Watch these glowing micro machines take flight.
their unique wings, made of a rubber-like material and electrodes, that flap when voltage is applied.The researchers incorporated electroluminescent zinc sulfate particles to illuminate the artificial muscles when electrified. When the robots are operated at a high frequency, the zinc sulfate particles become particularly vibrant—and, because the particles increase the robots’ weight by only 2.5 percent, they won’t impair how the machines fly.
Once they had the basics down, the team experimented with different colors and even patterned lights. They also began running test flights, using the lights to track the robots through iPhone cameras and a specially designed computer program. Since the robots are so light, they cannot carry sensors, which previously limited researchers’ ability to test them outside of the lab. Adding the lights was a “major step” toward flying the robots outdoors, now that they can be more easily tracked.
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