Nanostructure-Dependent Water-Droplet Adhesiveness Change in Superhydrophobic Anodic Aluminum Oxide Surfaces: From Highly Adhesive to Self-Cleanable

• DOI: 10.1021/la904095x
• Publication Date: 2009-12-29T15:27:49Z
• Authors: Wonbae Lee; Bo Gi Park; Dae Hyun Kim; Dong Jun Ahn; Yongdoo Park; Sang Hoon Lee; Kyu Back Lee
• Keywords: Anodizing; Nanopillar; Nanopore; Hysteresis; Lotus effect; Anodic Aluminum Oxide

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 structure nanopore nanopillar arrays at surface caused dramatic increase in receding angle and decrease hysteresis water contact angles. The presence dead-end nanopores but not through nanoholes recognized as one main causes surfaces. adhesiveness-controllable AAO can be an excellent which elucidate physical nature wetting phenomenon related nanostructure has promising potential technological applications.