanoparticles has been carried out by means of scanning transmission electron microscopy with electron energy loss spectroscopy analysis, (S)TEM-EELS. Quantitative EELS was applied to assess the local composition of the nanoparticles by evaluating the local Mn oxidation state based on the Mn L 3/L 2 peak intensity ratio and the Mn L 3 peak onset. The analysis allows to unambiguously distinguish the core from the shell and to determine the nature of the involved manganese oxides in both cases. The results evidence that the structure of the nanoparticles is, in fact, more complex than the one designed by the synthesis parameters. |
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