Structural organization of water-based ferrofluids with sterical stabilization as revealed by SANS

M. Balasoiu, M. V. Avdeev, V. L. Aksenov, D. Hasegan, V. M. Garamus, A. Schreyer, D. Bica, L. Vékás

Research output: Conference article

22 Citations (Scopus)

Abstract

Small-angle neutron scattering (SANS) with contrast variation is applied to reveal structural organization of a water-based ferrofluid where magnetite nanoparticles are sterically stabilized by the double layer of dodecylbenzenesulphonic acid (DBS). The contrast is changed by the use of different ratios between light and heavy water in the carrier. The modified basic functions are introduced and determined following the analysis of the shape scattering from the colloidal particles in the fluid. Three types of particles are detected, which are presumably initial particles (size ∼20 nm), secondary fractal aggregates (size > 250 nm) and micelles of DBS (size ∼5 nm). The found effective match point (35% of D2O) gives the 26 vol% content of magnetite in the initial particles.

Original languageEnglish
Pages (from-to)e225-e228
JournalJournal of Magnetism and Magnetic Materials
Volume300
Issue number1
DOIs
Publication statusPublished - máj. 2006
EventThird International Symposium on Magnetism 2005 -
Duration: jún. 26 2005jún. 30 2005

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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