Tungsten Oxides Particle Morphology and Size

Through color electron microscopy observing the shape and size of the tungsten oxides found different phase component tungsten oxides have different particle morphology and size. Violet tungsten oxide (VTO) particles are rod-shaped, and the rest of the tungsten oxides particles morphology is nearly spherical. VTO particle size are large than other tungsten particle size. The blue tungsten oxide (BTO) which the main phase is ATB has minimum particle when compare to other tungsten oxides. Using electron diffraction pattern found violet tungsten oxide is single crystal particles, while the other was a polycrystalline particle. Where rod-shaped VTO length has several microns and cross-sectional dimensions is about 100 ~ 200nm. In the primary phase of ATB BTO particle cross-sectional dimensions is about 10nm. WO₂₀O₅₈ main phase of BTO particle cross-sectional dimensions is about 40nm which is similar to WO₃ particle cross-sectional dimensions. From the degree of aggregation between the particles, the smallest gap between the particles is ATB. The microscopic particle size of the tungsten oxide and its macroscopic FSSS size compared to, we can see that the two are not related links.

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