Silica has been well-studied as dispersions in organic solvents, traditionally called ¿organosols¿. One surfactant that is known to aid dispersion of silica is cationic didodecyldimethylammonium bromide (DDAB). The counterion of this surfactant can be readily swapped for a magnetic analogue, which results in particles that are both electrophoretically and magnetophoretically mobile, a new development in functional nanoparticles. In order to understand the mechanism by which DDAB and its analogues modify silica particle surfaces: SANS measurements will reveal the surface structures formed.