Structural Characterisation study of FeCo alloy nanoparticles in a highly porous aerogel silica matrix

Carta, Daniela, Mountjoy, Gavin, Gass, Mhairi H., Navarra, Gabriele, Casula, Maria Francesca, Corrias, Anna (2007) Structural Characterisation study of FeCo alloy nanoparticles in a highly porous aerogel silica matrix. Journal of Chemical Physics, 127 (20). Article Number 204705. ISSN 0021-9606. (doi:10.1063/1.2799995) (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) (KAR id:9919)

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.
Official URL: http://dx.doi.org/10.1063/1.2799995

Abstract

A series of FeCo-SiO2 nanocomposite aerogels having different FeCo loadings of 3, 5, and 8 wt % were prepared using a novel urea-assisted sol-gel route. The size of the nanoparticles, which was estimated using Scherrer analysis of the main peak of the x-ray diffraction pattern, varies from 3 to 8 nm. X-ray absorption fine structure (EXAFS) and x-ray absorption near edge structure (XANES) techniques at both Fe and Co K edges were used to investigate the structure of the FeCo nanoparticles. EXAFS and XANES show that FeCo nanoparticles have the typical bcc structure. Evidence of oxidation was observed in low FeCo content aerogels. Spatially resolved electron energy loss spectroscopy analysis suggests the formation of a passivation layer of predominantly iron oxide.

Item Type:	Article
DOI/Identification number:	10.1063/1.2799995
Subjects:	Q Science
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Anna Corrias
Date Deposited:	03 Jul 2008 13:47 UTC
Last Modified:	16 Nov 2021 09:48 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/9919 (The current URI for this page, for reference purposes)

University of Kent Author Information

Carta, Daniela.

Creator's ORCID:
CReDIT Contributor Roles:

Mountjoy, Gavin.

Creator's ORCID:	https://orcid.org/0000-0002-6495-2006
CReDIT Contributor Roles:

Corrias, Anna.

Creator's ORCID:	https://orcid.org/0000-0002-5190-8196
CReDIT Contributor Roles:

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