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Correlation between coprecipitation reaction course and magneto-structural properties of iron oxide nanoparticles

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dc.title Correlation between coprecipitation reaction course and magneto-structural properties of iron oxide nanoparticles en
dc.contributor.author Smolková, Ilona Sergeevna
dc.contributor.author Kazantseva, Natalia E.
dc.contributor.author Parmar, Harshida
dc.contributor.author Babayan, Vladimir Artur
dc.contributor.author Smolka, Petr
dc.contributor.author Sáha, Petr
dc.relation.ispartof Materials Chemistry and Physics
dc.identifier.issn 0254-0584 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 155
dc.citation.spage 178
dc.citation.epage 190
dc.type article
dc.language.iso en
dc.publisher Elsevier, Ltd.
dc.identifier.doi 10.1016/j.matchemphys.2015.02.022
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0254058415001170
dc.subject Magnetic materials en
dc.subject Magnetic properties en
dc.subject Nucleation en
dc.subject Precipitation en
dc.description.abstract The effect of coprecipitation reaction course on the magneto-structural properties of iron oxide nanoparticles and, as a consequence, on their heating ability in alternating magnetic fields allowed in magnetic hyperthermia was studied. The parameters of coprecipitation reaction are chosen to ensure the repeatability of nanoparticles features: narrow size distribution, high crystallinity, and magnetic properties. It is established that the reaction should be carried out in an alkaline medium with slow addition of a solution of iron (II) and iron (III) salts to excess alkali. This provides a simultaneous homogeneous nucleation and a rapid growth of nanocrystals during the first minutes of the reaction. After that the reaction proceeds to the stage of slow growth of nanoparticles, which continues up to the complete exhaustion of the solution of salts. Nanoparticles unite in aggregates during the synthesis. The particles in aggregates are characterized by average size of 13 nm and polydispersity index 0.3, mixed phase composition including pure phase magnetite and the products of its oxidation (non-stoichiometric magnetite and maghemite nanoparticles). Material displays magnetization saturation of 56 emu g-1, non-zero hysteresis and distinct sextets on Mössbauer spectrum at room temperature. A glycerol dispersion of aggregated magnetic nanoparticles provides a temperature increase from 37 °C to 45 °C within tens of seconds under exposure to alternating magnetic field allowed for application in magnetic hyperthermia. The high heating ability is associated with interparticle magnetic interactions within aggregates leading to the enhancement of energy barrier of magnetization reversal. © 2015 Elsevier B.V. All rights reserved. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1004259
utb.identifier.rivid RIV/70883521:28610/15:43873041!RIV16-MSM-28610___
utb.identifier.obdid 43873461
utb.identifier.scopus 2-s2.0-84924551004
utb.identifier.wok 000351649400024
utb.identifier.coden MCHPD
utb.source j-scopus
dc.date.accessioned 2015-05-22T08:01:37Z
dc.date.available 2015-05-22T08:01:37Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Smolková, Ilona Sergeevna
utb.contributor.internalauthor Kazantseva, Natalia E.
utb.contributor.internalauthor Parmar, Harshida
utb.contributor.internalauthor Babayan, Vladimir Artur
utb.contributor.internalauthor Smolka, Petr
utb.contributor.internalauthor Sáha, Petr
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