(a)
(b)
Figure 5: (a) Measured direct electrical currents (in mA) at constant voltage in composite films (no CNTs, low CNTs, and high CNTs groups) immersed in culture medium. for high CNTs versus low CNTs and no CNTs at currents from 6 to 10 min time points (horizontal line). (b) Electrical conductivity (in mS/m) derived from 1 per system resistance and electrodes distance.