Surface roughness effects refer to the influence of the microscopic texture of a surface on its interactions with liquids, particularly in terms of wetting and contact angle. This textural variation can significantly alter how a liquid droplet behaves when it comes into contact with a solid surface, impacting the degree of spreading, adhesion, and overall wettability. The roughness can lead to different contact angle behaviors, where smoother surfaces typically result in higher wettability compared to rougher ones, which may trap air pockets and create complex wetting scenarios.
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