A new high-tech glove totally sucks — and that’s a good thing.
Each fingertip is outfitted with a sucker inspired by those on octopus arms. These suckers without squeezing too tightly, researchers report July 13 in Science Advances.
“Being able to grasp things underwater could be good for search and rescue, it could be good for archaeology, [and] could be good for marine biology,” says mechanical engineer Michael Bartlett of Virginia Tech in Blacksburg.
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Each sucker on the glove is a raspberry-sized rubber cone capped with a thin, stretchy rubber sheet. Vacuuming the air out of a sucker pulls its cap into a concave shape that sticks to surfaces like a suction cup. Pumping air back into the sucker inflates its cap, causing it to pop off surfaces. Each finger is also equipped with a Tic Tac–sized sensor that detects nearby surfaces. When the sensor comes within some preset distance of any object, it switches the sucker on that finger to sticky mode.
Bartlett and colleagues used the glove to pick up objects underwater, including a toy car, plastic spoon and metal bowl. Each sucker could lift about one kilogram in open air — and could lift more underwater, with the help of buoyancy, Bartlett says. Adding more suckers could give the glove an even stronger grip.
The octopus-inspired glove barely brushes the surface of what octopuses and other cephalopods can do. Octopuses can individually control thousands of suckers across their eight arms to feel around the seafloor and snatch prey. The suckers do this using not only tactile sensors, but also chemical-detecting cells that “taste” their surroundings (SN: 10/29/20).
The new glove is far from turning fingers into extra tongues. But Bartlett is intrigued by the possibility of adding chemical sensors so that the suckers stick to only certain materials.