Surfaces with a very high water contact angle larger than 150° and a low contact angle hysteresis of less than 10° are generally known as superhydro -phobic surfaces. These surfaces have attracted much interest in industry, because many studies have shown that these surfaces have properties such as self-cleaning [1] and anti-corrosion [2]. A superhydro -phobic surface can be attained by forming a hierarchical roughness structure, that is, a nanometer-sized structure superimposed over a micrometer-structure, similar to those of the lotus leaf. Herein, we report uniformly superhydrophobic surface where nano-scale structures were fabricated by alkali surface modification method and self-assembled monolayer coating. And, we propose the fabrication process for dual-scale hierarchical structures combining both microstructure via sandblasting techniques and the nanostructured aluminum hydroxide layer to enhance mechanical durability of the superhydrophobicity.
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