Dynamics of terrace formation in a nanostructured thin block copolymer film

Lyakhova, K. S. and Horvat, A. and Zvelindovsky, Andrei and Sevink, G. J. A. (2006) Dynamics of terrace formation in a nanostructured thin block copolymer film. Langmuir, 22 (13). pp. 5848-5855. ISSN 0743-7463

Full content URL: http://pubs.acs.org/doi/abs/10.1021/la060265c

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Dynamics of terrace formation in a nanostructured thin block copolymer film

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Abstract

We have used dynamic self-consistent field (DSCF) theory to investigate the structural evolution of an ABA block copolymer thin film placed between a solid substrate and a free surface. In line with the few existing theoretical studies for pure homopolymers and mixtures, the free interface is introduced by a void component. In our calculations, the free surface experiences surface roughening and eventually the formation of terraces, as in the experiments. The kinetic pathway of the microstructures was compared to findings of an existing detailed experimental study (Knoll, A.; Lyakhova, K. S.; Horvat, A.; Krausch, G.; Sevink, G. J. A.; Zvelindovsky, A. V.; Magerle, R. Nat. Mater. 2004, 3, 886) and was found to be equivalent in detail. This corroborates our assumption in this earlier work that the pathway due to changing film thickness is similar to a pathway due to changing surface energetics. Moreover, our calculations show for the first time that microstructural transitions are a driving force of polymer/air interface curving and the formation of terraces. © 2006 American Chemical Society.

Keywords:Block copolymers, Interfaces (materials), Microstructure, Nanostructured materials, Surface roughness, Thin films, Interface curving, Structural evolution, Surface energetics, Surface roughening, Plastic films
Subjects:F Physical Sciences > F162 Polymer Chemistry
Divisions:College of Science > School of Mathematics and Physics
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ID Code:14977
Deposited On:23 Sep 2014 09:32

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