We examine the hydrophobic and hydrophilic properties of the plane and curved surfaces of different materials ablated using 5 ns laser pulses in air. The difference in the contact angles between liquid and surface of the modified graphite and AlNiCo alloy rods using different fluencies of the ablating pulses are demonstrated. The wetting contact angle of ablated graphite rod was found to be 147°, i.e., the modified curved surfaces demonstrated the superhydrophobic properties. On the other hand, the superhydrophilic properties, with 7° wetting contact angle, were demonstrated in the case of ablated aluminum alloy. A schematic model was proposed for the application of the graphite rod as a membrane for the oil–water separation.

中文翻译：

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激光烧蚀平面和曲面的超疏水和超亲水特性

我们检查了在空气中使用 5 ns 激光脉冲烧蚀的不同材料的平面和曲面的疏水性和亲水性。证明了使用不同的烧蚀脉冲通量的改性石墨和 AlNiCo 合金棒的液体和表面之间的接触角的差异。发现烧蚀石墨棒的润湿接触角为 147°，即改性曲面表现出超疏水特性。另一方面，在烧蚀铝合金的情况下证明了具有 7° 润湿接触角的超亲水特性。提出了将石墨棒用作油水分离膜的示意图模型。