Interfacial strain and defects in asymmetric Fe-Mn oxide hybrid nanoparticles
2016 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 8, no 29, 14171-14177 p.Article in journal (Refereed) Published
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, 14171-14177 p.
Nano Technology Materials Engineering
IdentifiersURN: urn:nbn:se:uu:diva-304552DOI: 10.1039/c6nr01373bISI: 000381815000041PubMedID: 27385323OAI: oai:DiVA.org:uu-304552DiVA: diva2:1033311
FunderKnut and Alice Wallenberg FoundationSwedish Research Council