A new technology revealed today demonstrates the ability of an artificial skin that can detect the pressure of a butterfly landing - this opens up incredible possibilities for robot-controlled processes or even artificial limbs. The skin uses a polymer that, when compressed, changes the capacitance of the skin which can then be detected by a transistor. If an array of transistors is used, it can track differences in pressure applied to the skin.
The original Nature News article can be found here, and a layman's description on the BBC News site is here.
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