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Effects of periodic surface structures induced by femtosecond laser irradiation on the antibacterial properties of Zr-based amorphous material

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Hanxuan Huang
  • Peilei Zhang
  • Zhishui Yu
  • Xia Zhang
  • Lei Shen
  • Haichuan Shi
  • Hua Yan
  • Liqiang Wang
  • Yingtao Tian
Article number169760
<mark>Journal publication date</mark>31/10/2022
Number of pages15
Publication StatusPublished
Early online date5/08/22
<mark>Original language</mark>English


Objective In this essay, a femtosecond laser is used to create various structures on the surface of Zr-based amorphous material. Methods Through the raster scan mode, under different laser energy densities, LIPSS (Laser-induced periodic surface structures), SWPSS (Super-wavelength periodic surface structure) and microporous structures were obtained in the experiment. Various surface properties of the micro-nano structures were tested. Result Experimental results illuminate that laser energy fluence is the key to determining the formation of nano- and microscale structures. The laser treatment greatly improves the surface roughness of the sample. The laser texture converts the originally hydrophilic specimen surface into a hydrophobic surface, which greatly reduces the material's surface energy. We found that all the formed surface structures can reduce the adhesion of Escherichia coli and Staphylococcus aureus. In detail, the adhesion rate of bacteria on the surface of SWPSS is the lowest. Conclusion This article comprehensively discusses the influence mechanism of nano- and microscale structures on bacterial adhesion from four aspects: surface roughness, hydrophobicity, surface energy, and surface morphology. The study manifest that the period and amplitude of the nano- and microscale structures are the keys to bacterial adhesion. In addition, experiments have shown that nano- and microscale structures can effectively improve the corrosion resistance of zirconium-based bulk metallic glass.