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Modeling the relationship between melting point of a metal nanowire and its cap surface curvature

机译:建模金属纳米线的熔点与帽表面曲率的关系

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摘要

It is of practical importance to predict the melting point of metal nanowires in a confined environment. Based on molecular dynamics (MD) simulations, a universal model unravelling the relationship between the melting point of a metal nanowire in nanoconfinement and its cap surface curvature has been developed for the first time. The results have demonstrated that both the interaction strength between the nanowire and the nanoconfinement and the diameter of nanoconfinement dramatically affect the melting point of the embedded nanowire. These phenomena can be further expressed in a mathematical formula directly describing the curvature-dependent melting point. It is also found that the melting feature of the metal nanowire under weak interaction is quite different from that under strong interaction. Furthermore, the melting point of the free cluster can also be predicted using this model. Our findings have provided a direct way to analyze the melting point via the observed morphology of the metal nanoparticle.
机译:预测狭窄环境中金属纳米线的熔点是实际重要的。基于分子动力学(MD)模拟,首次开发了揭开金属纳米线中金属纳米线的熔点与其盖表面曲率之间的关系的通用模型。结果表明,纳米线和纳米序之间的相互作用强度均显着影响嵌入纳米线的熔点。这些现象可以在直接描述曲率依赖性熔点的数学公式中进一步表达。还发现,在弱相互作用下,金属纳米线的熔化特征与强相互作用的熔化特征完全不同。此外,还可以使用该模型预测自由簇的熔点。我们的研究结果提供了一种直接方法来通过观察到的金属纳米粒子的形态来分析熔点。

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  • 来源
    《RSC Advances》 |2016年第46期|共6页
  • 作者

    Jiang Y.; Zhang K.;

  • 作者单位

    Univ New S Wales Sch Chem Engn Ctr Adv Macromol Design Kensington NSW 2052 Australia;

    Chinese Acad Sci Inst Mech Key Lab Micrograv Natl Micrograv Lab Beijing 100190 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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