(a) Plot of measured current versus applied voltage (I-V) of the CNTs-based sensor in air and after exposure to constant flow of H2 (concentration, 100%; flow rate, 10 mL/min) at room temperature. (b) Plot of measured current versus applied voltage (I-V) of the CNTs-based sensor in air and after exposure to constant flow of H2 (concentration, 100%; flow rate, 10 mL/min) at 170 [53].
