Research Center for Engineering of
                Systems with Complex Fluids
Title: Structural organization of water - based ferrofluids with sterical stabilization as revealed by SANS
Published In: Journal of Magnetism and Magnetic Materials, Vol. 300, pp. 225-228
Description: 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 similar to 20 nm), secondary fractal aggregates (size 4250 nm) and micelles of DBS (size similar to 5 nm). The found effective match point (35% of D2O) gives the 26 vol% content of magnetite in the initial particles.
ISBN: 
ISSN:ISSN: 0304-8853
DOI:DOI: 10.1016/j.jmmm.2005.10.085
Publication year: 2006
Keywords: Ferrofluids; Magnetic fluids; Small-angle neutron scattering; Contrast variation
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Authors: BALASOIU Maria , AVDEEV Mikhail , AKSENOV Viktor Lazarevich , HASEGAN Dumitru , GARAMUS Vasil , SCHREYER Andreas , BICA Doina , VEKAS Ladislau ,
Type: International Journal Article
Link: http://dx.doi.org/10.1016/j.jmmm.2005.10.085
Laboratory: Magnetometry Laboratory
Institution: ARFT