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6 February 2019 Controllable wettability of metallic surfaces via micro-nano structure fabricated by femtosecond laser
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Abstract
Micro-pits array structure, micro-gratings structure covered with finer nanostructures were generated on titanium surfaces using femtosecond laser pulse. The wetting behavior of the two types of surface structures were studied. Micropits array structure with a size of dozens of microns exhibits hydrophilic properties, and the hydrophilicity increased with increasing the number of laser pulses. Micro-gratings structure covered with finer nanostructures exhibits hydrophobic properties, and the hydrophobicity increased with decreasing the laser energy density. The results demonstrated that wettability of metallic surface can be facilely controlled by adjusting the femtosecond laser processing parameters. The formation processes of the two types of surface microstructures as well as the underlying mechanisms for their special wettability are also discussed. This research might provide a facile controllable strategy to realize special wettability for metal or other solid surfaces, even expand the functions and applications of metals.
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Liang Yang, Tian Chen, Qin Yang, Wen Jie Wu, Shuqian Fan, and Xuan Ming Duan "Controllable wettability of metallic surfaces via micro-nano structure fabricated by femtosecond laser", Proc. SPIE 10842, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Subdiffraction-limited Plasmonic Lithography and Innovative Manufacturing Technology, 1084209 (6 February 2019); https://doi.org/10.1117/12.2505916
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