磁性金属/导电聚合物多层纳米线阵列的组装及其巨磁电阻性能研究

In accordance with the multilayered film preparation method ,magnetic metal/Conducting polymer multilayered nanowire arrays (Ni/PANI,Ni/polypyrrole) will be fabricated within the pores of an anodic aluminum oxide (AAO) template by pulsed electrodeposition in AAO template. The plating potential will be alternately pulsed between a constant negative potential Vmetal to deposit magnetic metal and a positive potential Vpolymer to get polymer. The microstructure, growth mechanism and giant magnetoresistance properties of multilayered nanowires arrays and the transport properties of single nanowire will be studied by physical methods. The possiblity of direct synthesis for nanoscale devices will be explored through the template method. The results of this study will be helpful to provide fundamental physics information for technical applications in deverse areas such as the magnetic storage media,the weak magnetic field sensors,the new inductive magnetic head and a new generation of spin-electronics devices.

采用控电位双脉冲技术，按照制备纳米多层膜的方法，在AAO模板的纳米孔阵列中控制负向脉冲电沉积磁性金属，而正向脉冲发生电聚合反应，制备镍/聚苯胺、镍/聚吡咯等磁性金属/导电聚合物多层纳米线阵列。研究多层纳米线的微观结构和生长机制，测量巨磁阻特性，同时研究单根多层纳米线的输运特性，探索通过模板法直接合成纳米器件的可能性。为在信息存储、微弱磁场传感器、新型感应磁头和新一代自旋电子学器件等方面的应用奠定基础。

磁性金属/导电聚合物多层纳米线阵列的组装及其巨磁电阻性能研究。本项目根据这一需求出发，开展了基于磁性金属/多层纳米线制备方法及磁性能的研究。经过1年的攻关，本项目完成了预定研究任务，取得了如下的研究成果：组装了磁性金属NI纳米线阵列，具有单晶结构沿<111>晶向生长，有明显的磁各向异性，组装了导电聚合物聚苯胺纳米线阵列；在此基础上，利用控电位双脉冲技术制备聚苯胺/镍多层纳米线阵列，纳米线的直径为70nm，多层结构中各子层厚度均匀，层间界限分明，Ni层平均厚度300nm,PANI层平均厚度80nm,调制波长为380nm左右。在项目资助下，以工作内容为基础，课题组发表一级核心期刊1篇.