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A Possible Oriented Attachment Growth Mechanism for Silver Nanowire Formation

机译：银纳米线形成的可能的定向附着生长机制

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摘要

Electron microscopy studies suggest that silver nanowires prepared by an approach reported earlier by us (Caswell, K. K., Bender, C. M., Murphy, C. J. Nano Lett., 2003, 3, 667-669) form through a coarsening process via an oriented attachment mechanism. Initially, silver nucleation centers were produced by chemical reduction of silver ions in boiling water, with sodium citrate and sodium hydroxide as additives in solution. These nucleation centers, with a twinned crystallographic orientation, ultimately merge into fully grown silver nanowires. This is a completely different mechanism from the seed-mediated growth approach, which has also been used to produce silver nanowires. Companion molecular dynamics performed with the embedded atom method are in agreement with our experimental data.
机译：电子显微镜研究表明，银纳米线是通过我们之前报道的方法制备的（Caswell，K.K.，Bender，C.M.，Murphy，C.J.Nano Lett。，2003，3，667-669）通过定向附着机制通过粗化过程形成。最初，通过在沸水中化学还原银离子，并在溶液中添加柠檬酸钠和氢氧化钠作为添加剂，生成银成核中心。这些成核中心具有孪生的晶体学取向，最终合并为完全生长的银纳米线。这与种子介导的生长方法完全不同，种子介导的生长方法也已用于生产银纳米线。用嵌入原子法进行的同伴分子动力学与我们的实验数据一致。

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