Phase Behavior in Thin Films of Cylinder-Forming Block Copolymers

A. Knoll; A. Horvat; K. S. Lyakhova; G. Krausch; G. J. A. Sevink; A. V. Zvelindovsky; R. Magerle

doi:10.1103/PhysRevLett.89.035501

Phase Behavior in Thin Films of Cylinder-Forming Block Copolymers

A. Knoll, A. Horvat, K. S. Lyakhova, G. Krausch, G. J. A. Sevink, A. V. Zvelindovsky, and R. Magerle

Phys. Rev. Lett. 89, 035501 – Published 27 June 2002

Abstract

We have experimentally determined a phase diagram for cylinder-forming polystyrene-block-polybutadien-block-polystyrene triblock copolymer in thin films. The phase behavior can be modeled in great detail by dynamic density functional theory. Deviations from the bulk structure, such as wetting layer, perforated lamella, and lamella, are identified as surface reconstructions. Their stability regions are determined by an interplay between surface fields and confinement effects.

Received 4 September 2001

DOI:https://doi.org/10.1103/PhysRevLett.89.035501

Authors & Affiliations

A. Knoll¹, A. Horvat¹, K. S. Lyakhova², G. Krausch¹, G. J. A. Sevink², A. V. Zvelindovsky², and R. Magerle^1,*

¹Physikalische Chemie II, Universität Bayreuth, D-95440 Bayreuth, Germany
²Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands