W18O49亚微米棒阵列的制备及其生长机理

摘要

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.%以WO3粉末为原料,通过气相沉积法在钨片基底上制备出W18O49亚微米棒阵列.采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射分析(XRD)等对制备出的氧化钨亚微米棒阵列进行物相及形貌分析和表征.同时,提出了W18O49亚微米棒的生长机理,并讨论了生长温度对亚微米棒阵列密度和直径的影响.结果表明:制备出的W18O49氧化钨亚微米棒具有单晶单斜结构,长度为5～15μm,直径为200~800 nm,沿[010]方向生长.