"Here's how it works: Scientists combine gold nanoparticles in liquid form until the solution turns blue. Then they embed that solution into a polymer film, thin and flexible like a Band-Aid. As the film gets stretched — by being pressed or hit — those nanoparticles start separating. And when the particles break apart, they change color again. Press lightly, and you get purple. Press harder, and the sensor will turn red."Pretty amazing discovery... thought we had something similar to this already...
but I've been wrong before...
link to article here.
take it easy ;)
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