Diblock copolymer ordering induced by patterned surfaces
School of Physics and Astronomy
Raymond and Beverly Sackler Faculty of Exact Sciences
Tel Aviv University - 69978 Ramat Aviv, Israel
Accepted: 12 January 2001
We use a Ginzburg-Landau free-energy functional to investigate diblock copolymer morphologies when the copolymer melt interacts with one surface or is confined between two chemically patterned surfaces. For temperatures above the order-disorder transition a complete linear response description of the copolymer melt is given, in terms of an arbitrary two-dimensional surface pattern. The appearance of order in the direction parallel to the surface is found as a result of the order in the perpendicular direction. Below the order-disorder transition and in a thin-film geometry, our procedure enables an analytic calculation of distorted perpendicular and tilted lamellar phases in the presence of uniform or striped surface fields.
PACS: 36.20.-r – Macromolecules and polymer molecules / 68.55.-a – Thin film structure and morphology / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling
© EDP Sciences, 2001