High-throughput direct laser interference patterning: New configurations and applications

Publikation: Beitrag in Buch/Konferenzbericht/Sammelband/GutachtenBeitrag in KonferenzbandBeigetragenBegutachtung

Beitragende

Abstract

This study describes the fabrication of dot and line-like periodic surface structures on metals, using new developed optical configurations based on Direct Laser Interference Patterning (DLIP). The optical setups are optimized for high throughput processing, for instance by shaping the beam profiles to elongated rectangular laser spots (with approximately 5.0 mm x 0.1 mm size) or by combining the DLIP optics with a scanner system. Later, aluminum and stainless steel substrates are processed using a nanosecond and picosecond pulsed laser source delivering up to 13 W and 180 W of laser power for the 10 ps and 10 ns systems, respectively. Depending on the pulse repetition rate applied and the pulse duration, a significant heating of the substrate volume was observed for the ns pulses. In this way, driven by Marangoni convection mechanisms, structures with exceptionally high aspect ratios could be produced. In case of the structures processed with ps pulses, large areas showing high pattern homogeneity were fabricated. Finally, water contact angle measurements of the produced structures are used to demonstrate the capability to control the surface wettability of the metals, even reaching super-hydrophobic conditions (using deionized water at room temperature). Also, the ability of the textured surface for increasing the freezing time of water droplets, and thus reducing ice-formation, is demonstrated at -20°C. Finally, the applicability of the DLIP scanner technology for decorative applications is shown. The characterization of the treated and untreated surfaces was performed using scanning optical microscopy and white light interferometry.

Details

OriginalspracheEnglisch
TitelLaser-Based Micro- and Nanoprocessing XIV
Redakteure/-innenUdo Klotzbach, Akira Watanabe, Rainer Kling
Herausgeber (Verlag)SPIE - The international society for optics and photonics
ISBN (elektronisch)9781510632998
PublikationsstatusVeröffentlicht - 2020
Peer-Review-StatusJa

Publikationsreihe

ReiheProceedings of SPIE - The International Society for Optical Engineering
Band11268
ISSN0277-786X

Konferenz

TitelLaser-Based Micro- and Nanoprocessing XIV 2020
Dauer3 - 6 Februar 2020
StadtSan Francisco
LandUSA/Vereinigte Staaten

Externe IDs

ORCID /0000-0003-4333-4636/work/196675505

Schlagworte

Schlagwörter

  • Direct laser interference patterning, High throughput, Large area processing, Surface functionalization