Superhydrophobic (SHPB) surfaces with tunable adhesion have attracted substantial research interest due to their broad applications. Surface adhesion is a critical parameter that is used to determine the dynamics of water droplets, including liquid pining and releasing. In this study, a facile dewetting strategy is developed to finely tune adhesion on SHPB copper surfaces in a controllable manner. Using this approach, various liquid manipulation behaviors are demonstrated. Copper nanofiber textures (CNFTs) with different surface morphologies, including nanofiber array, bundled nanofibers, and hierarchical micro‐/nanocomposite structures facilitate different dewetting processes of the silicone oil solution via different capillary pathways, which lead to different localization of the silicone oil. Consequently, the CNFTs exhibit tunable adhesion ranging from 8.5 to 104.7 µN, while exhibiting superhydrophobicity. It is proposed that the continuity of the three‐phase contact line plays a crucial role in determining the surface adhesion, which varies from a continuous state on nanofiber array to a discontinuous state on micro‐/nanocomposite textures. Taking advantage, various droplet manipulation behaviors, such as the loss‐less transfer, stretchable deformation, and the directional droplet rolling, are demonstrated using CNFTs with different adhesion. It is envisioned that the proposed strategy will elucidate the fabrication of functional SHPB surfaces.

中文翻译：

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使用方便的可控去湿方法在超疏水铜表面上的可调节附着力

具有可调节粘合力的超疏水（SHPB）表面由于其广泛的应用而引起了广泛的研究兴趣。表面附着力是一个关键参数，用于确定水滴的动力学，包括液体的钉扎和释放。在这项研究中，开发了一种简便的去湿策略，以可控的方式微调SHPB铜表面上的附着力。使用这种方法，展示了各种液体操纵行为。具有不同表面形态的铜纳米纤维织构（CNFT），包括纳米纤维阵列，成束的纳米纤维和分层的微/纳米复合结构，通过不同的毛细管路径促进了硅油溶液的不同润湿过程，从而导致了硅油的不同定位。所以，CNFTs具有8.5至104.7 µN的可调粘合力，同时具有超疏水性。提出了三相接触线的连续性在决定表面附着力方面起着至关重要的作用，它从纳米纤维阵列上的连续状态变化到微/纳米复合材料结构上的不连续状态变化。利用具有不同粘附力的CNFT，证明了各种液滴操纵行为，例如无损转移，可拉伸变形和定向液滴滚动。可以预见，所提出的策略将阐明功能性SHPB表面的制造。从纳米纤维阵列上的连续状态变化到微米/纳米复合材料纹理上的不连续状态。利用具有不同粘附力的CNFT，证明了各种液滴操纵行为，例如无损转移，可拉伸变形和定向液滴滚动。可以预见，所提出的策略将阐明功能性SHPB表面的制造。从纳米纤维阵列上的连续状态变化到微米/纳米复合材料纹理上的不连续状态。利用具有不同粘附力的CNFT，证明了各种液滴操纵行为，例如无损转移，可拉伸变形和定向液滴滚动。可以预见，所提出的策略将阐明功能性SHPB表面的制造。