Cesium tungsten oxide for preparing smart window glass is mainly hexagonal Cs0.33WO3 nanoparticles that could exhibit excellent near-infrared absorption performance with a mean hydrodynamic diameter of about 50 nm as the maximum absorption band was highly sensitive to the particle’s size.
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According to the experts, such a smart window glass of Cs0.33WO3 nano particles could absorb most of the heat radiation under optical illumination and even the sunlight. So, cesium tungsten oxide has received more and more attention in the past decade. While what should be noted is that Cs0.33WO3 nanomaterials not only could be used in the production of transparent heat-shielding products, but is useful for the development of NIR-triggered photothermal conversion materials in biomedicine as they possess excellent NIR photothermal conversion property and stability. And the NIR photothermal conversion-induced temperature increase is enhanced with decreasing particle size or increasing particle concentration.
