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首页> 外文期刊>Nanotechnology >Modifying the anti-wetting property of butterfly wings and water strider legs by atomic layer deposition coating: surface materials versus geometry
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Modifying the anti-wetting property of butterfly wings and water strider legs by atomic layer deposition coating: surface materials versus geometry

机译：通过原子层沉积涂层改善蝶形翼和水ider腿的抗湿性：表面材料与几何形状

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Although butterfly wings and water strider legs have an anti-wetting property, their working conditions are quite different. Water striders, for example, live in a wet environment and their legs need to support their weight and bear the high pressure during motion. In this work, we have focused on the importance of the surface geometrical structures in determining their performance. We have applied an atomic layer deposition technique to coat the surfaces of both butterfly wings and water strider legs with a uniform 30 nm thick hydrophilic Al2O3 film. By keeping the surface material the same, we have studied the effect of different surface roughness/structure on their hydrophobic property. After the surface coating, the butterfly wings changed to become hydrophilic, while the water strider legs still remained super-hydrophobic. We suggest that the super-hydrophobic property of the water strider is due to the special shape of the long inclining spindly cone-shaped setae at the surface. The roughness in the surface can enhance the natural tendency to be hydrophobic or hydrophilic, while the roughness in the normal direction of the surface is favorable for forming a composite interface.
机译：尽管蝴蝶的机翼和水跨腿具有防潮性能，但它们的工作条件却大不相同。例如，水str生活在潮湿的环境中，它们的腿需要支撑自己的体重并在运动过程中承受高压。在这项工作中，我们集中于表面几何结构在确定其性能方面的重要性。我们已经应用了原子层沉积技术，以均匀的30 nm厚的亲水性Al2O3膜涂覆蝶形翼和水ider腿的表面。通过保持表面材料相同，我们研究了不同表面粗糙度/结构对其疏水性的影响。表面涂层后，蝴蝶的翅膀变为亲水性，而水ider腿仍然保持超疏水性。我们建议水str的超疏水特性是由于其表面上长斜刺的锥形刚毛的特殊形状。表面的粗糙度可以增强自然的疏水性或亲水性趋势，而表面法线方向的粗糙度有利于形成复合界面。

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