Affiliation:
1. Department of Mechanical Engineering Koç University Sariyer/Istanbul 34450 Turkiye
2. Department of Chemical Engineering Imperial College London London SW7 2AZ UK
3. Koç University Arçelik Research Center for Creative Industries (KUAR) Koç University Sariyer/Istanbul 34450 Turkiye
4. Koç University Research Center for Translational Medicine Koc University Sariyer/Istanbul 34450 Turkiye
5. Boğaziçi Institute of Biomedical Engineering Boğaziçi University Çengelköy/Istanbul 34684 Turkiye
Abstract
Laser ablation has been utilized for locally and selectively modifying the surface wettability of materials in situ and enabling on‐demand microfabrication. The anisotropic wettability has been observed on chemical and/or topographical patterns, such as an array of laser‐inscribed strips with spacings, created on surfaces during the fabrication process. Herein, the effectiveness of the femtosecond laser ablation is evaluated in selectively modifying surface wettability. The areas processed by laser ablation exhibit anisotropic wetting behavior, even after the laser strips are overlapped. The laser‐induced anisotropic surface wettability is present in space governed by laser scanning speed, scan/strip overlap, laser fluence, scan repetition, and bidirectional scanning angle. Moreover, the femtosecond laser ablation process is optimized to enhance the conventional laser inscription, leading to a modified and consistent methodology to achieve cost‐effective fabrication.
Subject
Condensed Matter Physics,General Materials Science