Ngo Chi-Vinh, Liu Yu, Li Wei, Yang Jianjun, Guo Chunlei
GPL Photonics Laboratory, State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Nanomaterials (Basel). 2023 Apr 17;13(8):1392. doi: 10.3390/nano13081392.
Conversion of a regular metal surface to a superhydrophobic one has great appeal because of the wide range of potential applications such as anti-fouling, anti-corrosion, and anti-icing. One promising technique is to modify surface wettability by laser processing to form nano-micro hierarchical structures with various patterns, such as pillars, grooves, and grids, followed by an aging process in the air or additional chemical processes. Surface processing is typically a lengthy process. Herein, we demonstrate a facile laser technique that converts the surface wettability of aluminum from inherently hydrophilic to hydrophobic and superhydrophobic with single-shot nanosecond laser irradiation. A single shot covers a fabrication area of approximately 19.6 mm. The resultant hydrophobic and superhydrophobic effects persisted after six months. The effect of the incident laser energy on the surface wettability is studied, and the underlying mechanism of the wettability conversion through single-shot irradiation is suggested. The obtained surface shows a self-cleaning effect and the control of water adhesion. The single-shot nanosecond laser processing technique promises a fast and scalable method to produce laser-induced surface superhydrophobicity.
将常规金属表面转化为超疏水表面具有很大的吸引力，因为其具有广泛的潜在应用，如防污、防腐和防冰。一种有前景的技术是通过激光加工来改变表面润湿性，以形成具有各种图案（如柱状、沟槽状和网格状）的纳米-微米分级结构，随后在空气中进行老化处理或进行额外的化学处理。表面处理通常是一个漫长的过程。在此，我们展示了一种简便的激光技术，通过单次纳秒激光照射就能将铝的表面润湿性从固有的亲水性转变为疏水性和超疏水性。单次照射覆盖的加工面积约为19.6平方毫米。所产生的疏水和超疏水效果在六个月后仍然存在。研究了入射激光能量对表面润湿性的影响，并提出了通过单次照射实现润湿性转变的潜在机制。所获得的表面具有自清洁效果和对水附着力的控制。单次纳秒激光加工技术有望成为一种快速且可扩展的方法来产生激光诱导的表面超疏水性。
