biostudies-literatureUnknown28(2)Ma TInspired by the fog-collecting abilities of the Namib Desert beetle, researchers have developed wettability-engineered surfaces for fog collection. However, these approaches fall short in arid regions where fog is absent. To address these challenges, we developed a dual-sided structure based on radiative cooling. The radiation cooling material on the upper surface can achieve energy free cooling. The lower surface is a pattern with heterogeneous wettability, composed of wedge-shaped and conical structures, which can achieve rapid droplet accumulation and directional transport. The radiation cooling material adjusted by spectrum can achieve a temperature difference of up to 14.2°C, enabling the composite material to achieve a maximum water collection efficiency of 602.5 g·m^-2·h<siScience111746https://www.ebi.ac.uk/biostudies/studies/S-EPMC11795136biostudies-literatureEfficient radiative cooling based on spectral regulation and atmospheric water harvesting with sunflower design.PMC11795136Wu JDu XLiu SMa TfalseEfficient radiative cooling based on spectral regulation and atmospheric water harvesting with sunflower design.Inspired by the fog-collecting abilities of the Namib Desert beetle, researchers have developed wettability-engineered surfaces for fog collection. However, these approaches fall short in arid regions where fog is absent. To address these challenges, we developed a dual-sided structure based on radiative cooling. The radiation cooling material on the upper surface can achieve energy free cooling. The lower surface is a pattern with heterogeneous wettability, composed of wedge-shaped and conical structures, which can achieve rapid droplet accumulation and directional transport. The radiation cooling material adjusted by spectrum can achieve a temperature difference of up to 14.2°C, enabling the composite material to achieve a maximum water collection efficiency of 602.5 g·m^-2·h<s2025-01-01T00:00:00Z2025 Feb2025-04-04T07:26:15.32Z2025-04-04T07:26:15.32ZS-EPMC117951363991135210.1016/j.isci.2025.111746