Solid surfaces with improved wettability as well as geometric structures can enhance capture and droplet removal, thereby improving fog harvesting. We fabricated Al wires by combining superhydrophilic (SHL), superhydrophobic (SHB), and oil-infused SHB (SHBO) surfaces into a pattern whose fog-harvesting efficiency could be measured. The SHL-SHBO-SHL pattern showed the highest promise of water droplet capture and mobility on a solid surface with 42% efficiency compared to the 34% efficiency of Bare. In order to identify the optimal efficiency features, two boundary conditions (boundary I: from SHL to SHBO and boundary II: from SHBO to SHL) were introduced, and the impact of the hydrophilic area was examined. Boundary I boosts capture efficiency whereas boundary II increases drain efficiency. Understanding the forces operating at the wettability gradient surface, as well as incorporating the area ratio of SHL and SHBO via wettability combinations, are key to designing effective fog harvesting systems.

具有改善的润湿性以及几何结构的固体表面可以增强捕获和液滴去除，从而改善雾气收集。我们通过将超亲水 (SHL)、超疏水 (SHB) 和注油 SHB (SHBO) 表面组合成可以测量雾收集效率的图案来制造铝线。SHL-SHBO-SHL 模式在固体表面上表现出最高的水滴捕获和流动性，效率为 42%，而 Bare 的效率为 34%。为了确定最佳效率特征，引入了两个边界条件（边界I：从SHL到SHBO和边界II：从SHBO到SHL），并检查了亲水区域的影响。边界 I 提高捕获效率，而边界 II 提高排水效率。了解润湿性梯度表面的作用力，以及通过润湿性组合纳入 SHL 和 SHBO 的面积比，是设计有效的雾收集系统的关键。