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. 2009 Nov 13;9(11):9029–9038. doi: 10.3390/s91109029

Figure 5.

Figure 5.

Sensitivity of the sensor fabricated using (a) Cd-doped and (b) pristine TiO2-SnO2 powder under a gas concentration of 200 ppm. Note that the sensitivity scale for the doped case is much larger than that for the undoped case.