Nucleation of a new phase on a surface that is changing irreversibly with time.
Nucleation of a new phase on a surface that is changing irreversibly with time.
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DOI：
10.1103/physreve.89.022405
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发表时间：
2014-01
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影响因子：
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通讯作者：
R. Sear
中科院分区：
文献类型：
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作者：
R. Sear
新相的成核几乎总是从表面开始。这个表面几乎总是假定不随时间变化。然而，表面会变得粗糙，部分溶解，并随着时间的推移发生化学变化。每一种不可逆的变化都会改变表面的成核速率，导致成核速率随时间变化。在这里，我们用一个简单的模型来表明，部分表面溶解可以定性地改变成核过程，这在实验中是可测试的。表面的变化意味着成核速率随时间的增加而增加。有一个初始阶段，在此期间不发生成核，随后是相对较快的成核。
Nucleation of a new phase almost always starts at a surface. This surface is almost always assumed not to change with time. However, surfaces can roughen, partially dissolve, and change chemically with time. Each of these irreversible changes will change the nucleation rate at the surface, resulting in a time-dependent nucleation rate. Here we use a simple model to show that partial surface dissolution can qualitatively change the nucleation process in a way that is testable in experiment. The changing surface means that the nucleation rate is increasing with time. There is an initial period during which no nucleation occurs, followed by relatively rapid nucleation.