As scarcity of water is expected to intensify with global warming, unconventional water sources such as advective fogs may become essential. In numerous arid regions, nets are used to harvest such water droplets. However, many current fog nets are either not durable or expensive, and have poor performances for short time or low intensity fog events. With a dedicated test bench, we show here that a low-cost net with kirigami design offers a higher and faster fog collecting ability than the usual fibers nets. This kirigami fog net consists of a continuous network of strips where water quickly forms a stable film, accounting for its superior capture efficiency. We rationalize this mechanism with a simplified structure composed of disconnected strips whose optimization paves the way to the shaping of original fog nets such as the kirigami one.

随着全球变暖，水资源短缺预计将加剧，平流雾等非常规水源可能变得至关重要。在许多干旱地区，人们使用网来收集此类水滴。然而，目前的许多防雾网要么不耐用，要么价格昂贵，并且对于短时间或低强度的雾事件性能较差。通过专用的测试台，我们在这里展示了采用剪纸设计的低成本网比普通纤维网具有更高、更快的集雾能力。这种剪纸雾网由连续的条带网络组成，水可以快速形成稳定的薄膜，从而具有卓越的捕集效率。我们通过由断开的条带组成的简化结构合理化了这一机制，其优化为原始雾网（例如剪纸雾网）的成型铺平了道路。