Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10139980" target="_blank" >RIV/00216208:11320/13:10139980 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/13:43895505 RIV/60461373:22330/13:43895505

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jmmm.2013.02.051" target="_blank" >http://dx.doi.org/10.1016/j.jmmm.2013.02.051</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2013.02.051" target="_blank" >10.1016/j.jmmm.2013.02.051</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles

Popis výsledku v původním jazyce

The effect of a hydrophobic (oleic acid) coating on the magnetic properties of maghemite (gamma-Fe2O3) nanoparticles was investigated. The nanoparticles were prepared by a novel bi-phasic co-precipitation route and their properties compared with uncoatednanoparticles and nanoparticles prepared by a standard single-phase process. The oleic acid coated nanoparticles had a mean diameter of 6 nm when the two-phase precipitation procedure was used compared to 12 nm for nanoparticles prepared in a single phase under otherwise identical conditions. Super Quantum Interference Device measurements show superparamagnetism of the nanoparticles, with a saturation magnetization at 4 K to be 66.4 emu/g and 89.0 emu/g for the coated nanoparticles obtained by two- andsingle-phase procedure, respectively. Zero-field-cooled and field-cooled curves reveal a dramatic shift in the blocking temperature of the coated nanoparticles, and a significant change in their anisotropy. The hydrophobic nanoparticles

Název v anglickém jazyce

Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles

Popis výsledku anglicky

The effect of a hydrophobic (oleic acid) coating on the magnetic properties of maghemite (gamma-Fe2O3) nanoparticles was investigated. The nanoparticles were prepared by a novel bi-phasic co-precipitation route and their properties compared with uncoatednanoparticles and nanoparticles prepared by a standard single-phase process. The oleic acid coated nanoparticles had a mean diameter of 6 nm when the two-phase precipitation procedure was used compared to 12 nm for nanoparticles prepared in a single phase under otherwise identical conditions. Super Quantum Interference Device measurements show superparamagnetism of the nanoparticles, with a saturation magnetization at 4 K to be 66.4 emu/g and 89.0 emu/g for the coated nanoparticles obtained by two- andsingle-phase procedure, respectively. Zero-field-cooled and field-cooled curves reveal a dramatic shift in the blocking temperature of the coated nanoparticles, and a significant change in their anisotropy. The hydrophobic nanoparticles

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

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Svazek periodika

339

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

106-113

Kód UT WoS článku

000318904100019

EID výsledku v databázi Scopus

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