Preparation of Mn-Zn Ferrite Nanoparticles and their Silica-Coated Clusters: Magnetic Properties and Transverse Relaxivity
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39901747" target="_blank" >RIV/00216275:25310/17:39901747 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/68378271:_____/17:00473986 RIV/68378041:_____/17:00473986 RIV/00023001:_____/17:00060195
Výsledek na webu
<a href="http://dx.doi.org/10.1016/j.jmmm.2016.10.095" target="_blank" >http://dx.doi.org/10.1016/j.jmmm.2016.10.095</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmmm.2016.10.095" target="_blank" >10.1016/j.jmmm.2016.10.095</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Preparation of Mn-Zn Ferrite Nanoparticles and their Silica-Coated Clusters: Magnetic Properties and Transverse Relaxivity
Popis výsledku v původním jazyce
Hydrothermal synthesis of Mn1-xZnxFe2O4 nanoparticles followed by encapsulation of this material into silica is demonstrated as a fast and facile method for preparation of efficient negative contrast agents based on clusters of ferrite crystallites. At first, the hydrothermal procedure was optimized to achieve strictly single-phase magnetic nanoparticles of Mn-Zn ferrites in the compositional range of x ≈ 0.2–0.6 and with the mean size of crystallites ≈10 nm. The products were characterized by powder X-ray diffraction, X-ray fluorescence spectroscopy, and SQUID magnetometry, and the composition close to x = 0.4 was selected for the preparation of silica-coated clusters with the mean diameter of magnetic cores ≈25 nm. Their composite structure was studied by means of transmission electron microscopy combined with detailed image analysis and magnetic measurements in DC fields. The relaxometric studies, performed in the magnetic field of B0 = 0.5 T, revealed high transverse relaxivity (r2(20 °C) = 450 s-1 mmol(Me3O4)-1 L) with a pronounced temperature dependence, which correlates with the observed temperature dependence of magnetization.
Název v anglickém jazyce
Preparation of Mn-Zn Ferrite Nanoparticles and their Silica-Coated Clusters: Magnetic Properties and Transverse Relaxivity
Popis výsledku anglicky
Hydrothermal synthesis of Mn1-xZnxFe2O4 nanoparticles followed by encapsulation of this material into silica is demonstrated as a fast and facile method for preparation of efficient negative contrast agents based on clusters of ferrite crystallites. At first, the hydrothermal procedure was optimized to achieve strictly single-phase magnetic nanoparticles of Mn-Zn ferrites in the compositional range of x ≈ 0.2–0.6 and with the mean size of crystallites ≈10 nm. The products were characterized by powder X-ray diffraction, X-ray fluorescence spectroscopy, and SQUID magnetometry, and the composition close to x = 0.4 was selected for the preparation of silica-coated clusters with the mean diameter of magnetic cores ≈25 nm. Their composite structure was studied by means of transmission electron microscopy combined with detailed image analysis and magnetic measurements in DC fields. The relaxometric studies, performed in the magnetic field of B0 = 0.5 T, revealed high transverse relaxivity (r2(20 °C) = 450 s-1 mmol(Me3O4)-1 L) with a pronounced temperature dependence, which correlates with the observed temperature dependence of magnetization.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
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OECD FORD obor
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)
Návaznosti výsledku
Projekt
<a href="/cs/project/GA16-04340S" target="_blank" >GA16-04340S: Oxidové nanomagnety, jejich vlastnosti a interakce s biologickými systémy</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Magnetism and Magnetic Materials
ISSN
0304-8853
e-ISSN
—
Svazek periodika
427
Číslo periodika v rámci svazku
April
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
7
Strana od-do
251-257
Kód UT WoS článku
000397199400045
EID výsledku v databázi Scopus
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