A. I. Zhakin, A. E. Kuz’ko, A. P. Kuz’menko, Myu Ming Tan
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A Study of the Electrical Conductivity of Magnetic Fluids
The effects of electrical conductivity of magnetic fluids both in the presence and absence of an external magnetic field are studied. It is shown that magnetic fluids based on magnetite (Fe3O4) magnetic nanoparticles coated with surfactant additive oleic acid contain current conducting ions that are formed because of oleic acid molecules involved in dissociation and electrochemical processes. The key role of the electrochemical reactions of oleic acid molecules on the surface of chemically active Cu electrodes in producing the injection conductivity is proved. The anisotropy of the electrical conductivity of the magnetic fluid in an external magnetic field is analyzed for chemically active and inert electrodes. The nonstationary ion processes in near-electrode layers, which determine the kinetics of magnetic nanoparticles and autowaves in thin magnetic fluid films, are interpreted.
期刊介绍：
Surface Engineering and Applied Electrochemistry is a journal that publishes original and review articles on theory and applications of electroerosion and electrochemical methods for the treatment of materials; physical and chemical methods for the preparation of macro-, micro-, and nanomaterials and their properties; electrical processes in engineering, chemistry, and methods for the processing of biological products and food; and application electromagnetic fields in biological systems.
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