Drop Friction on Textured Lubricant-Coated Surfaces.

ABSTRACT: Understanding drop friction on textured surfaces has implications in microfluidics and lab-on-a-chip devices. In this work, we investigated the drop friction on lubricant-coated pillars by systematically varying pillar height and density. First, we measured the friction force on a moving drop using a cantilever force sensor that has ±0.1 μN sensitivity. This measurement shows that drop friction on tall dense pillars is comparable to drop friction on short pillars, a significant result that suggests the presence of a Landau-Levich-Derjaguin (LLD) film underneath the moving drop. Second, we validated the force measurement by estimating the lubricant layer thickness by using white-light interferometry. Third, we visualized the lubricant film underneath the moving drop using reflection interfe

SUBMITTER: Chen X 

PROVIDER: S-EPMC12581128 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature