Abstract：
White Roman goose (Anser anser domesticus) feathers, comprised of oriented conical barbules, are coated with gland-secreted preening oils to maintain a long-term nonwetting performance for surface swimming. The geese are accustomed to combing their plumages with flat bills in case they are contaminated with oleophilic substances, during which the amphiphilic saliva spread over the barbules greatly impairs their surface hydrophobicities and allows the trapped contaminants to be anisotropically self-cleaned by water flows. Particularly, the superhydrophobic behaviors of the goose feathers are recovered as well. Bioinspired by the switchable anisotropic self-cleaning functionality of white Roman geese, superhydrophobic unidirectionally inclined conical structures are engineered through the integration of a scalable colloidal self-assembly technology and a colloidal lithographic approach. The dependence of directional sliding properties on the shape, inclination angle, and size of conical structures is systematically investigated in this research. Moreover, their switchable anisotropic self-cleaning functionalities are demonstrated by Sudan blue II/water (0.01%) separation performances. The white Roman goose feather-inspired coatings undoubtedly offer a new concept for developing innovative applications that require directional transportation and the collection of liquids.
摘要：
白色罗马鹅（Anseranserdomesticus）的羽毛，由定向的圆锥形小球组成，涂有腺体分泌的精制油，以保持表面游泳的长期非润湿性能。鹅习惯于用扁平的钞票梳理羽毛，以防它们被亲油性物质污染，在此期间，两亲性唾液在barbulles上扩散，极大地损害了它们的表面疏水性，并允许被捕获的污染物通过水流各向异性地自我清洁。特别是,鹅羽毛的超疏水行为也得到了恢复。生物灵感来自白色罗马鹅的可切换各向异性自清洁功能，超疏水单向倾斜锥形结构是通过整合可扩展的胶体自组装技术和胶体光刻方法来设计的。方向滑动特性对形状的依赖性，倾角,本研究系统地研究了圆锥形结构的尺寸。此外，苏丹蓝II/水（0.01％）的分离性能证明了它们可切换的各向异性自清洁功能。白色罗马鹅羽毛风格的涂料无疑为开发需要定向运输和液体收集的创新应用提供了新概念。
