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Programmable hydrogel 'smart skin' can hide images, shift texture, and morph shape
At first glance, it looks like a plain, slightly glossy sheet. Then it goes through a quick bath, the temperature shifts, and a famous face comes back from nowhere. In one demonstration, a film made ...
The researchers turned to hydrogels, which are water-rich, jelly-like polymers that respond to temperature and chemicals. But ...
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