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首页> 外文期刊>Applied Surface Science >Ultrafast fiber laser-induced fabrication of superhydrophobic and self-cleaning metal surfaces
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Ultrafast fiber laser-induced fabrication of superhydrophobic and self-cleaning metal surfaces

机译：超快纤维激光诱导的超疏水和自清洁金属表面的制备

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摘要

Wetting properties of metal surfaces play important role in different practical and fundamental applications. In this work we investigate the variation of wetting properties of three different metals (aluminum, copper and galvanized steel) when ablated with ultrafast fiber lasers of femtosecond and picosecond pulse durations. The role of pulse duration and scanning speed used in the laser-surface structuring is analyzed. Scanning electron microscopy, atomic force microscopy, and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) are employed to characterize the roughness and chemistry of the laser-structured surfaces. The degree of hydrophobicity and self-cleaning characteristics of three laser-structured metals are compared when aged in different post-ablation environments. Freshly laser-treated samples of aluminum, copper, and galvanized steel demonstrated superhydrophilic wetting response when their contact angles are measured immediately after laser ablation. The superhydrophilic characteristics of these freshly laser-structured surfaces are found to evolve to hydrophobic state after 30 days of ageing in ambient atmospheric conditions, while they take only 6 h to transform to superhydrophobic state when aged in low-pressure environment. Ultrafast laser-surface nanostructuring, coupled with vacuum ageing, proves to be an effective and rapid approach in achieving extreme superhydmphobic states in different metals, which makes it suitable for a wide range of self-cleaning applications.
机译：金属表面的润湿性能在不同的实际和基本应用中起着重要作用。在这项工作中，我们研究了用FemtoSecond和PicoSecond脉冲持续时间的超快纤维激光器烧蚀时三种不同金属（铝，铜和镀锌钢）的润湿性能的变化。分析了激光表面结构中使用的脉冲持续时间和扫描速度的作用。扫描电子显微镜，原子力显微镜和衰减的总反射傅里叶变换红外光谱（ATR-FTIR）用于表征激光结构表面的粗糙度和化学。当在不同的后消融后环境中的老化时比较了三种激光结构金属的疏水性和自清洁特性。当激光烧蚀后立即测量它们的接触角时，铝，铜和镀锌钢的新鲜激光处理样品显示出超硫酸化润湿响应。在环境大气条件下老化30天后，发现这些新激光结构表面的超顺性特征在于在环境大气条件下衰老，而当在低压环境中老化时，它们只需6小时即可转变为超疏水状态。超快激光表面纳米结构和真空老化的纳米结构被证明是一种有效且快速的方法，可实现不同金属中的极端超血管状态，这使其适用于各种自清洁应用。

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