Transverse Relaxivity of Nanoparticle Contrast Agents for MRI: Different Magnetic Cores and Coatings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11110%2F18%3A10386450" target="_blank" >RIV/00216208:11110/18:10386450 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00497625 RIV/00216208:11320/18:10386450 RIV/00023001:_____/18:00077412

Výsledek na webu

<a href="https://doi.org/10.1109/TMAG.2018.2844253" target="_blank" >https://doi.org/10.1109/TMAG.2018.2844253</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TMAG.2018.2844253" target="_blank" >10.1109/TMAG.2018.2844253</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transverse Relaxivity of Nanoparticle Contrast Agents for MRI: Different Magnetic Cores and Coatings

Popis výsledku v původním jazyce

Four types of magnetic nanoparticles were synthesized, namely, the La(0.65)Sr(0.35)MnO(3)and La0.80Na0.20MnO3 perovskite manganites and the Mn0.61Zn0.42Fe1.97O3 and Co0.44Zn0.70Fe1.86O4 spinel ferrites. Subsequent coating with silica provided typical core-shell particles with the mean shell thickness of 14-19 nm and the mean size of cores of 49-52 nm in the case of manganites and 26-33 nm in the case of ferrites. Moreover, two other surface modifications were employed for Mn-Zn ferrite nanoparticles, specifically coating with titania, leading to larger clusters with more complex morphology, and the stabilization by citrate anions. The products were characterized by powder X-ray diffraction and transmission electron microscopy, and their magnetic properties were probed by SQUID magnetometry. The main attention was devoted to the relaxometry on aqueous suspensions of particles in a magnetic field of 0.5 T. For distinct types of the prepared core-shell nanoparticles, the temperature dependence of transverse relaxivity was measured and the role of different relaxation regimes was analyzed.

Název v anglickém jazyce

Transverse Relaxivity of Nanoparticle Contrast Agents for MRI: Different Magnetic Cores and Coatings

Popis výsledku anglicky

Four types of magnetic nanoparticles were synthesized, namely, the La(0.65)Sr(0.35)MnO(3)and La0.80Na0.20MnO3 perovskite manganites and the Mn0.61Zn0.42Fe1.97O3 and Co0.44Zn0.70Fe1.86O4 spinel ferrites. Subsequent coating with silica provided typical core-shell particles with the mean shell thickness of 14-19 nm and the mean size of cores of 49-52 nm in the case of manganites and 26-33 nm in the case of ferrites. Moreover, two other surface modifications were employed for Mn-Zn ferrite nanoparticles, specifically coating with titania, leading to larger clusters with more complex morphology, and the stabilization by citrate anions. The products were characterized by powder X-ray diffraction and transmission electron microscopy, and their magnetic properties were probed by SQUID magnetometry. The main attention was devoted to the relaxometry on aqueous suspensions of particles in a magnetic field of 0.5 T. For distinct types of the prepared core-shell nanoparticles, the temperature dependence of transverse relaxivity was measured and the role of different relaxation regimes was analyzed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30224 - Radiology, nuclear medicine and medical imaging

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>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

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

—

Svazek periodika

54

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000447832100171

EID výsledku v databázi Scopus

2-s2.0-85049084972