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. 2020 Sep 24;20(19):5478. doi: 10.3390/s20195478

Figure 7.

Figure 7

Working principle of an IDE-based gas sensor with a hybrid polymer composite: (a) top view of the gas sensor and the active layer; (b) representation of the polymer matrix with carbon fillers and its electrical characteristics prior to detection; and (c) polymer swell-effect due to the adsorption of VOCs, altering the distribution of fillers and overall impedance/conductivity of the composite [134].