We propose a new drive mechanism for carbon nanotube (CNT) motors, based uponthe torque generated by a flux of electrons passing through a chiral nanotube.The structure of interest comprises a double-walled CNT, formed from, forexample, an achiral outer tube encompassing a chiral inner tube. Through adetailed analysis of electrons passing through such a "windmill", we find thatthe current due to a potential difference applied to the outer CNT generatessufficient torque to overcome the static and dynamic frictional forces thatexists between the inner and outer walls, thereby causing the inner tube torotate.
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