Figure 6
Reversible and reproducible responses are measured with various populations of FPNCs_CG at a constant current value (10−4 A).
Nomalized resistance changes at room temperature upon (a) sequential exposure to H2 gas of various concentrations (0.1 to 100 ppm) and (b) periodic exposure to H2 gas (10 ppm) of Pristine CG (green), FPNCs_CG_L (black), FPNCs_CG_M (blue) and FPNCs_CG_H (red), respectively. (c) Sensitivity as a function of square root of H2 concentration, (d) response time and rate (inset) as a variation of H2 concentration.
