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嵇海宁,刘东青,程海峰,张朝阳,杨力祥,郑文伟.均匀自支撑的二氧化钒纳米线的水热合成及相变特性研究[J].稀有金属材料与工程(英文),2017,46(12):3601~3605.[Haining Ji,Dongqing Liu,Haifeng Cheng,Chaoyang Zhang,Lixiang Yang and Wenwei Zheng.Hydrothermal Synthesis and Phase Transition Properties of Uniform Free-standing Vanadium Dioxide Nanowires[J].Rare Metal Materials and Engineering,2017,46(12):3601~3605.]
Hydrothermal Synthesis and Phase Transition Properties of Uniform Free-standing Vanadium Dioxide Nanowires
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Received:October 14, 2016  Revised:February 06, 2017
DOI:
Key words: Vanadium dioxide, nanowires, hydrothermal, phase transition
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Haining Ji,Dongqing Liu,Haifeng Cheng,Chaoyang Zhang,Lixiang Yang and Wenwei Zheng  
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Abstract:
      Vanadium dioxide (VO2) undergoes a Mott metal-insulator transition (MIT) close to room temperature, and has been suggested as a candidate for use in smart window and adaptive infrared camouflage. Here we report the synthesis of uniform free-standing VO2 nanowires using a novel hydrothermal method. The synthetic nanowires have typical diameters of 150±30 nm and lengths of tens of micrometer. These VO2 nanowires exhibit high crystallinity and feature a pure monoclinic phase and composition characterized by X-ray diffraction, X-ray photoelectron spectroscopy, high resolution transmission electron microscopy and selected area electron diffraction. Moreover, reversible phase transition properties of VO2 nanowires are monitored via differential scanning calorimetry, variable temperature X-ray diffraction and temperature-dependent Raman spectroscopy. The results show VO2 nanowires obtained exhibit a reversible phase transition with an endothermic phase transition at 65.2 °C and a narrow hysteresis width of 6.5 °C. These VO2 nanowires should provide promising materials for fundamental investigations of nanoscale metal-insulator transitions.