Recently, scientists in the United Kingdom and the Netherlands have developed a robot that can crawl like a caterpillar. Its power source is only a single constant light source. This design concept is very ingenious: they will be produced after the longer polymer material is mounted on the shorter frame will produce a bulge, when the purple LED light shines on the material in front of the protrusion, this part will shrink, so that the other A portion of the material is exposed to the LED light source.
In this way, this small framework can continue to move. Team members said that the invention can transport small items to narrow places or use it to clean solar cell surfaces.
This technique relies on a light-sensitive liquid crystal material that can rapidly change shape under the influence of light. The researchers further modified it to deform almost instantaneously under LED light, and reverted to the original light when the light disappeared.
Although this polymer material looks transparent, it can completely block purple light, so the side facing away from the LED light will not be affected. If you reverse it, the frame will move in the opposite direction. Although we have seen equipment powered by lasers, solar energy, etc. before, this robot is the first device driven by light.
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