A soft tubular robot made of light-sensitive material bends into different shapes depending on the frequency of light that hits it.
A tubular, soft robot controlled by light can pump liquids, unscrew bolts and travel through pipes. The robot can also be designed to bend in the direction of a light source, like a plant tilting towards the sun.
In some materials, molecules can gain energy from light, which makes the material expand or contract.at Westlake University in China used this effect to create prototypes of a soft robot made up of a tube 15 to 40 millimetres long. He and his colleagues wound filaments of a light-sensitive elastic material into an arrangement inspired by an elephant’s trunk, which has muscle fibres layered together in such a way that they can assumeClever design makes sticky tape that's strong but easily removed
Instead of the robot’s fibres responding to electrical signals from the brain, like in an elephant, they responded to light. When illuminated with light of different frequencies and intensities, the robot took on different shapes. In one experiment, the researchers filled the robot with a liquid and connected it to a tube that led to a raised container. Using light to make the robot contract pumped the liquid upwards and into the container. In another, they slid the robot through a curved pipe that had a bolt at the bottom.
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