Various micron and submicron structures were laser-induced on silicon, including LIPSS (laser-induced periodic surface structures), grooves, conical spikes and deep craters. We used a fibre-based femtosecond (fs) laser toablate the silicon wafer in ambient air. The formed structures strongly depend on the per-pulse laser fluence and the number of delivered pulses. We characterized the obtained structures using electron scanning microscopy and atomic force microscopy. Our results revealed interesting features such as flipping structure orientation and the coexistence of two or more types of structures that exhibit a unique wetting behaviour (contact angle with water). We found that the type of surface structures significantly influences the surface wettability.
Volume 46, 2023
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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