Dependence of macroscopic wetting on nanoscopic surface textures

Tak Sing Wong, Chih Ming Ho

Research output: Contribution to journalArticle

67 Scopus citations

Abstract

The hydrophobicity of a surface can be enhanced by physical textures. However, no existing theories of surface wetting can provide guidance to pinpoint the texture size requirement to achieve super/ultrahydrophobicity. Here, we show that the three-phase contact line tension, r, is an important link to understand the dependence of macroscopic wetting on physical texture size in an ideal Cassie regime. Specifically, we show that texture size is the dominant parameter in determining surface hydrophobicity when the size approaches a limiting physical length scale, as defined by T and the surface tension of the liquid.

Original languageEnglish (US)
Pages (from-to)12851-12854
Number of pages4
JournalLangmuir
Volume25
Issue number22
DOIs
StatePublished - Nov 17 2009

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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