Abstract As a widely existed phenomenon of the surface of natural organisms, anisotropic wetting arouses much attention for their wide applications in fields as liquid transportation, fog collection, microfluidic devices and oil-water separation. Here, we presented unidirectional water spreading on the surface of oblique polyimide (PI) nanowires (NWs) array and directional moving of water droplet on hydrophobically treated oblique PI NWs array. Directional water transportation and fog collection were realized using the oblique PI NWs array. As the NWs array could be easily fabricated on PI films with our method, it is beneficial for the applications.

中文翻译：

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斜纳米线阵列的各向异性润湿特性及其在输水和集雾中的应用

摘要 各向异性润湿作为一种广泛存在的自然生物体表面现象，在液体输送、集雾、微流控装置和油水分离等领域有着广泛的应用而备受关注。在这里，我们展示了在倾斜聚酰亚胺 (PI) 纳米线 (NWs) 阵列表面上的单向水扩散和在疏水处理的倾斜 PI NWs 阵列上水滴的定向移动。使用倾斜的PI NWs阵列实现了定向输水和雾气收集。由于使用我们的方法可以在 PI 薄膜上轻松制造 NW 阵列，因此有利于应用。