Yellow tungsten oxide nanocomposite film may be a nanocomposite film of polyainline (PANI) and tungsten trioxide (WO3), which may be fabricated by electropolymerization of aniline monomers onto WO3 coated ITO glass slides through spin coating technique and followed by annealing at 500 °C for 2h.

Yellow tungsten oxide nanowires are considered to be the most promising semiconductor gas-sensing material, which can be used to prepare NO2 gas sensors. As we all know, air pollution is an important aspect of environmental pollution, and NO2 gas in the air will cause serious damage to human body. Therefore, the preparation of a gas sensor that can work at room temperature with low energy consumption and high sensitivity has attracted the attention of many researchers.

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.

Yellow tungsten oxide for smart dimming glass is tungsten trioxide - an electrochromic material that is considered to be one of the most promising smart materials. Among many electrochromic materials, as the most common inorganic cathode electrochromic material, yellow tungsten oxide has the advantages of being cheap, non-toxic and stable with superior performance so that it has received wide attention.