Metal Oxides for Chemiresistors

Change of surface charge change of surface potencial change of the concentration of chemisorbed oxygen participated in redox and diffusion [Pg.72]

Structural parameters of metal oxides controlling gas sensing effects [Pg.72]

Dependences illustrating the influence of other structural and morphological parameters of metal oxides on the response of metal oxide gas sensors are shown in Fig. 2.18. These dependences show that as the porosity and active surface area of the gas-sensing material increases, the sensor response [Pg.72]

A key observation on MOX gas sensors is that those chemical surface interactions that lead to a combustive gas response are thermally activated. This fact is apparent in Fig. 2.21, which shows typical responses of a metal oxide-based gas sensor as a function of its operation temperature and adsorption/ [Pg.75]

According to Brynzari et al. (2000), the influence of some adsorption/desorption parameters on the surface potential (AC/s) and SnO conductivity (AG) during CO detection can be presented as the following pattern [Pg.76]

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