Phase Equilibrium and Nucleation in VLS-Grown Nanowires

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• 作者：Edwin J. Schwalbach ; Peter W. Voorhees
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：November 12, 2008
• 年：2008
• 卷：8
• 期：11
• 页码：3739-3745
• 全文大小：236K
• 年卷期：v.8,no.11(November 12, 2008)
• ISSN：1530-6992

文摘

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.