侧向扩散对解吸动力学的影响
Effects of Lateral Diffusion on the Dynamics of Desorption
摘要：
在一个简单的格子气模型中，用动力学蒙特卡罗模拟研究了解吸和吸附质侧向扩散同时作用时的吸附质动力学。它被发现，在脱附过程中的覆盖守恒扩散过程的行动有两个不同的，竞争的影响：一般加速的脱附过程中，和通过奥斯特瓦尔德熟化的吸附质配置的粗化。这两种效应之间的平衡取决于解吸过程开始时吸附物层的结构。
英文摘要：
The adsorbate dynamics during simultaneous action of desorption and lateral adsorbate diffusion is studied in a simple lattice-gas model by kinetic Monte Carlo simulations. It is found that the action of the coverage-conserving diffusion process during the course of the desorption has two distinct, competing effects: a general acceleration of the desorption process, and a coarsening of the adsorbate configuration through Ostwald ripening. The balance between these two effects is governed by the structure of the adsorbate layer at the beginning of the desorption process.
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