A superhydrophobic surface patterned with hydrophilic channels for directional sliding control and manipulation of droplets

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

9 Scopus Citations
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  • Hui Zhang
  • Yang Liu
  • Zhiwei Zhang
  • Meng Hua
  • Guangneng Dong

Related Research Unit(s)


Original languageEnglish
Article number126836
Journal / PublicationSurface and Coatings Technology
Online published13 Jan 2021
Publication statusPublished - 15 Mar 2021


Rapid and controllable sliding of droplets on anisotropic superhydrophobic surface has significant meaning in advanced science and technologies, thus being widely studied in recent years. Herewith, we reported a fabrication of micro- and nano- fractal superhydrophobic surface patterned with micro hydrophilic channels using laser direct writing method. The sliding angle of droplets in the direction parallel to the channels is as low as 8°. While, in the perpendicular direction, droplets exhibit rather high sliding angle, even being pinned to the surface that is tilted to fully upright (sliding angle to be 90°). Such significant anisotropic property enables droplets slide along the pre-assigned stripe-shaped patterns rapidly and steadily, when a droplet is released on a slope. The guidance action still works even when the surface is inverted. Consequently, the patterned surface is suitably designed as a novel droplet manipulate device, which easily achieves effective weight lossless transportation of droplets.

Research Area(s)

  • Control, Sliding, Superhydrophobic, Water droplet