Physicists explain why some fast-moving droplets stick to hydrophobic surfaces – Physics World

Physicists Explain Droplet Behavior on Hydrophobic Surfaces

New experiments and calculations shed light on the behavior of fast-moving droplets on water-repelling surfaces, with implications for aerosol and microfluidic technologies, as well as airborne disease transmission.

Researchers from the UK and the Netherlands investigated what happens when a microscopic drop of water lands on a hydrophobic surface. The outcome is crucial for various everyday situations, including pesticide application and disease spread.

If the droplet moves too slowly, it sticks. Too fast, and it sticks again.

According to Jamie McLauchlan, a PhD student at the University of Bath, the relationship between droplet speed and surface adhesion is more complex than initially thought.

Author's summary: Physicists uncover complex behavior of droplets on hydrophobic surfaces.

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Physics World Physics World — 2025-10-15

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