Surfactants are known to charge colloidal surfaces in nonpolar solvents, but only a small number of different molecules have been explored. Recent experiments demonstrate that varying the tailgroup of sodium dialkylsulfosuccinate surfactants (analogues of double-chained Aerosol OT, AOT) can significantly influence the action as charge control additives (CCAs). An interesting and unexplained observation is that tri-chain surfactants are more effective CCAs than corresponding di-chain surfactants at all concentrations. By using tail-deuterated surfactants, SANS will be used to understand both the surface adsorption and inverse micelle structure of di- and tri-chain surfactants in the presence of sterically-stabilized PMMA colloids