Abstract: The global distribution of freshwater resources is highly uneven. Addressing global water scarcity requires innovative water harvesting technologies. As a promising complementary strategy, fog harvesting can effectively alleviate this problem. The performance of conventional one/two-dimensional fog collectors is highly susceptible to wind direction due to their lack of adaptive adjustment mechanisms for shifting winds. To tackle this limitation, this work presents a facile strategy for fabricating high-performance and three-dimensional fog collectors inspired by the hierarchical structure of burdock flowers and the mechanics of dynamic paper-cut structures. The design features a hollow, rotatable, and foldable aluminum structure fabricated via laser etching. This structure is functionalized with a Slippery Liquid-Infused Porous Surface (SLIPS) through the infusion of a silicone oil and paraffin wax mixture to facilitate efficient droplet capture and rapid shedding. The resulting collector demonstrates an exceptional fog collection rate of 0.2514 g·cm-2·min-1 and outstanding excellent cycle stability. This work offers an approach of designing scalable and efficient 3D fog collectors, which adapts to varying wind directions to achieve omnidirectional fog capture. Moreover, it offers a compelling combination of low cost, light weight, and compact storability, presenting a promising and sustainable solution to water scarcity in arid, freshwater-limited regions.

Key words: Biomimetic structures')">Biomimetic structures, SLIPS, Burdock flower, 3D rotation structure, Fog collection