通过静电纺丝制备了定向排列的0.5(Ba_(0.7)Ca_(0.3))TiO_3-0.5Ba(Zr_(0.2)Ti_(0.8))O_3(BCZT)纳米线,并利用纳米线制备了纳米发电机。研究了定向排列纳米线对纳米发电机输出性能的影响。X射线粉末衍射谱和拉曼光谱显示:制备的纳米线具...通过静电纺丝制备了定向排列的0.5(Ba_(0.7)Ca_(0.3))TiO_3-0.5Ba(Zr_(0.2)Ti_(0.8))O_3(BCZT)纳米线,并利用纳米线制备了纳米发电机。研究了定向排列纳米线对纳米发电机输出性能的影响。X射线粉末衍射谱和拉曼光谱显示:制备的纳米线具有良好的四方相钙钛矿结构。扫描电子显微镜照片显示,利用平行电极收集器可以实现大部分纳米线的定向排列。测试了纳米发电机的压电性能,结果显示:基于定向排列纳米线的纳米发电机平均输出电流为89.69 n A,而基于无序排列纳米线的纳米发电机平均输出电流为52.36 n A。相比而言,发电机的电流输出性能提升了71.3%。利用发电机制备的自供电式可穿戴肢体动作传感器响应非常好,能在不需要外部电源的情况下很好地区分不同肢体部位的弯曲动作。展开更多
Microstructural characteristics in the BaSrNb0.3Ti0.7O3 thin film, grown on SrTiO3 substrate by computercontrolled laser molecular beam epitaxy, were characterized by means of transmission electron microscopy （TEM）....Microstructural characteristics in the BaSrNb0.3Ti0.7O3 thin film, grown on SrTiO3 substrate by computercontrolled laser molecular beam epitaxy, were characterized by means of transmission electron microscopy （TEM）. It is found that the film is single-crystallized and epitaxially grown on the SrTiO3 substrate forming a flat and distinct interface. Anti-phase domains were identified, and the crystallographic features of mismatch dislocations at the interface between film and substrate were clarified. The high conductivity of the present film was discussed from the viewpoint of Nb dopant and the nitrogen atmosphere.展开更多
文摘通过静电纺丝制备了定向排列的0.5(Ba_(0.7)Ca_(0.3))TiO_3-0.5Ba(Zr_(0.2)Ti_(0.8))O_3(BCZT)纳米线,并利用纳米线制备了纳米发电机。研究了定向排列纳米线对纳米发电机输出性能的影响。X射线粉末衍射谱和拉曼光谱显示:制备的纳米线具有良好的四方相钙钛矿结构。扫描电子显微镜照片显示,利用平行电极收集器可以实现大部分纳米线的定向排列。测试了纳米发电机的压电性能,结果显示:基于定向排列纳米线的纳米发电机平均输出电流为89.69 n A,而基于无序排列纳米线的纳米发电机平均输出电流为52.36 n A。相比而言,发电机的电流输出性能提升了71.3%。利用发电机制备的自供电式可穿戴肢体动作传感器响应非常好,能在不需要外部电源的情况下很好地区分不同肢体部位的弯曲动作。
基金supported by the National Natural Science Foundation of China under Grant No.50325101the Special Funds for the Major State Basic Research Projects of China(Grant No.2002CB613503).
文摘Microstructural characteristics in the BaSrNb0.3Ti0.7O3 thin film, grown on SrTiO3 substrate by computercontrolled laser molecular beam epitaxy, were characterized by means of transmission electron microscopy （TEM）. It is found that the film is single-crystallized and epitaxially grown on the SrTiO3 substrate forming a flat and distinct interface. Anti-phase domains were identified, and the crystallographic features of mismatch dislocations at the interface between film and substrate were clarified. The high conductivity of the present film was discussed from the viewpoint of Nb dopant and the nitrogen atmosphere.
