Synthesis of Fe/Fe3O4 core-shell nanoparticles by electrical explosion of the iron wire in an oxygen-containing atmosphere

Magnetic nanoparticles based on iron and its oxides are promising in various biomedical applications. Currently, as a rule, ferromagnetic iron oxide particles with a low specific magnetic moment are used for medical purposes. In the present work, a new method for the synthesis of magnetic nanopartic...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2021-03, Vol.23 (3), Article 73
Main Authors: Lozhkomoev, A. S., Pervikov, A. V., Kazantsev, S. O., Sharipova, A. F., Rodkevich, N. G., Toropkov, N. E., Suliz, K. V., Svarovskaya, N. V., Kondranova, A. M., Lerner, M. I.
Format: Article
Language:English
Subjects:
Argon
Atmosphere
Biomedical materials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Core-shell particles
Core-shell structure
Ferromagnetism
Inert atmospheres
Inorganic Chemistry
Iron
Iron oxides
Lasers
Magnetic moments
Materials Science
Nanoparticles
Nanotechnology
Optical Devices
Optics
Oxides
Oxygen
Photonics
Physical Chemistry
Research Paper
Synthesis
Wire
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Summary:Magnetic nanoparticles based on iron and its oxides are promising in various biomedical applications. Currently, as a rule, ferromagnetic iron oxide particles with a low specific magnetic moment are used for medical purposes. In the present work, a new method for the synthesis of magnetic nanoparticles based on the electric explosion of a Fe wire is proposed. When wires are dispersed by high current electric pulse in an inert atmosphere containing less than 5% oxygen, nanoparticles with a core-shell structure are formed, where the core is α-Fe and the shell is formed by a mixture of oxides Fe 3 O 4 and FeO. The oxygen concentration in the buffer gas has been found to determine the size of the resulting nanoparticles, their shape, and iron content. The iron oxide shell protects the iron core from the external environment, preventing the rapid dissolution of Fe containing in the nanoparticles, in contrast to nanoparticles obtained in argon atmosphere. The specific magnetic moment of nanoparticles, depending on the content of iron oxides, varies from 90 to 180 emu/g.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-021-05180-x