Structure of water-based ferrofluids with sodium oleate and polyethylene glycol stabilization by small-angle neutron scattering: contrast-variation experiments

The effect of the addition of polyethylene glycol (PEG) on the structure of a water-based ferrofluid (magnetite coated with sodium oleate) is followed using contrast variation in small-angle neutron scattering. A significant change in the complex aggregates, as a result of PEG adsorption by magnetite, is revealed.