Interface roughness correlation in diblock copolymer brushes synthesized by atom transfer radical polymerization

The interface roughness correlation in diblock copolymer brushes synthesized by atom transfer radical polymerization was studied. The interfaces of diblock copolymer brushes can be correlated over a wide range of thicknesses. The existence of the correlation is not an artifact of deposition history, and that weakening the segregation at the internal interface by swelling with a nonselective good solvent weakens the interface correlation. The correlation is found for thicknesses much higher than those for which correlation is seen in small molecule liquids.