A Laser Scanning Method to Control the Location, Shape, Contact Angle and Sliding of Water Droplet on Superhydrophobic Surface

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

11 Scopus Citations
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  • Hui Zhang
  • Yang Liu
  • Meng Hua
  • Guang-Neng Dong

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Original languageEnglish
Article number1801375
Journal / PublicationAdvanced Engineering Materials
Issue number7
Online published9 Apr 2019
Publication statusPublished - Jul 2019


A simple and novel approach is proposed to control location, shape, contact angle, and sliding of droplet on superhydrophobic aluminum alloy surfaces scanned by laser. By firstly etched suitably, followed by coating with stearic acid, aluminum alloy surface is possible to exhibit the property of superhydrophobic behavior. Irradiating such surface with specific hydrophilic patterns, by a relatively high power and precisely controlled laser, allows fixing the location and shape of water droplets. Suitably altering scanning time and power of the laser beam, the fabricated surface facilitates the control of the contact angle of droplet. Properly railing hydrophilic lines/curves on such superhydrophobic surface facilitates constraining droplet to slide and water to flow in certain controllable orientations. Furthermore, relevant likely mechanisms involved in controlling the location, shape, contact angle, and sliding of water droplet on hydrophobic/hydrophilic surface have also been elucidated systematically on the basis of analyzation of electrical scanning images.

Research Area(s)

  • control, laser, pattern, superhydrophobic surface, water droplet

Citation Format(s)