Role of the Material Electrodes on Resistive Behaviour of Carbon Nanotube-Based Gas Sensors for H₂S Detection

Figure 4

Curve of the resistance variation (Δ𝑅=𝑅_𝑓−𝑅₀) versus time where 𝑅₀ is the resistance of the sensor exposed to pure N₂, and 𝑅_𝑓 is the maximum value of resistance. The H₂S concentrations (in N₂) are: (a) 10, (b) 20, (c) 40, (d) 60, (e) 80, and (f) 100 ppm, respectively.

(a)

(b)

(c)

(d)

(e)

(f)