Jetting Micron-Scale Droplets onto Chemically Heterogeneous Surfaces

Details Jetting Micron-Scale Droplets onto Chemically Heterogeneous Surfaces Jetting Micron-Scale Droplets onto Chemically Heterogeneous Surfaces

2003-05-16

arxiv.org/abs/cond-mat/0305377v2

Physics

Condensed Matter

Soft Condensed Matter

14 pages, accepted for publication in Langmuir

Scientific paper

We report experiments investigating the behaviour of micron-scale fluid droplets jetted onto surfaces patterned with lyophobic and lyophilic stripes. The final droplet shape depends on the droplet size relative to that of the stripes. In particular when the droplet radius is of the same order as the stripe width, the final shape is determined by the dynamic evolution of the drop and shows a sensitive dependence on the initial droplet position and velocity. Numerical solutions of the dynamical equations of motion of the drop provide a close quantitative match to the experimental results. This proves helpful in interpreting the data and allows for accurate prediction of fluid droplet behaviour for a wide range of surfaces.

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