Researchers at Northwestern University have created a little robot that looks like an animal you might find in the sea. This robot is 90% water by weight. It is made of a hydrogel exterior while its nickel skeleton allows it to change shape.
The researchers used a chemical synthesis process to program molecules to respond to light. When exposed to light, the robot molecules can repel water. Its legs can stiffen, shifting it from a flat position to a standing one.
Using a magnetic field, the robot can move at a typical human walking speed. Researchers suggest that future versions could work on a microscopic level. It could also be designed to use “mechanical movements and locomotion to precisely deliver bio-therapeutics or cells to specific tissues.”
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