离子液体中电沉积制备钴纳米线阵列

Electrodeposition of Cobalt Nanowires Array from an Ionic Liquid

从20世纪90年代开始,采用模板法组装各种纳米线成为一种非常有吸引力的纳米结构材料的合成方法。模板的种类很多,如多孔阳极氧化铝膜、聚碳酸酯膜、多孔硅、碳纳米管模板等，其中多孔阳极氧化铝（PAA）由于具有高度有序的纳米级柱状孔阵列结构．孔径及膜厚可以通过调整阳极氧化参数进行调控．同时又具有较好的热稳定性和化学稳定性而成为理想的模板材料．在制备垂直磁记录材料、光电元件、电子器件等方面得到广泛的应用．并取得了一些研究成果。

Porous anodic alumina （PAA） was used as a template to prepare Co nanowires array from 1-ethyl-3-methylimidazolium chloride ionic liquid by direct current method. The surface morphology of porous anodic alumina template was observed by field emission-scanning tunneling microscopy （FE-SEM） before and after the electrodeposition of Co nanowires. The electrodeposition of Co nanowires was characterized by transmission electron microscopy （TEM） and X-ray powder diffraction （XRD）. TEM results indicate that the Co nanowire surface is coarse and porous when aqueous solution was used as electrolyte, and the Co nanowire deposited from the ionic liquid is uniform and smooth. XRD results show that the electrodeposition of Co is a mixture of crystal and microcrystal phase.