Dynamic dewetting through micropancake growth

James Richard Thorley Seddon, O. Bliznyuk, Olesya Bliznyuk, Ernst S. Kooij, Bene Poelsema, Henricus J.W. Zandvliet, Detlef Lohse

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)

Abstract

We experimentally investigate the dynamics of nanometer-high, micrometer-wide gassy layers at the interface between a hydrophobic solid and bulk water. These micropancakes grow laterally in time, on the timescale of an hour, leading to partial dewetting of the solid. The growth is directional, mediated by chemical roughness on the substrate, and transient, occurring within the first hour after liquid deposition. We use circularity to measure the roundness of a micropancake (circularity C = 2(πA)1/2/L, where A is the surface area and L is the perimeter). The growth is anisotropic, as demonstrated by a decrease in circularity with time. However, once a micropancake reaches size saturation, its bulk rearranges its shape in order to minimize the length of its three-phase line. We interpret this combination of growth followed by bulk rearrangement as dynamic dewetting.
Original languageUndefined
Pages (from-to)9640-9644
Number of pages5
JournalLangmuir
Volume26
Issue number12
DOIs
Publication statusPublished - 2010

Keywords

  • EC Grant Agreement nr.: FP7/235873
  • IR-72811
  • METIS-266596

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