Dual-scale roughness produces unusually water-repellent surfaces

N. J. Shirtcliffe, G. McHale, M. I. Newton, G. Chabrol, C. C. Perry

Research output: Contribution to journalArticlepeer-review

Abstract

Super-hydrophobicity can be achieved on relatively smooth surfaces. Short, wide pillars on slightly rough surfaces are shown to produce super-hydrophobic surfaces (see Figure) where neither the pillars nor the slight roughness suffice alone. This use of two length scales to create super-hydrophobic surfaces directly mimics the mechanism used by some plants including the lotus.
Original languageEnglish
Pages (from-to)1929-1932
Number of pages4
JournalAdvanced Materials
Volume16
Issue number21
DOIs
Publication statusPublished - 4 Nov 2004

Keywords

  • superhydrophobic
  • contact angle
  • wetting
  • Cassie
  • Wenzel
  • roughness

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