Review Article

A Review of Carbon Nanotubes-Based Gas Sensors

Figure 31

(a) Schematic diagram of the chemically functionalized carbon nanotubes, which have COOH groups attached along the sidewall of the MWCNTs. (b) The proposed mechanism for alcohol vapour detection using f-CNTs sensors. The COOH groups tend to form hydrogen bonding with the ethanol molecules at room temperature [72].
493904.fig.0031a
(a)
493904.fig.0031b
(b)