title: Directional oil sliding surfaces with hierarchical anisotropic groove microstructures.
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.
authors.affiliation: Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea.
authors.forename: Seong Min
authors.initials: SM
authors.lastname: Kang
authors.forename: Chanseok
authors.initials: C
authors.lastname: Lee
authors.forename: Hong Nam
authors.initials: HN
authors.lastname: Kim
authors.forename: Byung Jun
authors.initials: BJ
authors.lastname: Lee
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Moon Kyu
authors.initials: MK
authors.lastname: Kwak
authors.forename: Kahp-Yang
authors.initials: KY
authors.lastname: Suh
keywords: anisotropic wetting; oil sliding surfaces; overhang structures; rice leaf