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以多孔氧化铝为模板,三嵌段共聚物F127(EO108PO69EO108,EO:ethylene oxide,PO:propylene oxide)为添加剂,采用电化学沉积技术,制备了高度有序的磁性金属镍纳米管阵列.该合成方法简单、有效、易操作,特别是,氧化铝模板的孔壁不需要进行任何修饰.通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射(XRD)和振动样品磁强计(VSM)对产物的形貌、结构和磁学性质进行表征.X射线衍射(XRD)分析表明,产物的晶型结构为面心立方.利用透射电子显微镜研究了实验参数,如电流密度、共聚物浓度和电沉积时间,对产物形貌的影响,结果表明,镍纳米管的管壁厚度随着电流密度增大和电沉积时间的延长而变大,但几乎不受F127浓度变化的影响.以上的实验表明,调节实验参数,可以有效控制纳米管管壁的厚度.磁性研究结果表明,与块体镍相比较,镍纳米管阵列表现出较大的矫顽力.
A highly ordered magnetic metal-nickel nanotube array was prepared by electrochemical deposition technique using porous alumina as template and triblock copolymer F127 (EO108PO69EO108, PO: propylene oxide) as additive The method is simple, effective and easy to operate. In particular, the pore wall of the alumina template does not need to be modified. The structure of the alumina template is characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (VSM) was used to characterize the morphology, structure and magnetic properties of the product. X-ray diffraction (XRD) analysis showed that the crystal structure of the product was face centered cubic. The experimental parameters such as current density, copolymerization The results show that the wall thickness of nickel nanotubes increases with the increase of current density and electrodeposition time, but it is hardly affected by the change of F127 concentration. The experimental results show that the experimental parameters can effectively control the thickness of the nanotube wall, and the results of the magnetic study show that the nickel nanotube array shows a larger coercive force than the bulk nickel.