Research involving water-shedding surfaces

Some of the recent work on water-shedding surfaces involving the group now at the University of Edinburgh has been included in the sections on Water-shedding surfaces and Uses of water-shedding surfaces. Click on the thumbnails below to go to the relevant pages.

Below you can read about some other work of this group related to water-shedding surfaces.

Pinning-free
Evaporation

A droplet’s contact area decreases smoothly when evaporating on a lubricant-impregnated surface. This suppresses the coffee ring-stain effect.

SAW-driven
Motion

Schematic diagram of droplet on SLIPS surface impacted by a SAW

A lubricant-impregnated surface coating can reduce friction between a droplet and substrate, allowing droplet motion to be driven by a surface acoustic wave (SAW).

Liquid Version of
Young’s Law

The contact angle between a droplet and a thin layer of lubricant can be predicted from the lubricant-vapour, lubricant-droplet and droplet-vapour interfacial tensions.

Liquid Lenses
on SLIPS

A SLIP surface allows a droplet to be smoothly and reversibly spread into a film or droplet with a smaller curvature by application of a suitable voltage. This allows the droplet to act as a variable-focus lens.

Cheerios Effect
on SLIPS

Cheerios effect on V shaped surface

The overlap from the lubricant skirt around a droplet on SLIPS can interact with the meniscus from a boundary. This provides a powerful force of attraction between the wall and the droplet.