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Article Dans Une Revue Journal of Applied Crystallography Année : 2009

Diffraction anomalous fine structure study of iron/iron oxide nanoparticles

F. Boscherini
  • Fonction : Auteur
L. Pasquini

Résumé

Diffraction anomalous fine structure is a recently developed technique which can provide a measurement of the local structure of a given element in a particular phase or crystallographic site. Most previous investigations have applied the technique to bulk solids, thin films, and nano-dots or wires on crystalline substrates. In this paper, the technique is applied to highly disordered nanometre-sized Fe/Fe oxide core-shell nanocrystalline powders, the diffraction patterns of which exhibit weak and greatly broadened diffraction peaks. Focusing on the oxide shell diffraction peaks, a qualitative analysis of the near-edge spectral region and a quantitative analysis of the extended energy region are provided; in particular, good quality fittings of the extended range spectra are obtained. The local structure is selectively probed around the tetrahedral and octahedral sites of the oxide shell, finding the presence of a high degree of structural disorder. This study demonstrates that diffraction anomalous fine structure can now be fruitfully applied to nanocrystalline powders.

Domaines

Matériaux

Dates et versions

hal-01067037 , version 1 (22-09-2014)

Identifiants

Citer

C. Meneghini, F. Boscherini, L. Pasquini, Hubert Renevier. Diffraction anomalous fine structure study of iron/iron oxide nanoparticles. Journal of Applied Crystallography, 2009, 42, pp.642-648. ⟨10.1107/s002188980902353x⟩. ⟨hal-01067037⟩

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