Comprehensively durable superhydrophobic metallic hierarchical surfaces via tunable micro-cone design to protect functional nanostructures

摘要: Superhydrophobic surfaces have been intensively investigated in recent years. However, their durability remains a major challenge before superhydrophobic can be employed practice. Although various works focused on overcoming this bottleneck, no single surface has ever able to achieve the comprehensive (including tangential abrasion durability, dynamic impact and adhesive durability) required by stringent industrial requirements. Within hierarchical structures developed for superhydrophobicity typical plants or animals natural evolution, microstructures usually provide mechanical stability, strength flexibility protect functional nanostructures enable high durability. mechanism achieving is rarely studied reported. We an ultrafast laser fabricate micro/nanohierarchical metal with tunable micro-cones produced abundant nanostructures. then systematically fully utilizing protective effect of via design micro-cones. confirm that height spatial period were crucial respectively. finally fabricated optimized tungsten surfaces, which could withstand 70 cycles, 28 min solid particle 500 tape peeling cycles retain contact angles greater than 150° sliding less 20°, demonstrated exceptional The particular are among best published results. This research clarifies whereby effectively protected promising improving thus practical applications.