多孔氧化铝样膜自组装有序纳米线阵列的研究

Porous alumina was prepared by anodic oxidation of aluminum. Various factors affecting the size, distribution, morphology and structure of nano-pores of alumina were systematically studied. A variety of arrays of nano-wires and tubes of metals, semi-conductors and carbon were fabricated with the template of porous alumina and their optical, electric, magnetic and catalytic properties were investigated.The alumina film as thick as more than 500 mm has been produced. In the project, we have found: (1) the nano-wires and tubes of semi-conductors, such as CdS、CdSe、TiO2 with the diameter much greater than their corresponding Bohr radius can still show the quantum effects；(2) the nanowire arrays of transition metals of Pt、Pd、Ni、Co、Cu、Ag、Au are well active substrates for SERS；(3)Pt and Pd and Ni nanowire arrays catalyze well the electro oxidation of methanol and NADH and ethanol respectively；(4) TiO2 nanotubes in the form of anatase synthesized from the template of porous alumina manifest themselves super photo catalytic activity in the degradation of sodium dodecyl benzene sulfonate；(5) all the external and internal wall/electrolyte interfaces of the carbon nanotubes will make contributions to the double-layered capacity, showing the carbon nanotube array an important application in the fabrication of super-capacitors.

研究多孔氧化铝自组装金属、半导体有序纳米线阵列及其磁学、光学、电子学、磁电子学等方面的物理特性和在一些电化学反应中的催化作用；研究电流在垂直方向流动(CPP) 的巨磁阻和纳米阵列电极。本课题的开展将有助于自旋阀效应、量子隧道效应等基础研究，有助于磁性垂直记录材料和新型电极研究，有助于我国纳米科学技术和信息科学技术的发展。