Nanostructure fabrication on the top of laser-made micropillars for enhancement of water repellence of aluminium alloy

P. Hauschwitz, R. Jagdheesh, D. Rostohar, J. Brajer, J. Kopeček, P. Jiříček, J. Houdková, T. Mocek

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Fabrication of superhydrophobic surfaces is a popular topic in research and industry due to many potential applications including self-cleaning, anti-icing or drag reduction. Laser micro and nanostructuring is an efficient method to replicate lotus leaves double-scale structures to achieve superhydrophobicity without chemical treatment. Immediately after laser processing, samples are hydrophilic and become hydrophobic in a few days, exposed to atmospheric conditions. This time was significantly reduced by vacuum processing to only 4 h. Two-step fabrication method of superhydrophobic surfaces have been developed using nanosecond laser system. In the first step, large scale micropillars are fabricated and covered by nano-scale protrusions in the following step using defocused laser beam. The nanostructure formation increased the apparent contact angle from 149° to 175°.

Original languageEnglish
Article number126601
JournalMaterials Letters
Volume256
Early online date30 Aug 2019
DOIs
Publication statusPublished - 1 Dec 2019
Externally publishedYes

Funder

This work was supported by European Structural and Investing Funds , Operational Programme Research, Development and Education (Grant agreement NO CZ.02.1.01/0.0/0.0/15_006/ 0000674) and from the European Union’s Horizon 2020 research and innovation programme (Grant agreement NO 739573) and by the Ministry of Education, Youth and Sports of the Czech Republic (grant LM2015088).

Keywords

  • Fiber laser
  • Superhydrophobic
  • Aluminium
  • Nanostructures

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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