Papers by Author: V.M. Garamus

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Authors: A.V. Feoktystov, M.V. Avdeev, V. L. Aksenov, V.I. Petrenko, L.A. Bulavin, Doina Bica, L. Vekas, V.M. Garamus, R. Willumeit
Abstract: Contrast variation method in small-angle neutron scattering (non-polarized neutrons) is applied to magnetic fluids (MFs) with magnetite dispersed in benzene and coated with myristic or oleic acid in zero external magnetic field. The basic functions approach for polydisperse superparamagnetic systems is used to get structure parameters of particles in MFs.
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Authors: V.M. Nadutov, V.M. Garamus, J. Rawers
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Authors: M.V. Avdeev, Doina Bica, L. Vekas, V. L. Aksenov, A.V. Feoktystov, L. Rosta, V.M. Garamus, R. Willumeit
Abstract: The structure of magnetic fluids (magnetite in decahydronaphtalene) stabilized with saturated mono-carboxylic acids of different chain lengths (lauric, myristic, palmitic and stearic acids) is studied by means of magnetization analysis and small-angle neutron scattering. It is shown that magnetite nanoparticles are dispersed in the carrier approximately with the same size distribution whose mean value and width are significantly less as compared to the classical stabilization with non-saturated oleic acid. The found thickness of the surfactant shell around magnetite is analyzed with respect to stabilizing properties of mono-carboxylic acids.
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