模板法电沉积钆钴合金纳米线阵列

Electrodeposition of Gd-Co Alloy Nanowire Arrays by AAO Template

摘要:

在草酸电解液中用二次阳极氧化法制备多孔阳极化氧化铝(Anodic Aluminum Oxide, AAO)模板。通过对电流密度、氧化时间、电解液浓度等参数的调整，最终获得孔洞分布均匀、孔径基本一致、孔口呈六边形的AAO模板。采用不去除中间铝，用逐级降压法和电化学法减薄阻挡层，然后利用中间铝作为电极，在非水体系中以AAO为模板，直流电沉积钆钴合金纳米线阵列。经过SEM观测，AAO模板孔径在60 nm左右，去阻挡层前后变化不大，制备的钆钴合金纳米线排列有序、尺寸一致；EDS测定表明纳米线为钆钴合金及少量氧化物纳米线，钆钴摩尔质量比为1:7.5，钆钴合金质量分数为90.66%；XRD分析图谱表明所得到的钆钴合金纳米线为非晶态

Abstract:

A two-step anodic oxidation process was used to prepare porous anodic aluminum oxide (AAO) template in oxalic acid electrolyte. By adjusting technological parameters including current density, oxidation time and electrolyte concentration, the AAO template possessed of uniformly distributed holes, similar aperture and hexagonal orifice was obtained. Meanwhile, by removing the barrier layer without peeling the film, the residual aluminum became basement and functioned as electrode. In the non-aqueous system, the nanowire array of Gd-Co alloy was prepared by DC electrodeposition in the AAO template. Through the observation of SEM, the aperture of AAO template is approximately 60 nm, and it changes little before and after removing the barrier layer. The prepared Gd-Co alloy nanowire is orderly and in the similar size. EDS measurement shows that nanowires are of Gd-Co alloy and a few oxides, in which Gd-Co alloy content is 90.66wt%, and the mole ratio of Gd to Co is 1:7.5. XRD analysis displays that the nanowire of Gd-Co alloy is noncrystal.