Controlled Oxidation of Cobalt Nanoparticles to Obtain Co/CoO/Co<sub>3</sub>O<sub>4</sub> Composites with Different Co Content
Aleksandr S. Lozhkomoev,
Alexander V. Pervikov,
Sergey O. Kazantsev,
Konstantin V. Suliz,
Roman V. Veselovskiy,
Andrey A. Miller,
Marat I. Lerner
Affiliations
Aleksandr S. Lozhkomoev
Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
Alexander V. Pervikov
Laboratory of Physical Chemistry of Ultrafine Materials, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
Sergey O. Kazantsev
Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
Konstantin V. Suliz
Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
Roman V. Veselovskiy
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, 123242 Moscow, Russia
Andrey A. Miller
Shared Use Center “Nanotech”, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
Marat I. Lerner
Laboratory of Physical Chemistry of Ultrafine Materials, Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 634021 Tomsk, Russia
The paper studies patterns of interaction of electroexplosive Co nanoparticles with air oxygen during heating. The characteristics of Co nanoparticles and composite Co/CoO/Co3O4 nanoparticles formed as a result of oxidation were studied using transmission electron microscopy, X-ray phase analysis, thermogravimetric analysis, differential scanning calorimetry, and vibrating sample magnetometry. It was established that nanoparticles with similar morphology in the form of hollow spheres with different content of Co, CoO, and Co3O4 can be produced by varying oxidation temperatures. The influence of the composition of composite nanoparticles on their magnetic characteristics is shown.
