Cesium tungsten bronze nanopowder, as a small size functional nanomaterial, is mainly applied for preparing sun room thermal insulating film. And the prepared smart film is often used to the sun room with a lot of glasses, thereby cooling the glass room and reducing energy consumption. According to the experts, the cesium tungsten bronze (CsxWO3) is a reduced compound, and there are W5+ and W6+. Also, it is the co-existence of W5+ and W6+ that makes the CsxWO3 show excellent near-infrared shielding performance.

Cesium tungsten bronze nanopowder for preparing office building thermal insulating film shows a strong near-infrared optical absorption and a high visible light transmittance. In recent years, the experts found that CsxWO3 nanocrystals displayed strong near-infrared optical absorption with a high molar extinction coefficient, thus generated significant amounts of heat upon excitation with near-infrared light.

Cesium tungsten bronze nanopowder is regarded as the best functional material for preparing nano heat insulating film as it has strong near-infrared optical absorption with the wavelength in the range of 780-2500 nm. Also, the cesium tungsten bronze (CsxWO3) is a novel NIR absorbent for PTA treatment of human cancer. The experts have developed PEGylated homogeneous CsxWO3 nanorods with broad photo-absorption (780-2500 nm).

Cesium tungsten bronze nanopowder has great potential in the preparation of nano heat insulating coating. And it is a new type of thermal insulation coating that is expected to replace ITO coatings. It is reported that the Cs0.33WO3 nanoparticles have the hexagonal structure. And owing to the free electrons or polarons, the Cs0.33WO3 nanoparticles exhibited a strong absorption property in the near-infrared (NIR) region.