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Proceedings Paper

Picosecond laser ablation of polyamide electrospun nanofibers
Author(s): Marco Götze; Olaf Krimig; Tobias Kürbitz; Sven Henning; Andreas Heilmann; Georg Hillrichs
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Paper Abstract

Electrospun nanofibers mats have a great potential in tissue engineering and regenerative medicine. Their high porosity and enormous volume to surface ratio stimulate the growth and adhesion of mammalian cells and serve as a stable support structure. These suitable properties can be further optimized by structuring of the nanofibers. Ultrashort pulsed lasers can be used for modifying of the electrospun nanofibers without significant heat exposure. It seems also possible to generate very fine cuts from the fiber mats.

In this study, polyamide electrospun nanofibers samples were processed with picosecond UV-laser irradiation (λ = 355 nm, τ = 15 ps). The samples were processed in dry, wet and immersed condition. To optimize cutting and structuring of nanofiber tissue flakes, the influence of different laser parameters on line widths, edge quality, heat-affected zone (HAZ) and the contamination of the fibers by ablated particles (debris) were examined. One additional aim was the minimization of the flake size. It was possible to generate nanofiber flakes in the sub-millimeter range. The quality of the nanofiber flakes could be improved by ablation near the ablation threshold of the material. For cutting under wet conditions shrinking of the flakes has to be taken into account.

Paper Details

Date Published: 17 February 2017
PDF: 9 pages
Proc. SPIE 10094, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII, 100940R (17 February 2017); doi: 10.1117/12.2252312
Show Author Affiliations
Marco Götze, Univ. of Applied Sciences Merseburg (Germany)
Olaf Krimig, Univ. of Applied Sciences Merseburg (Germany)
Tobias Kürbitz, Univ. of Applied Sciences Anhalt (Germany)
Sven Henning, Fraunhofer Institute for Microstructure of Materials and Systems (Germany)
Andreas Heilmann, Univ. of Applied Sciences Anhalt (Germany)
Fraunhofer Institute of Microstructure of Materials and Systems (Germany)
Georg Hillrichs, Univ. of Applied Sciences Merseburg (Germany)


Published in SPIE Proceedings Vol. 10094:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII
Alexander Heisterkamp; Peter R. Herman; Michel Meunier; Roberto Osellame, Editor(s)

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