Surface-tension-confined microfluidic devices are platforms for manipulating 2D droplets based on patterned surfaces with special wettability. They have great potential for various applications, but are still in the early stages of development and face some challenges that need to be addressed. This study, inspired by the Wenzel and slippery transition of rose petal, develops a Patterned Oil-triggered Wenzel-slippery Surface (POWS) to examine the microfluidic devices. A laser-chemical composite method is established to fabricate POWSs, which take rose-petal-like microstructures as wettability pattern and a superamphiphobic surface as the background. The prepared POWSs switched between high adhesion superhydrophobic state and the slippery liquid-infused surface state through adding or removing the lubricant oil. In the high adhesion superhydrophobic state, the droplets can be sticked on the surface. In the slippery liquid-infused state, the droplet can slide along the wettability pattern as the designed route. A POWS-based droplet reactor is further constructed, on which, the droplets can be remotely controlled to move, mix and react, as required. Such a POWS, which manipulates droplets with surface tension controlled by the switchable wettability patterns, would be a promising candidate to construct multiple surface-tension-confined microfluidic devices. In addition, the fabrication technique and design principle proposed here may aid the development of various field related to the bio-inspired surfaces, such as water collection, desalination and high throughput analysis, etc.

表面张力限制微流体装置是基于具有特殊润湿性的图案化表面来操纵二维液滴的平台。它们在各种应用中具有巨大的潜力，但仍处于开发的早期阶段，并面临一些需要解决的挑战。这项研究受到 Wenzel 和玫瑰花瓣滑移转变的启发，开发了一种图案化油触发 Wenzel 滑移表面 (POWS) 来检查微流体装置。建立了一种激光化学复合方法来制造 POWS，其以玫瑰花瓣状微结构作为润湿性图案，以超双疏表面为背景。通过添加或去除润滑油，制备的POWS在高附着力超疏水状态和光滑的液体注入表面状态之间切换。在高附着力的超疏水状态下，液滴可以粘附在表面上。在光滑的液体注入状态下，液滴可以按照设计的路线沿着润湿性图案滑动。进一步构建了基于POWS的液滴反应器，在该反应器上，可以远程控制液滴根据需要移动、混合和反应。这种 POWS 可以通过可切换的润湿性模式控制表面张力来操纵液滴，将是构建多个表面张力限制微流体装置的有希望的候选者。此外，这里提出的制造技术和设计原理可能有助于与仿生表面相关的各个领域的发展，例如水收集、海水淡化和高通量分析等。