Phase Equilibrium and Nucleation in VLS-Grown Nanowires

被引：62

作者：

Schwalbach, Edwin J. ^{[1
]}

Voorhees, Peter W. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl801987j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Phase diagrams accounting for capillarity and surface stress in VLS-grown nanowires have been calculated, and linearized forms for the compositions of the solid and liquid are given. The solid-vapor interfacial energy causes a significant depression of the liquidus, and the impurity concentration in the wire decreases with decreasing wire diameter. Nucleation calculations give upper bounds on the nucleation temperature and liquid supersaturation during growth that are consistent with measurements in the Au-Ge system.

引用

页码：3739 / 3745

页数：7

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