It folds, it walks, it swims, it dissolves: the self-building mini-robot
This week’s video shows how a sheet can self-fold into a functional 3D robot, actuate immediately for untethered walking and swimming, and then dissolve in liquid.
In use, the robot could be used in medical applications but making one as agile – and disposable - as this one has proved challenging.
According to its developers from MIT and TU Munich, the sheet weighs 0.31g, spans 1.7cm square in size, features a cubic neodymium magnet, and can be thermally activated to self-fold. They add that since the robot has asymmetric body balance along the sagittal axis, the robot can walk at a speed of 3.8 body-length/s being remotely controlled by an alternating external magnetic field.
Developed models include an acetone-degradable version, which allows the entire robot’s body to vanish in a liquid.
Shuhei Miyashita, Steven Guitron, Cynthia R. Sung, and Daniela Rus from MIT and Marvin Ludersdorfer TU Munich describe how they developed with robot in a paper titled: An untethered miniature origami robot that self-folds, walks, swims, and degrades.
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