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EDS, HRTEM/STEM, and X-ray absorption spectroscopy studies of co-substituted maghemite nanoparticles

Carta, D., Corrias, A., Falqui, A., Brescia, R., Fantechi, E., Pineider, F., Sangregorio, C. (2013) EDS, HRTEM/STEM, and X-ray absorption spectroscopy studies of co-substituted maghemite nanoparticles. Journal of Physical Chemistry C, 117 (18). pp. 9496-9506. ISSN 1932-7447. (doi:10.1021/jp401706c) (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/10.1021/jp401706c

Abstract

A detailed study of the composition and structure of Co-doped maghemite nanoparticles with systematically varying composition has been carried out by transmission electron microscopy (TEM) techniques, such as high-resolution TEM, scanning TEM, and energy-dispersive X-ray spectrometry, and by X-ray absorption spectroscopy at the Fe and Co K-edges, analyzing both the extended X-ray absorption fine structure and the X-ray absorption near-edge structure regions. The latter techniques, in particular, allow us to determine the degree of inversion of divalent and trivalent metal ions among the octahedral and tetrahedral sites in the spinel structure of the nanoparticles and give detailed information on atomic distances. The samples consist of single-crystal nanoparticles with a composition corresponding to the Fe/Co ratio used in the synthesis. The degree of inversion is quite similar for all samples and close to the value found in a pure cobalt ferrite bulk sample. © 2013 American Chemical Society.

Item Type: Article
DOI/Identification number: 10.1021/jp401706c
Uncontrolled keywords: Energy dispersive x-ray, Extended X-ray absorption fine structures, High-resolution TEM, Maghemite nanoparticle, Tetrahedral sites, Transmission electron microscopy (TEM), Trivalent metal ions, X-ray absorption near-edge structure, Crystal atomic structure, Extended X ray absorption fine structure spectroscopy, Metal ions, Nanoparticles, Transmission electron microscopy, X ray absorption spectroscopy, Synthesis (chemical)
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: 16 Dec 2014 12:28 UTC
Last Modified: 29 May 2019 13:56 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46153 (The current URI for this page, for reference purposes)
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