Interparticle interaction effect on magnetization dynamics of multicore iron oxide particles in alternating magnetic field

Kód výsledku v IS VaVaI

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Nalezeny alternativní kódy

RIV/70883521:28610/17:63516981

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Interparticle interaction effect on magnetization dynamics of multicore iron oxide particles in alternating magnetic field

Popis výsledku v původním jazyce

Magnetic multicore iron oxide particles are nowadays intensively studied for application in magnetic hyperthermia. These particles compose of superparamagnetic iron oxide cores densely packed due to magnetic interactions. The magnetic interaction leads to the increase of energy barrier of magnetization reversal and therefore the heating losses in alternating magnetic field can be enhanced. However, the magnetization dynamics of such systems in alternating magnetic field remains still unclear. Apparently, the main parameters influencing the interaction with magnetic field are the morphology of single cores and multicore particles as well as the intercore and interparticle magnetic interactions. In the current work, we investigate the effect of interparticle interactions between the multicore particles on the heating efficiency of magnetic dispersions in alternating magnetic field. Two types of multicore particles were prepared: naked multicore particles displaying dipole-dipole interactions and multicore particles with surface coating preventing the interaction of multicores. Both types of multicore particles were composed of 13 nm iron oxide cores and have the hydrodynamic size of about 85 nm. To study the absorption of AMF energy, multicore particles were dispersed in media with different viscosity (water and agarose). It was demonstrated that covered multicore particles display significantly higher heating efficiency in both media than naked particles, which is associated with the elimination of dipole-dipole interaction between multicores.

Název v anglickém jazyce

Interparticle interaction effect on magnetization dynamics of multicore iron oxide particles in alternating magnetic field

Popis výsledku anglicky

Magnetic multicore iron oxide particles are nowadays intensively studied for application in magnetic hyperthermia. These particles compose of superparamagnetic iron oxide cores densely packed due to magnetic interactions. The magnetic interaction leads to the increase of energy barrier of magnetization reversal and therefore the heating losses in alternating magnetic field can be enhanced. However, the magnetization dynamics of such systems in alternating magnetic field remains still unclear. Apparently, the main parameters influencing the interaction with magnetic field are the morphology of single cores and multicore particles as well as the intercore and interparticle magnetic interactions. In the current work, we investigate the effect of interparticle interactions between the multicore particles on the heating efficiency of magnetic dispersions in alternating magnetic field. Two types of multicore particles were prepared: naked multicore particles displaying dipole-dipole interactions and multicore particles with surface coating preventing the interaction of multicores. Both types of multicore particles were composed of 13 nm iron oxide cores and have the hydrodynamic size of about 85 nm. To study the absorption of AMF energy, multicore particles were dispersed in media with different viscosity (water and agarose). It was demonstrated that covered multicore particles display significantly higher heating efficiency in both media than naked particles, which is associated with the elimination of dipole-dipole interaction between multicores.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

8th International Conference on Nanomaterials - Research &amp; Application (NANOCON 2016)

ISBN

978-80-87294-71-0

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

5

Strana od-do

520-524

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

19. 10. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000410656100091