First-order wetting transition at finite contact angle

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9 Citations (Scopus)

Abstract

The wetting of a polymer brush by a melt of similar chains can have a window of complete wetting with a classical allophobic wetting transition at low grafting density ¿ and an autophobic one at high ¿. However, when the melt chains are much longer than the brush chains, the contact angle ¿ goes through a nonzero minimum where ¿¿/¿¿ has a jump. A self-consistent-field analysis and experimental observations indicate a double-well disjoining pressure curve, consistent with a first-order wetting transition at finite ¿. The metastable contact angle can become zero.
Original languageEnglish
Pages (from-to)051801/1-051801/5
JournalPhysical Review. E, Statistical nonlinear, and soft matter physics
Volume66
DOIs
Publication statusPublished - 2002

Keywords

  • thin liquid-films
  • polymer brush
  • pattern-formation
  • grafted polymers
  • interface
  • homopolymer
  • layer

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