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Nickel Alloying Effect on Formation of Cobalt Nanoparticles and Nanowires via Electroless Deposition under a Magnetic Field

机译:镍合金化对磁场下化学沉积形成钴纳米颗粒和纳米线的影响

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摘要

Co-Ni nanowires 40–100 nm in diameter with several dozen µm of length were prepared via electroless deposition under a magnetic field. The formation of Co-Ni nanowires was investigated by an in-situ mixed potential measurement and a cyclic voltammetry combined with a quartz crystal microbalance electrode. These electrochemical measurements revealed that the deposition rate of nickel on nickel is lower than that of cobalt on cobalt. Nickel works as an inhibitor in a growth process of Co-Ni alloys. Thus, the thickness of Co-Ni alloy nanowires is drastically reduced by the addition of Ni(II) in solution. The morphology of Co-Ni nanowires is also strongly affected by the magnetization of Co-Ni alloy nanoparticles which are precursors in the formation of nanowires. Both the magnetization and the deposition rate in Co-Ni alloys are the key parameters to control the aspect ratio and surface morphology of nanowires.
机译:通过在磁场下进行化学沉积,制备了直径为40–100 nm,长度为几十微米的Co-Ni纳米线。通过原位混合电势测量和结合石英晶体微天平电极的循环伏安法研究了Co-Ni纳米线的形成。这些电化学测量表明,镍在镍上的沉积速率低于钴在钴上的沉积速率。镍在Co-Ni合金的生长过程中起抑制剂的作用。因此,通过在溶液中添加Ni(II),大大减少了Co-Ni合金纳米线的厚度。 Co-Ni纳米线的形态也受到Co-Ni合金纳米粒子磁化的强烈影响,而Co-Ni合金纳米粒子是纳米线形成过程中的前体。 Co-Ni合金中的磁化强度和沉积速率都是控制纳米线的长宽比和表面形态的关键参数。

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