There has been substantial recent interest with respect to the broad potential applications of superomniphobic surfaces, but it remains enormously challenging to enhance the dynamic stability of such surfaces impacted by high-pressured droplets. Herein, a robust superomniphobic surface with dual-scale re-entrant structures (DRSs) has been designed and fabricated through a facile combination of magnetic particle-assisted self-assembly and a dip-coating technique. Compared to superomniphobic surfaces with single-scale re-entrant structures, this superomniphobic surface with DRSs shows highly improved repellency against the impact from different high-pressured droplets, a property which is furnished by the extension of three-phase contact lines, the increase in local geometric angles, and the formation of additional air pockets. Furthermore, the superomniphobic surface can serve as a platform to well maintain lubricating fluid so as to realize a photoresponsive slippery surface wherein near-infrared light can be used to manipulate various liquid droplets with a large range of volumes. Overall, this study provides a strategy for obtaining the robust superomniphobic and photoresponsive slippery surfaces through the DRS design, which provides a new insight into enhancing the dynamic stability of superomniphobic surfaces and also demonstrates the application of slippery surfaces for droplet manipulation.

近来，人们对超疏水性表面的广泛潜在应用产生了浓厚的兴趣，但是要增强受高压液滴影响的此类表面的动态稳定性，仍然存在巨大挑战。在本文中，通过磁性粒子辅助自组装和浸涂技术的简便组合，设计并制造了具有双尺度凹角结构（DRS）的坚固的超憎水表面。与具有单尺度折返结构的超憎水表面相比，这种具有DRS的超憎水表面在抵抗不同高压液滴的冲击方面表现出了更高的排斥性，这种特性是通过延长三相接触线，增加局部几何角度，并形成额外的气穴。此外，超疏油性表面可作为良好保持润滑液的平台，从而实现光响应性光滑表面，其中近红外光可用于处理大体积范围内的各种液滴。总的来说，这项研究提供了一种通过DRS设计获得坚固的超疏油性和光响应性光滑表面的策略，这为增强超疏油性表面的动态稳定性提供了新的见识，并且还演示了光滑表面在液滴操纵中的应用。