Advanced Functional Materials · 2008 · 103 citations · 38 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryNanomaterialsNanotechnologyMetal Oxide NanomaterialsMetal OxidesNanomaterial CharacterizationNanosensorsNanowiresOxide SemiconductorsIon DiffusionIon Diffusion MechanismsMetal Oxide Gas SensorsNanowire CharacterizationNanowire SensorsOxygen DiffusionOxygen Diffusion ModelingOxygen Partial Pressure Effects
Abstract The role of oxygen diffusion in the response of individual SnO 2 nanowires to this gas is studied. Different oxygen partial pressures lead to strong changes of their electrical resistance, even at room temperature. Since surface models fail to explain the experimentally observed long‐term resistance transients, it is necessary to make a description of the interaction mechanisms between oxygen species and SnO 2 nanowires by taking ion diffusion into account. Our model correctly describes the experimentally measured dependence of the nanowire resistance with oxygen partial pressure, and it can be applied to the characterization of other metal oxide materials.
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Nanowire Nanosensors for Highly Sensitive and Selective Detection of Biological and Chemical Species
Yi Cui, Qingqiao Wei, Hongkun Park et al. · Science · 2001 · 5.8K citations