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. 2019 Dec 21;20(1):74. doi: 10.3390/s20010074

Figure 2.

Figure 2

Representation of typical analytical signal registered by TiO2-x/TiO2 (400 °C)-based structure. It should be noted that ΔI, the duration of signal development and the regeneration of sensor after measurements were different for different gases and different concentrations of those gases.