The melting temperature of nanorods: diameter and length dependences
The melting temperature of nanorods: diameter and length dependences
复制标题
纳米棒的熔化温度：直径和长度依赖性
DOI：
10.1039/d0cp02091e
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发表时间：
2020
影响因子：
3.3
通讯作者：
Li Ming
中科院分区：
文献类型：
--
作者：
Zhang Zhengming;Meng Xianshang;Lu Haiming;Li Ming
从吉布斯自由能和尺寸依赖的界面能的角度提出了纳米棒的直径和长度依赖的熔化温度Tm（D，L）的热力学模型，其中D和L表示纳米棒的直径和长度。如模型所描述的，Tm（D，L）随着D和L的减小而减小，其中直径效应占主导地位，而长度效应是次要的。模型预测和可用的实验和分子动力学模拟结果之间的协议可以发现Sn和Cu纳米棒，这使我们能够确定MnBi纳米棒的磁结构转变温度的大小依赖性。该工作对纳米器件的设计和应用具有一定的指导意义。
A thermodynamic model for the diameter- and length-dependent melting temperature Tm(D,L) of nanorods has been proposed from the perspective of the Gibbs free energy together with the size-dependent interface energy, where D and L denote the diameter and the length of the nanorods. As the model describes, Tm(D,L) decreases with a decrease in D and L, where the diameter effect is dominant while the length effect is secondary. Agreements between model predictions and the available experimental and molecular dynamics simulation results can be found for Sn and Cu nanorods, which enabled us to determine the size dependence of the magnetostructural transition temperature in MnBi nanorods. This work is helpful for the design and application of nanoscale devices.