Patent ID: 8668896

Claim:
A method for making a twisted carbon nanotube wire, the method comprising: providing at least one carbon nanotube film comprising a plurality of carbon nanotubes joined end-to-end by van der Waals attractive force therebetween and aligned along a same direction; fixing two opposite ends of the at least one carbon nanotube film to two fixing elements and pulling the two fixing elements along two reversed directions by a pulling force parallel to a surface of the at least one carbon nanotube film to stretch the at least one carbon nanotube film, a value of the pulling force (F) and a width (W) of the at least one carbon nanotube film is satisfied by a relation of 0.005 Newton/centimeter<F/W<0.02 Newton/centimeter; and twisting the at least one carbon nanotube film by rotating at least one of the two fixing elements while the at least one carbon nanotube film is still pulled by the pulling force.