Towards rapid fabrication of superhydrophobic surfaces by multi-beam nanostructuring with 40,401 beams

Petr Hauschwitz, Radka Bičštová, Alexander Brodsky, Natan Kaplan, Martin Cimrman, Jaroslav Huynh, Jan Brajer, Danijela Rostohar, Jaromír Kopeček, Martin Smrž, Tomáš Mocek

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
15 Downloads (Pure)

Abstract

Superhydrophobic surfaces attract a lot of attention due to many potential applications including anti-icing, anti-corrosion, self-cleaning or drag-reduction surfaces. Despite a list of attractive applications of superhydrophobic surfaces and demonstrated capability of lasers to produce them, the speed of laser micro and nanostructuring is still low with respect to many industry standards. Up-to-now, most promising multi-beam solutions can improve processing speed a hundred to a thousand times. However, productive and efficient utilization of a new generation of kW-class ultrashort pulsed lasers for precise nanostructuring requires a much higher number of beams. In this work, we introduce a unique combination of high-energy pulsed ultrashort laser system de-livering up to 20 mJ at 1030 nm in 1.7 ps and novel Diffractive Laser-Induced Texturing element (DLITe) capable of producing 201 × 201 sub-beams of 5 µm in diameter on a square area of 1 mm2. Simultaneous nanostructuring with 40,401 sub-beams resulted in a matrix of microcraters covered by nanogratings and ripples with periodicity below 470 nm and 720 nm, respectively. The processed area demonstrated hydrophobic to superhydrophobic properties with a maximum contact angle of 153.

Original languageEnglish
Article number1987
Number of pages9
JournalNanomaterials
Volume11
Issue number8
DOIs
Publication statusPublished - 2 Aug 2021
Externally publishedYes

Bibliographical note

© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

Funder

This work was co-financed by the European Regional Development Fund and the state budget of the Czech Republic (project HiLASE CoE: Grant 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). We acknowledge CzechNanoLab Research Infrastructure supported by MEYS CR (LM2018110).

Keywords

  • Multi-beam processing
  • Surface functionalization
  • Superhydrophobicity
  • Micromachining
  • Diffractive optics
  • DOE

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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