The new actuating material — nickel hydroxide-oxyhydroxide — can be instantly triggered and wirelessly powered by…

The new actuating material — nickel hydroxide-oxyhydroxide — can be instantly triggered and wirelessly powered by low-intensity visible light or electricity at relatively low intensity. It can exert a force of up to 3000 times its own weight — producing stress and speed comparable to mammalian skeletal muscles, according to the researchers.

http://www.kurzweilai.net/new-material-eliminates-need-for-motors-or-actuators-in-future-robots-other-devices
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