Individual water-filled single-walled carbon nanotubes as hydroelectric power converters

A voltage difference is detected in the generator part of individual water-filled SWNTs when a current is applied on their motor part. It is suggested that the measured voltage difference reveals a newly induced electromotive force, which is generated by a water flow inside the SWNT. The water molecules in the nanotube channel are in turn dragged to flow by the current applied on the motor part.