Topic
Magnetite
About: Magnetite is a research topic. Over the lifetime, 10277 publications have been published within this topic receiving 278071 citations.
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TL;DR: In this paper, a uniformly dispersed amorphous nanoparticles of magnetite in polyvinyl alcohol have been obtained by ultrasound radiation and the properties of the as-prepared composite material were characterized by various analytical methods.
Abstract: Uniformly dispersed amorphous nanoparticles of magnetite in polyvinyl alcohol have been obtained by ultrasound radiation. The properties of the as-prepared composite material were characterized by various analytical methods. We have found that the magnetite particles that were 12–20 nm in diameter were very well dispersed in the PVA. The magnetization measurements establish that the composite material is superparamagnetic in nature.
177 citations
TL;DR: In this paper, magnetite−silica nanocomposites were controllably synthesized by a sol−gel approach, using electrostatically stabilized magnetite nanoparticles as seeds.
Abstract: Magnetite−silica nanocomposites were controllably synthesized by a sol−gel approach, using electrostatically stabilized magnetite nanoparticles as seeds. By virtue of the complexation occurring between the iron ions on the magnetic nanoparticles and the citrate groups, highly stable magnetic fluid (MF) containing well-dispersed magnetite nanoparticles can be obtained. Controlling the surface modification degree, magnetite nanoparticles charged with different amount of citrate groups can be obtained for coating process with silica through the seeded sol−gel approach, and magnetite−silica nanocomposites with morphologies including irregular clusters, core−shell particles can be synthesized. Moreover, silica−magnetite particles with well-defined core−shell structure and controllable silica thickness can be synthesized.
176 citations
TL;DR: In this paper, it was shown that the fast electron hopping process in magnetite is essentially a pair-localized phenomenon, with the non-paired octahedral Fe 3+ ions not participating in the hopping process.
175 citations
TL;DR: In this article, L-lysine coated iron oxide (LCIO) nanoparticles were synthesized by a co-precipitation method in the presence of amino acid.
175 citations
TL;DR: In this article, a method for synthesizing PEG-coated magnetite particles for use in diagnostic imaging was described, and the effect of the molecular weight, reaction temperature and polymer concentration were investigated.
174 citations