Influence of surface ordering on the wetting of structured liquids

R. Limary*, P. F. Green, K. R. Shull

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The substrate is shown to induce substantial ordering in diblock copolymer thin films above the bulk order-disorder transition (ODT) where, thermodynamically, a phase mixed state is favored. Initially, uniform films reorganize to form a hierarchy of transient surface patterns and stable film thicknesses that depend on the initial film thickness and on the substrate. Self-consistent field calculations of the free energy of the system for different situations, depending on the relative tendency for the different block components to be attracted to the substrate and/or free surface, provide an explanation of the formation of the stable film thicknesses. A continuum picture proposed earlier by Brochard et al. provides an explanation of the wetting characteristics of this system. In some cases the ordering destabilizes the film so that dewetting occurs (wetting autophobicity), whereas in other cases the surface ordering results in a kinetic stabilization of a film that would otherwise dewet.

Original languageEnglish (US)
Pages (from-to)103-110
Number of pages8
JournalEuropean Physical Journal E
Volume8
Issue number2
DOIs
StatePublished - May 2002

ASJC Scopus subject areas

  • General Chemistry
  • Biophysics
  • Biotechnology
  • General Materials Science
  • Surfaces and Interfaces

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