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Interfacial strain and defects in asymmetric Fe-Mn oxide hybrid nanoparticles
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 72016 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 8, no 29, p. 14171-14177Article in journal (Refereed) Published
Abstract [en]

Asymmetric Fe-Mn oxide hybrid nanoparticles have been obtained by a seed-mediated thermal decomposition-based synthesis route. The use of benzyl ether as the solvent was found to promote the orientational growth of Mn1-xO onto the iron oxide nanocube seeds yielding mainly dimers and trimers whereas 1-octadecene yields large nanoparticles. HRTEM imaging and HAADF-STEM tomography performed on dimers show that the growth of Mn1-xO occurs preferentially along the edges of iron oxide nanocubes where both oxides share a common crystallographic orientation. Fourier filtering and geometric phase analysis of dimers reveal a lattice mismatch of 5% and a large interfacial strain together with a significant concentration of defects. The saturation magnetization is lower and the coercivity is higher for the Fe-Mn oxide hybrid nanoparticles compared to the iron oxide nanocube seeds.

Place, publisher, year, edition, pages
2016. Vol. 8, no 29, p. 14171-14177
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Chemical Sciences Nano Technology Materials Engineering Physical Sciences
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URN: urn:nbn:se:su:diva-134192DOI: 10.1039/c6nr01373bISI: 000381815000041PubMedID: 27385323OAI: oai:DiVA.org:su-134192DiVA, id: diva2:1040471
Available from: 2016-10-27 Created: 2016-10-03 Last updated: 2022-02-28Bibliographically approved

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Tai, Cheuk-WaiBergström, Lennart

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