Size dependent heating efficiency of multicore iron oxide particles in low-power alternating magnetic fields

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F17%3A63516382" target="_blank" >RIV/70883521:28110/17:63516382 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28610/17:63516382

Result on the web

<a href="http://dx.doi.org/10.12693/APhysPolA.131.663" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.131.663</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.131.663" target="_blank" >10.12693/APhysPolA.131.663</a>

Result language

angličtina

Original language name

Size dependent heating efficiency of multicore iron oxide particles in low-power alternating magnetic fields

Original language description

Aggregates of superparamagnetic nanoparticles, so called multicore particles get much attention due to collective magnetic behaviour. Despite the fact that saturation magnetization and coercivity of multicore particles are lower than for single particles of comparable size, they can generate large amount of heat in alternating magnetic field. This makes them promising for magnetic hyperthermia. However, correlation between internal magnetic structure of multicore particles and their heating ability in alternating magnetic fields are not clear yet. Detailed experimental investigations are required to determine the optimal sizes of multicore particles and the alternating magnetic field parameters to obtain maximal heat. In this study, we demonstrated how hydrodynamic size of multicore particles influences alternating magnetic field energy absorption. Dense aggregates composed of bare magnetic iron oxide nanoparticles of 13 nm were obtained by coprecipitation. Further peptization allowed to gain aqueous dispersions of multicore particles with various hydrodynamic size, varing from 85 to 170 nm, due to electrostatic stabilization. Multicore particles dispersions have saturation magnetization of 40 A m(2)/kg(Fe3O4) and coercivity of 79.6 A/m regardless of their size. Dispersion of 85 nm multicore particles is stable and provides specific loss power of 42 W/g(Fe). Further increase of hydrodynamic size leads to low stability and loss of the ability to generate heat in alternating magnetic field.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/LO1504" target="_blank" >LO1504: Centre of Polymer Systems Plus</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Acta Physica Polonica A

ISSN

0587-4246

e-ISSN

—

Volume of the periodical

131

Issue of the periodical within the volume

4

Country of publishing house

PL - POLAND

Number of pages

3

Pages from-to

663-665

UT code for WoS article

000400907900018

EID of the result in the Scopus database

2-s2.0-85019619159