New Scientist - March 19, 2009, by Kurt Kleiner
A new material that is weight for weight stronger than steel and stiffer than diamond, and weighs little more than its volume in air, could be the perfect artificial muscle for robots.
"We've made a totally new type of artificial muscle that is able to provide performance characteristics that have not previously been obtained," says Ray Baughman, a materials scientist at the University of Texas, Dallas, and co-developer of the new muscle.
Baughman and colleagues have developed a technique to make ribbons of tangled nanotubes that expand in width by 220% when a voltage is applied and then return to their normal size once it is removed. The process takes only milliseconds.
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