Bogart, LK;
Blanco-Andujar, C;
Pankhurst, QA;
(2018)
Environmental oxidative aging of iron oxide nanoparticles.
Applied Physics Letters
, 113
, Article 133701. 10.1063/1.5050217.
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Abstract
The environmental aging of functional iron oxide nanomaterials, especially those used in biomedical applications, may have significant consequences for both their mechanism of action and their safety profile. However, to date, there has been no way to systematically measure this property, and the problem has been largely overlooked. We show here that a recently proposed "center of gravity" method for determining the composition of magnetite (Fe3O4) and maghemite (γ-Fe2O3) mixtures via57Fe Mössbauer spectroscopy can be applied to the matter. We show that a long-established diffusion model can be used to characterize the oxidative aging process, yielding a parametric (and therefore predictive) description of the magnetite-to-maghemite oxidation processes occurring within the nanoparticles.
| Type: | Article |
|---|---|
| Title: | Environmental oxidative aging of iron oxide nanoparticles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.5050217 |
| Publisher version: | http://dx.doi.org/10.1063/1.5050217 |
| Language: | English |
| Additional information: | © 2018 Author(s). This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10058230 |
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