Watch this tiny robot go! The lining of the gut is slimy and slippery, but this 'millibot' can get a grip using its spiky feet – and it could eventually be used to deliver therapies inside the human body
Tiny robots with soft, flexible bodies and spiky feet can climb along the moist, slippery inner walls of the lungs and the gut where they could one day deliver drugs and medical sensors in hard-to-reach places.
Capable of climbing straight up – and even upside down – inside the human body, the wireless device represents “a significant milestone in soft robotics”, sayscould walk, roll, swim, jump and crawl along biological tissues, he says. But it couldn’t climb up the complex 3D surfaces in the body, which is critical for reaching hard-to-access areas within the heart, lungs and digestive system.
In a series of laboratory tests, the researchers found that the robot will keep climbing along and clinging to “highly slippery” and often wrinkled biological tissue, even when the tissue is shaken or flushed with water. “I was very excited and surprised,” Sitti says of the results.
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