Diblock copolymer ordering induced by patterned surfaces

Details Diblock copolymer ordering induced by patterned surfaces Diblock copolymer ordering induced by patterned surfaces

2000-07-04

arxiv.org/abs/cond-mat/0007056v3

Europhys. Lett. 53, 722 (2001)

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 3 figures, to be published in Europhys. Lett

Scientific paper

10.1209/epl/i2001-00211-3

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 point and in a thin-film geometry, our procedure enables the analytic calculation of distorted perpendicular and tilted lamellar phases in the presence of uniform or modulated surface fields.

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