Wetting Properties of Aluminium Surface Structures Fabricated Using Direct Laser Interference Patterning with Picosecond and Femtosecond Pulses

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Stephan Milles - , Chair of Laser-based Manufacturing (Author)
  • Johannes Dahms - , TUD Dresden University of Technology (Author)
  • Bogdan Voisiat - , Chair of Laser-based Manufacturing, Center for Physical Sciences and Technology (Author)
  • Simonas Indrisiunas - , Center for Physical Sciences and Technology (Author)
  • Gediminas Raciukaitis - , Center for Physical Sciences and Technology (Author)
  • Andres Fabian Lasagni - , Chair of Laser-based Manufacturing, Fraunhofer Institute for Material and Beam Technology (Author)

Abstract

In this work, we report about the fabrication of textured aluminium surfaces using Direct Laser Interference Patterning with picosecond (70 ps) and femtosecond (400 fs) laser pulses as well as their wetting properties. The structuring process was performed by varying the pulse numbers from 25 to 250, resulting in various depths ranging from 0.9 μm to 6.8 μm. The wetting analysis shows that the ps-patterned surfaces exhibit long-term superhydrophobic characteristics (at 21°C and 16 % air humidity). Differently, for the fs-processed substrates, a hydrophobic character was firstly observed, which later (after 16 days) dropped to contact angles similar as the untreated material.

Details

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalJournal of laser micro nanoengineering
Volume16
Issue number1
Publication statusPublished - Apr 2021
Peer-reviewedYes

External IDs

Scopus 85103330481
ORCID /0000-0003-4333-4636/work/196675436

Keywords

Keywords

  • Aluminium 2024, Direct laser interference patterning, Femtosecond, Picosecond, Superhydrophobicity, Wettability