Preparation of Mn-Zn ferrite nanoparticles and their silica-coated clusters: Magnetic properties and transverse relaxivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023001%3A_____%2F17%3A00060195" target="_blank" >RIV/00023001:_____/17:00060195 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/17:00473986 RIV/68378041:_____/17:00473986 RIV/00216275:25310/17:39901747

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0304885316326786?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0304885316326786?via%3Dihub</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>

Result language

angličtina

Original language name

Preparation of Mn-Zn ferrite nanoparticles and their silica-coated clusters: Magnetic properties and transverse relaxivity

Original language description

Hydrothermal synthesis of Mn1−xZnxFe2O4 nanoparticles followed by direct encapsulation of the as-grown 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 is 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 are characterized by powder X-ray diffraction, X-ray fluorescence spectroscopy, and SQUID magnetometry, and the composition close to x=0.4 is selected for the preparation of silica-coated clusters with the mean diameter of magnetic cores ≈25 nm. Their composite structure is 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, reveal 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 and is ascribed to a mechanism of transverse relaxation similar to the motional averaging regime.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

30224 - Radiology, nuclear medicine and medical imaging

Project

<a href="/en/project/GA16-04340S" target="_blank" >GA16-04340S: Oxide nanomagnets, their properties and interactions with biological systems</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

Journal of magnetism and magnetic materials

ISSN

0304-8853

e-ISSN

—

Volume of the periodical

427

Issue of the periodical within the volume

April

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

251-257

UT code for WoS article

000397199400045

EID of the result in the Scopus database

2-s2.0-85005996235