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A Novel Mechanism for the Synthesis of Tin / Tin Oxide Nanoparticles of Low Size Dispersion and of Nanostructured SnO2 for the Sensitive Layers of Gas Sensors
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1999
Year
EngineeringGas SensorChemistryNanostructured Sno2Chemical EngineeringNanoengineeringMaterials FabricationSize ReductionNanostructure SynthesisNew ProcedureNanosensorHybrid MaterialsChemical SensorPorous SensorMaterials ScienceNanotechnologyNanomanufacturingGas DetectionIndividual GrainsGas SensorsElectrochemical Gas SensorLow Size DispersionNanomaterialsSurface ScienceFunctional Materials
The resistance of a metal oxide gas sensor varies when the sensor is exposed to oxidizing or reducing gases, thus giving rise to a measurable signal. The most important sensor type with respect to practical application uses SnO2 as the sensitive layer material. In this paper, a new procedure for preparing nanoparticles of SnO2 suitable for gas sensing applications—combining thermolysis of an organometallic precursor with a hydration—is described. Such nanostructures are desirable since the size reduction of individual grains is expected to increase the sensitivity.