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Europhys. Lett., 53 (6), pp. 722728 (2001) EUROPHYSICS LETTERS 15 March 2001
 

Summary: Europhys. Lett., 53 (6), pp. 722728 (2001)
EUROPHYSICS LETTERS 15 March 2001
Diblock copolymer ordering induced by patterned surfaces
Y. Tsori and D. Andelman
School of Physics and Astronomy
Raymond and Beverly Sackler Faculty of Exact Sciences
Tel Aviv University - 69978 Ramat Aviv, Israel
(received 20 June 2000; accepted in final form 12 January 2001)
PACS. 36.20.-r Macromolecules and polymer molecules.
PACS. 68.55.-a Thin film structure and morphology.
PACS. 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling.
Abstract. We use a Ginzburg-Landau free-energy functional to investigate diblock copoly-
mer 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 sur-
face 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 dis-
torted perpendicular and tilted lamellar phases in the presence of uniform or striped surface
fields.

  

Source: Andelman, David - School of Physics and Astronomy, Tel Aviv University

 

Collections: Materials Science; Physics