Synthesis and growth mechanism of W_(18)O_(49) submicron-rod arrays

The W18O49 submicron-rod arrays were grown on tungsten substrate by vapor deposition using WO3 powders as raw material.The morphology and structure of the resultant tungsten oxide submicron-rods were characterized by scanning electron microscopy,transmission electron microscopy and X-ray diffractometry.Finally,the growth mechanism of the submicron-rod was proposed,and the influence of the temperature on the density and diameter of the submicron-rod arrays was also investigated.The results show that the synthesized W18O49 submicron-rods are a single-crystalline structure with lengths of 5-15 μm and diameters of 200-800 nm.