Yellow Tungsten Oxide Nanowires Applied for Gas Sensor

Yellow tungsten oxide nanowires have excellent gas sensitivity so that they are often used to prepare gas sensor. According to the experts, yellow tungsten oxide nanowires and silicon nanowires can be combined to obtain silicon nanowires - tungsten oxide nanowires composite structure, whose interface forms a homogeneous heterojunction. In NO2 gas, the increase of the width of the depletion layer in the heterojunction has an important effect on the improvement of its gas sensing performance.

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Preparation of Silicon Nanowires - Tungsten Oxide Nanowires Composite Structure

Some experts use a combination of metal-assisted chemical etching and nanosphere self-assembly to prepare silicon nanowires with highly ordered arrays on n-type single crystal silicon wafers. Subsequently, a metal tungsten film was deposited on the surface of the silicon nanowires by a magnetron sputtering method, and the silicon nanowires - tungsten oxide nanowires composite structure was prepared by performing heat treatment in a tube furnace.

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