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SnO 2 nanoparticles with small particle size distribution (σ<1.2), and diameters of 10, 15 and 20nm are deposited on platinum interdigital transducers with 2μm finger width and 2μm spacing. Impedance spectroscopy measurements in synthetic air, taken in the temperature range between 100 and 250°C show a clear dependence of the measured impedance on the particle size. Three different contributions...
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