Macroscopic-wetting anisotropy on the line-patterned surface of fluoroalkylsilane monolayers

Masamichi Morita, Tomoyuki Koga, Hideyuki Otsuka, Atsushi Takahara

Research output: Contribution to journalArticle

196 Citations (Scopus)

Abstract

Micropatterned fluoroalkylsilane monolayer surfaces with liquidphilic/liquidphobic area (line width 1-20 μm) were prepared with few defects by vacuum ultraviolet (VUV) photolithography. The anisotropic wetting of a macroscopic droplet with a 0.5-5 mm diameter on the micropatterned surfaces was investigated. The strong anisotropy of the contact angle and the sliding angle and droplet distortion for fluoroalkylsilane/silanol patterned surfaces was attributed to the difference in the energy barrier of wetting between parallel and orthogonal lines. The wetting anisotropy decreased with decreases in the liquidphilic area. Fluoroalkylsilane/alkylsilane patterned surfaces with small differences in the surface free energies of the components showed anisotropic wetting only for the low-surface-tension liquids.

Original languageEnglish
Pages (from-to)911-918
Number of pages8
JournalLangmuir
Volume21
Issue number3
DOIs
Publication statusPublished - Feb 1 2005

All Science Journal Classification (ASJC) codes

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

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