Simultaneous micro structuring and functionalisation of surfaces with picosecond laser

Jens Hildenhagen*, Klaus Dickmann, Johannes Neyer, Christoph Wieschendorf

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

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.

Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationInternational Conference on Optics in Precision Engineering and Nanotechnology (icOPEN 2013)
EditorsChenggen Quan, Kemao Qian, Anand Asundi
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-7
Number of pages7
ISBN (Print)9780819495679
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventInternational Conference on Optics in Precision Engineering and Nanotechnology, icOPEN 2013 - Singapore, Singapore
Duration: 9 Apr 201311 Apr 2013

Publication series

NameProceedings of SPIE
Volume8769
ISSN (Electronic)0277-786X

Other

OtherInternational Conference on Optics in Precision Engineering and Nanotechnology, icOPEN 2013
CountrySingapore
CitySingapore
Period9/04/1311/04/13

Keywords

  • surface functionalisation
  • micro structuring
  • ultra short pulse laser irradiation
  • substructures
  • micro fluidic
  • Lab-on-a-Chip

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