Tungsten trioxide, or WO3, is usually doped with alkali metals for producing a promising candidate for applications to near-infrared shielding such as office building thermal insulating glass coating. Wherein these doped tungsten trioxide products are known as tungsten bronze nanoparticles (MxWO3, M = Na, Tl, Rb, and Cs).
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According to the experts, the tungsten bronze nanoparticles can be produced by solid state reactions and milling methods with excellent optical properties. The incorporation of the cations inside the WO3 crystal structure also introduces free electrons, which are essential for enhancing the localized surface plasmon resonance. As the localized surface plasmon resonance enhanced, the tungsten bronze nanoparticles such as CsxWO3 nanoparticles will have better absorption of near-infrared light, and the office building thermal insulating glass coating prepared using CsxWO3 nanoparticles as dingal nanoparticles will have better heat shielding performance. So, tungsten trioxide is well known to more and more people.
