Figure 3. Electrical properties of the DWNT cables.
(a) The resistivity as a function of diameter for 34 raw DWNT cables and 15 iodine doped cables. (b) A comparison in specific conductivity among raw, doped cables and several metals. Ra and Rh represent for the average and the highest one for the raw cables. Da and Dh are the values for the doped cables. (c) The relative resistance as a function of temperature. (d) The resistance as a function of temperature for two doped cables. The thermal treatment for the cable of 10.2 μm in diameter is continuous, but for the cable of 5.9 μm in diameter, after the 2nd run of the heating process, the temperature was held at 420 k for 4 hrs, and then continued with the 3rd run.