title: Nanostructure-dependent water-droplet adhesiveness change in superhydrophobic anodic aluminum oxide surfaces: from highly adhesive to self-cleanable.
abstract: Water-droplet adhesiveness was freely controlled on a single platform of superhydrophobic anodized aluminum oxide (AAO) within the range from highly adhesive to self-cleanable. Changing the structure from nanopore to nanopillar arrays at the surface caused a dramatic increase in the receding angle and a decrease in the hysteresis of water contact angles. The presence of dead-end nanopores but not through nanoholes was recognized as one of the main causes of the adhesiveness of superhydrophobic surfaces. The adhesiveness-controllable superhydrophobic AAO can be an excellent platform on which to elucidate the physical nature of the wetting phenomenon related to the nanostructure and has promising potential in technological applications.
authors.affiliation: Department of Biomedical Engineering, College of Health Science, Korea University San 1, Jeongneung-3-dong, Seongbuk-gu, Seoul 136-703, Korea.
authors.forename: Wonbae
authors.initials: W
authors.lastname: Lee
authors.forename: Bo Gi
authors.initials: BG
authors.lastname: Park
authors.forename: Dae Hyun
authors.initials: DH
authors.lastname: Kim
authors.forename: Dong Jun
authors.initials: DJ
authors.lastname: Ahn
authors.forename: Yongdoo
authors.initials: Y
authors.lastname: Park
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Lee
authors.forename: Kyu Back
authors.initials: KB
authors.lastname: Lee
mesh_terms: D000268:Adhesiveness; D000537:Aluminum Oxide / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry*; D016062:Porosity; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D000537:Aluminum Oxide