Directional oil sliding surfaces with hierarchical anisotropic groove microstructures

Seong Min Kang, Chanseok Lee, Hong Nam Kim, Byung Jun Lee, Ji Eun Lee, Moon Kyu Kwak, Kahp Yang Suh

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

A robust directional oil sliding surface is presented by utilizing re-entrant micro-groove arrays inspired from the microgrooves of rice leaf. The overhang micro-groove arrays are shown to provide two primary goals of "omniphobicty" and "anisotropic sliding" with DI water (γlv = 72.1 mN/m) as well as mineral oil (γlv = 28 mN/m) and conventional photoresist.

Original languageEnglish
Pages (from-to)5756-5761
Number of pages6
JournalAdvanced Materials
Volume25
Issue number40
DOIs
StatePublished - Oct 2013

Keywords

  • anisotropic wetting
  • oil sliding surfaces
  • overhang structures
  • rice leaf

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