One-Dimensional Tin (IV) Oxide Nanostructures as Gas-Sensing Materials
Keywords:Semiconductor sensor, Tin (IV) oxide, One-dimensional nanostructures, Vapor transport method, Additive
Background. Gas sensors based on SnO2 are characterized by small size and low cost. However, its significant disadvantages are insufficient sensitivity, small selectivity and low stability. Therefore, the determination of basic parameters, a change that will create effective, highly sensitive and selective semiconductor sensors based on SnO2 nanostructures, is extremely important.
Objective. The purpose of this paper is to establish the main parameters affecting the sensitivity, selectivity and stability of semiconductor sensors.
Methods. A critical review of recent scientific literature is done. Found that the usage of 1D tin (IV) oxide nanostructures (as pure and doped) will increase the sensitivity and selectivity of the metal oxide sensors due to high values of surface to volume ratio and the creation of active centers in relation to the detected gases.
Results. It was determined that the creation of efficient and sensitive semiconductor sensors requires the use of 1D SnO2 nanostructures and their directed modification by various additives.Conclusions.In terms of data presented in contemporary scientific literature, to create effective semiconductor tin (IV) oxide based sensors 3S parameters of these sensors need to be improved. From this point of view, 1D SnO2 nanostructures deserve special attention due to the totality of their physical and chemical properties. Vapor transport method (method CVD) is enough effective for the synthesis of 1D nanostructures. It secures superior performance in conjunction with relative simplicity and availability. And this method allows us to obtain single-crystal nanostructures of controlled morphology. However, as of day there is no almost information on the impact of operational parameters of CVD synthesis on physico-chemical characteristics of obtained nanosized SnO2. Therefore, the advanced study of scientific bases of purposeful synthesis and systematization of approach in the selection a dopant to increase selectivity of metal oxide gas sensors is the main task.
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