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Metals, Volume 9, Issue 9 (September 2019)
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Cover Story (view full-size image) The wetting behavior of Ti6Al4V surfaces that were groove-structured by means of femtosecond laser [...] Read more. The wetting behavior of Ti6Al4V surfaces that were groove-structured by means of femtosecond laser irradiation was investigated. Highly accurate structures with a gap width of 20 µm, a gap depth of 10 µm, and varying strut widths (1–300 µm) were generated and the contact angles in parallel and perpendicular direction were measured using ultrapure water 1, 8, and 15 days after irradiation. All deterministic surfaces showed a strong anisotropic wetting behavior and a pronounced contact angle change over time. The resulting contact angles in the parallel and perpendicular directions were affected by the strut width. The generated anisotropic behavior also clearly depended on the surface chemistry within the gaps. View this paper.