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Electrodeposition of Ni-Fe-Co alloy nanowire in modified AAO template

机译:改性AAO模板电沉积Ni-Fe-Co合金纳米线。

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Anodic aluminum oxide (AAO) was used as a template to prepare highly ordered Ni-Fe-Co alloy nanowire arrays. This membrane was fabricated with two-step anodizing method. It is found that there is an optimum barrier thickness to obtain a successful electrodeposition in pores of AAO. The thickness of barrier layer can be modified by additional electrochemical process after completing the anodizing step. Barrier layer thinning can create a rooted structure at the bottom side of the AAO pores and the electrodeposited nanowire arrays. The triple Ni-Fe-Co alloy was deposited in AAO membrane by ac voltage in a simple sulfate bath. The composition of nanowires shows anomalous deposition features between these ions. The difference of Ni2+, Fe2+ and Co2+ ion's diffusion rate can cause composition difference between nanowires that are deposited in membranes with various pore depths and a composition gradient along a single nanowire. (c) 2004 Elsevier B.V. All rights reserved.
机译:阳极氧化铝(AAO)用作模板以制备高度有序的Ni-Fe-Co合金纳米线阵列。该膜用两步阳极氧化法制造。发现在AAO的孔中具有最佳的阻挡层厚度以获得成功的电沉积。在完成阳极氧化步骤之后,可以通过附加的电化学工艺来改变阻挡层的厚度。阻挡层变薄可以在AAO孔和电沉积的纳米线阵列的底部形成有根的结构。在简单的硫酸盐浴中通过交流电压将三重Ni-Fe-Co合金沉积在AAO膜中。纳米线的组成显示了这些离子之间的异常沉积特征。 Ni2 +,Fe2 +和Co2 +离子扩散速率的差异可能会导致沉积在膜中的纳米线之间的成分差异,这些膜具有不同的孔深度和沿着单个纳米线的成分梯度。 (c)2004 Elsevier B.V.保留所有权利。

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