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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,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
Foundation item:
Author NameAffiliationE-mail
Haining Ji Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology sdytjhn@126.com 
Dongqing Liu Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology  
Haifeng Cheng Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology  
Chaoyang Zhang Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology  
Lixiang Yang Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology  
Wenwei Zheng Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,National University of Defense Technology  
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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.