Diffuse x-ray scattering study of interfacial structure of self-assembled conjugated polymers

The interfacial structures of self-assembled heterostructures through alternate deposition of conjugated and nonconjugated polymers were studied by x-ray reflectivity and nonspecular scattering. We found that the interfacial width including the effects of both interdiffusion and interfacial roughness (correlated) was mainly contributed by the latter one. The self-assembled deposition induced very small interdiffusion between layers. The lateral correlation length ξ_ll grew as a function of deposition time (or film thickness) described by a power law ξll^αtβ/H and was also observed from the off-specular scattering.