Clusters of magnetic nanoparticles as contrast agents for MRI: effect of aggregation on transverse relaxivity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00450596" target="_blank" >RIV/68378271:_____/15:00450596 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/15:43899722 RIV/00216275:25310/15:39899658

Výsledek na webu

<a href="http://dx.doi.org/10.1109/TMAG.2015.2438112" target="_blank" >http://dx.doi.org/10.1109/TMAG.2015.2438112</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TMAG.2015.2438112" target="_blank" >10.1109/TMAG.2015.2438112</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Clusters of magnetic nanoparticles as contrast agents for MRI: effect of aggregation on transverse relaxivity

Popis výsledku v původním jazyce

The effect of aggregation of magnetic nanoparticles on the transverse relaxivity (r2) is analyzed with respect to the size of clusters. The nanoparticles employed are based on La0.75Sr0.25MnO3 phase with the mean size of crystallites dXRD = 26 nm. Silica coating provides colloidally stable particles whose magnetic cores are mostly composed of clusters of manganite crystallites. The product is subjected to differential centrifugation and several size fractions, possessing the same dXRD but differing in the effective size of magnetic cores, are isolated. Thorough analyses of their size distributions by TEM and DLS are carried out together with SQUID magnetometry. The concentration of particles is accurately determined by AAS and a detailed study of r2 at the magnetic field B0 = 0.5 T is performed. The highest r2 values are clearly observed for mid-sized clusters and the temperature dependence of r2 resembles the evolution of magnetization with temperature.

Název v anglickém jazyce

Clusters of magnetic nanoparticles as contrast agents for MRI: effect of aggregation on transverse relaxivity

Popis výsledku anglicky

The effect of aggregation of magnetic nanoparticles on the transverse relaxivity (r2) is analyzed with respect to the size of clusters. The nanoparticles employed are based on La0.75Sr0.25MnO3 phase with the mean size of crystallites dXRD = 26 nm. Silica coating provides colloidally stable particles whose magnetic cores are mostly composed of clusters of manganite crystallites. The product is subjected to differential centrifugation and several size fractions, possessing the same dXRD but differing in the effective size of magnetic cores, are isolated. Thorough analyses of their size distributions by TEM and DLS are carried out together with SQUID magnetometry. The concentration of particles is accurately determined by AAS and a detailed study of r2 at the magnetic field B0 = 0.5 T is performed. The highest r2 values are clearly observed for mid-sized clusters and the temperature dependence of r2 resembles the evolution of magnetization with temperature.

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)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

IEEE Transactions on Magnetics

ISSN

0018-9464

e-ISSN

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Svazek periodika

51

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

3

Strana od-do

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Kód UT WoS článku

000364770500373

EID výsledku v databázi Scopus

2-s2.0-84946150236