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A gel-like yield stress fluid, top, moves as a plug without shearing in a tube with the new surface coating. At bottom, the same fluid is seen shearing while it flows in an uncoated tube, where part of the fluid gets stuck to the tube while part of it continues to flow.

How slippery surfaces allow sticky pastes and gels to slide

An MIT research team that has already conquered the problem of getting ketchup out of its bottle has now tackled a new category of...
This photo shows water droplets placed on the nanostructured surface developed by MIT researchers. The colors are caused by diffraction of visible light from the tiny structures on the surface, ridges with a specially designed shape. Images: Kyle Wilke

A new approach to liquid-repelling surfaces

Omniphobic surfaces could potentially be used in everything from ship hulls that reduce drag and increase efficiency, to coverings that resist stains and protect against...

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