Rupture of thin films with resonant substrate patterning

Justin C.T. Kao, Alexander A. Golovin, Stephen H. Davis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

We study the stability and rupture of thin liquid films on patterned substrates. It is shown that striped patterning on a length scale comparable to that of the spinodal instability leads to a resonance effect and an imperfect bifurcation of equilibrium film shapes. Weakly nonlinear analysis gives predictions for film shapes, stability, growth rates, and rupture times, which are confirmed by numerical solution of the thin-film equation. Film behavior is qualitatively different in the resonant patterning regime, but with sufficiently large domains rupture occurs on a spinodal length scale regardless of patterning. Instabilities transverse to the patterning are examined and shown to behave similarly as disturbances to films on uniform substrates. We explain some previously reported effects in terms of the imperfect bifurcation.

Original languageEnglish (US)
Pages (from-to)532-545
Number of pages14
JournalJournal of Colloid And Interface Science
Volume303
Issue number2
DOIs
StatePublished - Nov 15 2006

Keywords

  • Dewetting
  • Imperfect bifurcation
  • Nonlinear dynamics
  • Patterning
  • Rupture
  • Templating
  • Thin liquid films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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