TY - CONF A1 - Kirner, Sabrina V. A1 - Hermens, U. A1 - Winands, K. A1 - Mescheder, H. A1 - Florian, C. A1 - Solis, J. A1 - Siegel, J. A1 - Hischen, F. A1 - Baumgartner, W. A1 - Skoulas, E. A1 - Mimidis, A. A1 - Stratakis, E. A1 - Spaltmann, Dirk A1 - Krüger, Jörg A1 - Bonse, Jörn T1 - Mimicking bug-like surface structures and their fluid transport produced by ultrashort laser pulse irradiation of steel N2 - Ultrashort laser pulses with durations in the fs- to ps-range were used for large area surface processing of steel aimed at mimicking the morphology and extraordinary wetting behaviour of bark bugs (Aradidae) found in nature. The processing was performed by scanning the laser beam across the surface of initially polished flat sample surfaces. A systematic variation of the laser processing parameters (peak fluence, scan velocity, line overlap) allowed the identification of different regimes associated with characteristic surface morphologies (laser-induced periodic surface structures (LIPSS), grooves, spikes, etc.). Additionally, we show that different laser processing strategies, varying laser wavelength, pulse duration and repetition rates, allowed to achieve a range of morphologies that resemble different structures found in bark bugs. For identifying the ideal combination of parameters for mimicking bug-like structures, the surfaces were inspected by optical and scanning electron microscopy. Complementary to the morphology study, the wetting behaviour of the surface structures for water and oil was examined intensively in terms of philic/-phobic nature and fluid transport. With these results in hand, tribological tests were carried out investigating the wear resistance of the laser-induced nano- and microstructures. Our results demonstrate a route towards reproducing complex structures inspired by nature and their functional response in technologically relevant materials. T2 - E-MRS Spring Meeting 2017, Symposium X: New frontiers in laser interaction: from hard coatings to smart materials CY - Strasbourg, France DA - 22.05.2017 KW - Femtosecond laser ablation KW - Laser-induced periodic surface structures (LIPSS) KW - Biomimetics KW - Fluid transport KW - Steel PY - 2017 AN - OPUS4-42354 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -