Electrical gas sensors

In this section, the performances of electrical gas sensors based on SWCNTs are reviewed. Three types of gas sensors are introduced field-effect transistor based on individual SWCNT and chemiresistor or field-effect transistor based on SWCNT network. 

Table 1 Main architectures of porous silicon electrical gas sensors since 1990... 

The most common gas sensors are electrical gas sensors, which are classified as potentiometric, amperometric, impedimetric, and conductometric, depending on which electrical signal is measured (voltage, current at a fixed applied potential, current at a sinusoidal applied potential, or resistance). Metal oxides, on which this chapter is focused, are typical conductometric gas sensors, and will be described later in more detail. 

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