Synthesis and Properties of Vanadium Oxide Nanostructures by Chemical Vapor Deposition Method

• Main Authors: Chien-Chang Wu, 吳建璋
• Other Authors: Han-Chang Shih
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/36838200522257619581

碩士 === 中國文化大學 === 材料科學與奈米科技研究所 === 98 === In this work, the divanadium pentoxide (V2O5) nanorods and vanadium dioxide (VO2) nanowires have been successfully synthesized on the Si substrates using chemical vapor deposition. In the vanadium pentoxide nanostructures, we also discussed that the effect of temperature for growing vanadium pentoxide nanostructures. The morphology was analyzed by field emission scanning electron microscope (FESEM). The size of the V2O5 nanorods depends on the temperature region of the quartz tube furnace, that is, at higher temperature, the diameters and lengths are 1-4 μm and several μms, respectively, while at lower temperature, they become 100-300 nm and several μms again. And the size of the VO2 nanowires are 50-100 nm in diameters and several μms in lengths. High resolution transmission electron microscopy (HRTEM) indicated that the V2O5 nanorods and VO2 nanowires all are single-crystalline structure. X-ray diffraction (XRD) indicated that the structure of V2O5 nanorods and VO2 nanowires are orthorhombic and monoclinic, respectively. In addition, the components were analysis by energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Cathodoluminescence (CL) indicated that the V2O5 nanorods have a light emission peak at 560 nm。The electrical properties measuring indicated that the conductance of VO2 nanowires are batter than V2O5 nanorods.