Active manipulation of liquid spreading behaviors on solid surface is important due to various applications in artificial fluid-transport and liquid harvesting systems. Generally, super-spreading property can be achieved by constructing micro/nanoscale structures on hydrophilic surface on the basis of the structure induced capillary force, however it hardly proceeds on hydrophobic surface in controllable manner. Herein, based on the laser induced “double modification” of surface morphology and chemical composition, we fabricate V-shape microgrooves on hydrophobic solid surface with different depth-to-width (D/W) aspect ratios, on which liquid can be either super-spreading (SS) or non-spreading (NS) depending on the D/W ratio of microgrooves. Experimental results demonstrate that water droplet can hardly spread on the grooved surface when D/W ratio is lower than 0.6, while exhibit super-spreading property on the surface when D/W ratio is higher than 0.7. In the process of water spreading in SS microgrooves, water flow dynamics are found to satisfy $z\left(t\right)\sim t^{1/2}$, $z\left(t\right)\sim t^{1/2}+t$ and exponential functions successively when taking gravity effect into consideration. Active manipulation of water behaviors is achieved by combining SS and NS microgrooves, where water rapidly propagates along SS microgrooves and immediately stops when it reaches NS ones. This study provides a facile method for realizing active and spontaneous manipulation of water spreading behaviors on demand.

由于在人工流体传输和液体收集系统中的各种应用，在固体表面上主动操纵液体扩散行为很重要。通常，基于结构诱导的毛细管力在亲水表面构建微/纳米级结构可以实现超扩展性能，但在疏水表面很难以可控的方式进行。在此，基于激光诱导表面形貌和化学成分的“双重改性”，我们在具有不同深宽比（D/W）纵横比的疏水固体表面上制造了 V 形微槽，在该微槽上液体可以是超- 扩展 (SS) 或非扩展 (NS) 取决于微槽的 D/W 比。实验结果表明，当D/W比低于0.6时，水滴几乎不能在凹槽表面扩散，而当D/W比高于0.7时，水滴在表面上表现出超扩散性。在 SS 微槽中的水扩散过程中，发现水流动力学满足$z\left(吨\right)～{吨}^{1/2}$, $z\left(吨\right)～{吨}^{1/2}+吨$和指数函数在考虑重力效应时依次进行。水行为的主动操纵是通过结合 SS 和 NS 微槽来实现的，其中水沿着 SS 微槽快速传播，并在到达 NS 微槽时立即停止。该研究为实现按需主动和自发地操纵洒水行为提供了一种简便的方法。