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Student Wetting properties of the aluminium surface structures fabricated using Direct Laser Interference Patterning with picosecond and femtosecond pulses

Wednesday (24.06.2020)
13:16 - 13:19 Room 1
Part of:
- Poster Periodic microstructuring of metal moulds using direct laser interference patterning for nanoimprint replication 1 Dr. Marcos Soldera
- Poster Comparison of structural colors achieved by laser induced periodic surface structures and direct laser interference patterning 1 Dr. Marcos Soldera
- Poster *student* Wetting properties of the aluminium surface structures fabricated using Direct Laser Interference Patterning with picosecond and femtosecond pulses 1 Dipl.-Ing. Stephan Milles
- Poster The numerical realization of a model of interaction of ultrashort laser pulses with solid 1 Prof. Vladimir Zhukov
- Poster On the problem of the initial conditions for tightly-focused ultrashort laser pulses in the modeling of laser beam propagation in transparent solids 1 Prof. Vladimir Zhukov
- Poster Innovative polymer coating systems – applied by laser sintering technique 1 Dr. Anna Buling
- Poster Tangential laser turning of fused silica usin ultra-short laser pulses 1 Julian Zettl
- Poster Process optimization of Direct Laser Interference Patterning 1 Dr. Bogdan Voisiat
- Poster Dynamic aberration correction via spatial light modulator (SLM) for femtosecond direct laser writing 1 Gabrielius Kontenis
- Poster Modification of metal nanoparticles via femtosecond laser pulses and their application for SERS 1 Dr. Asta Tamuleviciene
- Poster Ultraviolet and Infrared Femtosecond Laser Irradiation of Thermoplastics PET and PA66 1 Dr. Xxx Sedao
- Poster High pulse energy femtosecond laser machining station for the interference and parallel processing 1 Dr. Simonas Indrisiunas
- Poster Laser material processing with a multi-beam setup based on Excited State Absorption 1 Sebastian Engel
- Poster GO-neutral red nanocomposite reduction by pulsed laser irradiation 1 Dr. Romualdas Trusovas
- Poster *student* Numerical simulation of energy relaxation in Mo thin films exposed to femtosecond laser pulse 1 Kryštof Hlinomaz
- Poster Modification of medical-grade poly(L-lactide) using femtosecond laser filamentation 1 Dr. Bogusz Stepak
Session Chair

Session PS: Poster Session 02
Belongs to:
Topic PS: Poster Session

During the past years, Direct Laser Interference Patterning (DLIP) has been established as a technology capable to produced microstructured surfaces on several materials and thereby becoming as a tool for the surface functionalization [1]. By controlling both the number and geometrical arrangement of the interfering beams, different kind of periodic patterns can be produced. For example, using a four-beam interference setup results in a dot-like geometry. In addition, also the pulse duration of the used laser source plays a decisive role in the ablation process, since thermal effects induced on the material’ surface are strongly correlated with this variable as well as with the thermal properties of the treated materials [2, 3]. Within this contribution, four-beam DLIP is performed on pure aluminum (EN AW-1050) using picosecond (ps) and femtosecond (fs) pulses. The distance between the repetitive dots of the pattern (spatial period) was set to 4 μm in this case. To examine the influence of the pulse duration on the ablation process on the geometry and topology of the produced features, other influencing variables such as laser wavelength, laser fluence, spatial period and external environmental conditions were kept constant. The topography of the laser treated samples was analyzed using confocal microscopy as well as by scanning electron microscopy (Fig. 1).

Finally, the wetting performance of the processed samples was measured over a period of 30 days. It was found that with ps ablation, the produced structures are significantly rougher, with values in the micrometer range compared to a few hundred of nanometers when using fs pulses, and therefore reaching superhydrophobic condition. In contrast, the fs-treated surfaces showed temporarily a hydrophobic characteristic (for 15 days) and after that reached similar water contact angles similar as the untreated reference.

Additional Authors:
  • Dr. Bogdan Voisiat
    Technische Universität Dresden
  • Prof. Dr. Andrés Fabián Lasagni
    Technische Universität Dresden
  • Johannes Dahms
    Technische Universität Dresden
  • Dr. Simonas Indrisiunas
    FTMC - Center for Physical Sciences and Technology
  • Dr. Gediminas Raciukaitis
    FTMC - Center for Physical Sciences and Technology


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