Results: Researchers at the University of Texas at Dallas made nanotube yarn that twists in response to electricity, enabling it to act as a motor. For a given length, it twists 1,000 times more than other materials designed for use as tiny motors, such as shape-memory alloys that change shape in response to heat or another stimulus. The fastest of the nanotube motors spins at 600 revolutions per minute and can generate as much twisting force as a conventional motor. Researchers demonstrated this ability by using it to mix fluids with a paddle.
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