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Proceedings Paper

Simultaneous microstructuring and functionalisation of surfaces with picosecond laser
Author(s): Jens Hildenhagen; Klaus Dickmann; Johannes Neyer; Christoph Wieschendorf
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Paper Abstract

The generation of microstructures by ultrashort pulse laser irradiation is - depending on process parameters and the applied material - often accompanied with the creation of substructures like ripples or micro canals on the ablation ground. This side effect can be used to create local topographic modifications on a microscopic scale which can change functional properties of the surface. The combination of micro structuring and functionalisation within one production step can only be successful if the interaction mechanisms are well known. In this study the options to modify the wetting behavior on stainless steel, Al2O3 ceramic and PMMA plastic were analyzed. Therefore the contact angles of water drops on picoseconds-laser-produced samples were measured by a self-made measuring system. Test measurements offered post-process effects on surfaces of steel and ceramic. On those substrates the final contact angle adjusts after several hours up to days. In total with this technique contact angles between 5° and 160° could be realized, depending on the material. This allows generation of hydrophilic up to super-hydrophobic effects on precise defined areas. The combination technique offers novel options particularly for micro fluidic. Some produced samples for “Lab-on-a-Chip- Systems” should demonstrate that.

Paper Details

Date Published: 22 June 2013
PDF: 7 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87691D (22 June 2013); doi: 10.1117/12.2019055
Show Author Affiliations
Jens Hildenhagen, Muenster Univ. of Applied Sciences (Germany)
Klaus Dickmann, Muenster Univ. of Applied Sciences (Germany)
Johannes Neyer, Muenster Univ. of Applied Sciences (Germany)
Christoph Wieschendorf, Muenster Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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