Artificial Muscle Thousand Times Stronger Than Human Muscle

by Dr. Enozia Vakil on  December 22, 2013 at 3:22 PM Lifestyle News   - G J E 4
Scientists have now constructed a micro-sized robotic muscle using vanadium dioxide, which is 1000 times powerful than the human muscles.
 Artificial Muscle Thousand Times Stronger Than Human Muscle
Artificial Muscle Thousand Times Stronger Than Human Muscle

Junqiao Wu, a physicist who holds joint appointments with Berkeley Lab's Materials Sciences Division and the University of California-Berkeley's Department of Materials Science and Engineering, said that they've created a micro-bimorph dual coil that functions as a powerful torsional muscle, driven thermally or electro-thermally by the phase transition of vanadium dioxide.

He said that using a simple design and inorganic materials, they achieve superior performance in power density and speed over the motors and actuators now used in integrated micro-systems.

Wu and his colleagues fabricated their micro-muscle on a silicon substrate from a long "V-shaped" bimorph ribbon comprised of chromium and vanadium dioxide.

When the V-shaped ribbon is released from the substrate it forms a helix consisting of a dual coil that is connected at either end to chromium electrode pads.

Heating the dual coil actuates it, turning it into either a micro-catapult, in which an object held in the coil is hurled when the coil is actuated, or a proximity sensor, in which the remote sensing of an object (meaning without touching it) causes a "micro-explosion," a rapid change in the micro-muscle's resistance and shape that pushes the object away.

Wu said that the multiple micro-muscles can be assembled into a micro-robotic system that simulates an active neuromuscular system, asserting that the naturally combined functions of proximity sensing and torsional motion allow the device to remotely detect a target and respond by reconfiguring itself to a different shape.

The paper has been published in the journal Advanced Materials.

Source: ANI

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