In the present study, we report a novel oil-triggered surface (OTS) by integrating three extreme states of hydrophobicity, i.e., ‘lotus-leaf-like’ superhydrophobicity, ‘nepenthes-like’ slippery liquid-infused surface hydrophobicity and ‘re-entrant-structure-induced’ superamphiphobicity. The OTS is fabricated by an ultra-fast laser based technology through creating alternating gas/oil infused superhydrophobic–superoleophilic micro-nanostructures among superamphiphobic micro-nanostructures. We demonstrate that the precisely arrayed superhydrophobic–superoleophilic micro-nanostructures can be reversely switched quickly to be in a ‘lotus-leaf-like’ gas-infused or ‘nepenthes-like’ oil-infused state through an oil-triggered method. The test droplets can slide with freedom on gas-infused superhydrophobic–superoleophilic patterns while they will be confined, guided or self-driven by oil-infused ones. Especially, the droplets can move along oil-infused patterns with a high mobility, but without pinning, liquid loss or cross contamination. The surfaces are further used as droplet-manipulation chips to attest real-time operating ability, on which the test droplets can be selectively ‘trapped’, ‘guided’, ‘directed’, ‘pumpless-moved’, ‘pumpless-dragged’, ‘pumpless-pulled’ and ‘pumpless-pushed’ in real time through the remote control of the oil-triggered method. In addition, our OTSs manifest a remarkable long-time stability of >80 days and cycle-to-cycle stability of >10 cycles. With multiple functions and various superior abilities, the OTSs have expansive application prospects. Especially, the oil-triggered strategy and laser-based technology proposed here may aid the development of various fields related to liquid manipulation and smart switchable surfaces.

中文翻译：

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交替注入空气/润滑剂的超疏油性表面上油触发的可切换润湿性

在本研究中，我们通过整合疏水性的三个极端状态（即，，“荷叶样”超疏水性，“猪笼草样”光滑液体注入的表面疏水性和“凹腔结构诱导的”超疏水性。OTS是通过基于超快激光的技术通过在超疏水性微纳米结构之间创建交替注入气体/油的超疏水性-超亲油性微纳米结构而制造的。我们证明了精确排列的超疏水性-超亲油性微纳米结构可以通过油触发方法快速反向转换为“荷叶样”气体注入或“猪笼草状”油注入状态。测试液滴可以在注入气体的超疏水-超亲油性图案上自由滑动，而受注入液滴的限制，引导或自驱动。特别，液滴可以以高流动性沿注油模式移动，但不会发生钉扎，液体流失或交叉污染的情况。这些表面还用作液滴操纵芯片，以检验实时操作能力，在其上可以选择性地“捕获”，“引导”，“定向”，“无泵移动”，“无泵拖曳”，通过石油触发方法的远程控制，实时“无泵拉动”和“无泵冲动”。此外，我们的OTS表现出显着的> 80天的长时间稳定性和大于10个周期的逐周期稳定性。OTS具有多种功能和各种优越的功能，具有广阔的应用前景。特别，