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 oil it 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 nanoholes through nanoholes was recognized as one of the main causes of the adhesiveness of superhydrophobic surfaces. The adhesiveness-controllable superhydrophobic AAO call be all excellent platform oil which to elucidate the physical nature of the wetting phenomenon related to the nanostructure and has promising potential in technological applications.