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,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.]
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
投稿时间:2016-10-14  修订日期:2017-02-06
中文关键词:  二氧化钒  纳米线  水热法  相变
基金项目:
中文摘要:
      二氧化钒(VO2)在接近室温时发生由半导体态向金属态的Mott相变,在智能窗和红外自适应伪装技术领域具有一定的应用前景。本文采用一种新颖的水热法制备均匀自支撑的VO2纳米线。合成的纳米线的直径为150±30 nm,长度达到几十微米。通过X射线衍射、X射线光电子能谱、高分辨透射电镜和选取电子衍射等手段验证了高纯单斜相VO2纳米线的成功制备。而且,VO2纳米线的可逆相变性能采用差示量热扫描、变温XRD和变温Raman光谱进行了探究。结果表明:VO2纳米线升温相变点为65.2 °C,磁滞回线宽度窄至6.5 °C,具有良好的可逆相变性。这些为VO2纳米线的金属-半导体相变研究提供基础。
Hydrothermal Synthesis and Phase Transition Properties of Uniform Free-standing Vanadium Dioxide Nanowires
英文关键词:Vanadium dioxide, nanowires, hydrothermal, phase transition
英文摘要:
      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.
作者单位E-mail
嵇海宁 国防科技大学新型陶瓷纤维及其复合材料重点实验室 sdytjhn@126.com 
刘东青 国防科技大学新型陶瓷纤维及其复合材料重点实验室  
程海峰 国防科技大学新型陶瓷纤维及其复合材料重点实验室  
张朝阳 国防科技大学新型陶瓷纤维及其复合材料重点实验室  
杨力祥 国防科技大学新型陶瓷纤维及其复合材料重点实验室  
郑文伟 国防科技大学新型陶瓷纤维及其复合材料重点实验室  
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