In the March issue of Materials World, we write about nanotube-covered titanium that could be used as blood-repellent medical implants. This can be used as clot-resistant surgical implants, described by Dr Arun Kota as ‘the Holy Grail of the medical device industry.’

I’m reminded of a previous demonstration of tuneable superomniphobic surfaces from Kota back in 2014. Again working with titanium, the coating is able to trap certain low surface tension liquids on a variable scale. Also, it looks kinda cool.


Surface Repels All Liquids

by Michael Keller

Engineers report they have created a surface like a Teflon pan on steroids that can repel all liquids.

For years, researchers have been working on coatings that, like lotus leaves, don’t get wet when a liquid falls on them. Such coatings are integral in industrial and other applications where wet surfaces can impact performance or cause corrosion to begin. They are also being pursued for medical applications to prevent bacteria from building up on devices and other surfaces.

Engineered water repellant “superhydrophobic” and oil repellant “superoleophobic” surfaces use textures or chemical means to minimize the surface’s contact with a liquid drop. This forces the droplet to stay intact through the cohesive force of its own surface tension. Up until now, though, even the most water and oil resistant surfaces could still get wet when liquids with extremely low surface tension like certain industrial solvents made contact. 

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