American researchers have developed a miniature device that can pull 165 times its weight. This new type of actuator that can work like a muscle and convert electrical energy into mechanical energy has broad application prospects. It is expected to flex its muscles in electromechanical systems and robot systems in the future. The relevant research results were published in the journal Nature on the 30th.
This super-micro "Hercules" is called "Anti-Serial Connected Biomorphic Drive" and was developed by researchers at Rutgers University's New Brunswick campus. The device is made of an inorganic crystalline mineral compound, molybdenum disulfide (MoS2). The researchers assembled and stacked the molybdenum disulfide nanosheets to form a device similar to a battery electrode. The drive is highly conductive and can insert and remove ions. The process of inserting and removing ions causes the nanoflakes to expand and contract, creating a force that triggers the movement of the flexible material. Experiments have shown that this tiny device, which weighs only 1.6 milligrams, can continuously pull 265 milligrams, which is 165 times its own weight.
Since such an electrochemical device can be manufactured only by stacking nanosheets, the process is simple, and thus its mechanical properties such as stress and strain are particularly remarkable. The researchers said that the molybdenum disulfide nanosheets can be simply stacked and can withstand stress strain equivalent to other actuator materials, which is an important discovery in the field of electrochemical actuators. Such devices have great development prospects in electromechanical systems and robotic systems. In the next step, they will try to scale up the device and try to create actuators that can move larger objects. (Reporter Liu Haiying)
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