Structural characterization of concentrated aqueous ferrofluids

A. V. Nagornyi, V. Socoliuc, V. I. Petrenko, L. Almasy, O. I. Ivankov, M. V. Avdeev, L. A. Bulavin, L. Vekas

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Abstract

Structure characterizations of concentrated water-based magnetic fluids stabilized by oleic and lauric acids were done by means of small-angle neutron scattering (SANS) and complemented by dynamic light scattering and magnetization analysis. Stability of ferrofluids with time against sedimentation was concluded despite the presence of aggregates in solutions. Differences in the average sizes of individual polydisperse magnetite nanoparticles coated with surfactants and their aggregates were revealed. Structural parameters obtained from SANS have been confirmed by magnetogranulometry data. The comparative analysis of the aggregation and its change upon dilution is made basing on the data of SANS and dynamic light scattering techniques.

Original languageEnglish
Article number166445
JournalJournal of Magnetism and Magnetic Materials
Volume501
DOIs
Publication statusPublished - May 1 2020

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Keywords

  • Aggregate
  • Aqueous ferrofluids
  • Magnetic fluids
  • Small-angle neutron scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Nagornyi, A. V., Socoliuc, V., Petrenko, V. I., Almasy, L., Ivankov, O. I., Avdeev, M. V., Bulavin, L. A., & Vekas, L. (2020). Structural characterization of concentrated aqueous ferrofluids. Journal of Magnetism and Magnetic Materials, 501, [166445]. https://doi.org/10.1016/j.jmmm.2020.166445