Polarized attenuated total reflection Fourier transform infrared spectroscopy was used to assess the mobility and orientation of sodium dioctylsulfosuccinate surfactant molecules at the film-air (F-A) and film-substrate (F-S) interfaces in electrodeposited latex films. Copolymer compositions ranging from 100% poly(n-BA) to 50%/50% Sty/n-BA were ex amined. When particle diameters are 50 and 100 nm, it appears that the 1046 cm(-1) band is detected at the F-A and F-S interfaces. However, the 1056 cm(-1) band is detected only for 50%/50% Sty/n-BA at the F-A interface with an average particle diameter of 100 nm. These studies allow us to determine that at the F-A interface, SDOSS surfactant molecules are preferentially parallel to the surface. Utilizing electrodeposition of latex particles, it is possible to slow the coalescence process, which ultimately allows us to follow diffusion and mobility of low-molecular-weight SDOSS surfactant molecules.