Dynamics of Terrace Formation in a Nanostructured Thin Block Copolymer Film
- 20 May 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 22 (13), 5848-5855
- https://doi.org/10.1021/la060265c
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.Keywords
This publication has 28 references indexed in Scilit:
- Role of dissimilar interfaces in thin films of cylinder-forming block copolymersThe Journal of Chemical Physics, 2004
- Phase behavior in thin films of cylinder-forming ABA block copolymers: ExperimentsThe Journal of Chemical Physics, 2004
- Structure of minimum thickness and terraced free-standing films of block copolymersJournal of Polymer Science Part B: Polymer Physics, 1996
- Ordering Phenomena in Thin Block Copolymer Films Studied Using Atomic Force MicroscopyMacromolecules, 1995
- Dynamic density functional theory for microphase separation kinetics of block copolymer meltsThe Journal of Chemical Physics, 1993
- Free surfaces of polymer blends. I. Theoretical framework and application to symmetric polymer blendsThe Journal of Chemical Physics, 1993
- Segment density distribution of symmetric diblock copolymers at the interface between two homopolymers as revealed by neutron reflectivityMacromolecules, 1991
- Characteristics of the surface-induced orientation for symmetric diblock PS/PMMA copolymersMacromolecules, 1989
- Variable-density model of polymer melt surfaces: structure and surface tensionMacromolecules, 1989
- Surface-induced orientation of symmetric, diblock copolymers: a secondary ion mass-spectrometry studyMacromolecules, 1989