synthesized in accordance with previously reported procedures
[31]. The as-synthesized CNT arrays were spun into yarns, also
called fibres, by drawing a CNT bundle from the array. The spinnable
CNT arrays were characterized by making a continuous
bundle by grabbing with tweezers and pulling one side of the
vertically aligned CNTs from the array. To ensure a constant pulling
speed, the bundle was attached to a 8 mm bobbin which was fixed
into the shaft of an electrical motor, whose rotation speed was
controlled by the supplied electrical current. A twist was also
applied to the drawn CNT web as illustrated in Fig. 4a. The typical