Oleate-based hydrothermal preparation of CoFe2O4 nanoparticles, and their magnetic properties with respect to particle size and surface coating

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10296221" target="_blank" >RIV/00216208:11310/15:10296221 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/15:00448155 RIV/61389013:_____/15:00448155
Result on the web
<a href="http://dx.doi.org/10.1016/j.jmmm.2015.04.090" target="_blank" >http://dx.doi.org/10.1016/j.jmmm.2015.04.090</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmmm.2015.04.090" target="_blank" >10.1016/j.jmmm.2015.04.090</a>

Result language
angličtina
Original language name
Oleate-based hydrothermal preparation of CoFe2O4 nanoparticles, and their magnetic properties with respect to particle size and surface coating
Original language description
We present a facile and high yield synthesis of cobalt ferrite nanoparticles by hydrothermal hydrolysis of Co-Fe oleate in the presence of pentanol/octanol/toluene and water at 180 or 220 degrees C. The particle size (610 nm) was controlled by the composition of the organic solvent and temperature. Magnetic properties were then investigated with respect to the particle size and surface modification with citric acid or titanium dioxide (leading to hydrophilic particles). The as prepared hydrophobic nanoparticles (coated by oleic acid) had a minimum inter-particle distance of 2.5 nm. Their apparent blocking temperature (estimated as a maximum of the zero-field-cooled magnetization) was 180 K, 280 K and 330 K for the particles with size of 6,0 and 10.5 nm, respectively. Replacement of oleic acid on the surface by citric acid decreased inter particle distance to less than 1 nm, and increased blocking temperature by ca. 10 K. On the other hand, coating with Uranium dioxide, supported by nit
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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