By combining cutting-edge chemistry with the ancient concept of signaling flares, researchers have made an information-dense fuse that transmits complicated messages as it burns.
The so-called “infofuse” is made from dots of lithium, rubidium and cesium laid on a line of fast-burning nitrocellulose. Different combinations of the metals produce different intensities and wavelengths of light, from visible to infrared. These characteristics can be precisely controlled, allowing the fuses to convey a form of chemical Morse code.
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