Skip to main content

An X-ray absorption spectroscopy study of the inversion degree in zinc ferrite nanocrystals dispersed on a highly porous silica aerogel matrix

Carta, D., Marras, C., Loche, D., Mountjoy, G., Ahmed, S.I., Corrias, A. (2013) An X-ray absorption spectroscopy study of the inversion degree in zinc ferrite nanocrystals dispersed on a highly porous silica aerogel matrix. Journal of Chemical Physics, 138 (5). 054702-054702. ISSN 0021-9606. (doi:10.1063/1.4789479) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1063/1.4789479

Abstract

The structural properties of zinc ferrite nanoparticles with spinel structure dispersed in a highly porous SiO2 aerogel matrix were compared with a bulk zinc ferrite sample. In particular, the details of the cation distribution between the octahedral (B) and tetrahedral (A) sites of the spinel structure were determined using X-ray absorption spectroscopy. The analysis of both the X-ray absorption near edge structure and the extended X-ray absorption fine structure indicates that the degree of inversion of the zinc ferrite spinel structures varies with particle size. In particular, in the bulk microcrystalline sample, Zn2+ ions are at the tetrahedral sites and trivalent Fe3+ ions occupy octahedral sites (normal spinel). When particle size decreases, Zn2+ ions are transferred to octahedral sites and the degree of inversion is found to increase as the nanoparticle size decreases. This is the first time that a variation of the degree of inversion with particle size is observed in ferrite nanoparticles grown within an aerogel matrix. © 2013 American Institute of Physics.

Item Type: Article
DOI/Identification number: 10.1063/1.4789479
Uncontrolled keywords: Cation distributions, Extended X-ray absorption fine structures, Ferrite nanoparticles, Highly porous silica, Inversion degree, Microcrystalline samples, Nanoparticle sizes, Normal spinel, Octahedral sites, Porous SiO, Spinel structure, Tetrahedral sites, X-ray absorption near-edge structure, Zinc ferrite, Zinc ferrite nanocrystals, Zinc ferrite spinels, Absorption spectra, Aerogels, Extended X ray absorption fine structure spectroscopy, Ions, Nanoparticles, Particle size, Silica gel, Structural properties, X ray absorption near edge structure spectroscopy, X ray absorption spectroscopy, Zinc, Zinc compounds, ferric ion, ferrite, nanoparticle, silicon dioxide, zinc, article, chemical structure, chemistry, gel, particle size, porosity, surface property, X ray absorption spectroscopy, Ferric Compounds, Gels, Molecular Structure, Nanoparticles, Particle Size, Porosity, Silicon Dioxide, Surface Properties, X-Ray Absorption Spectroscopy, Zinc
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 09 Jan 2015 09:14 UTC
Last Modified: 29 May 2019 13:56 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46158 (The current URI for this page, for reference purposes)
  • Depositors only (login required):