期刊
CHEMICAL PHYSICS LETTERS
卷 447, 期 4-6, 页码 310-315出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.09.047
关键词
-
In this Letter, we investigate, using molecular dynamics simulations, the diffusion of n-octane and n-tetradecane on a graphite surface at 300 K under incomplete coverage condition. For both molecules, we observe that the lateral diffusion coefficient exhibits a Lambda-shape anomaly with surface coverage i.e., the diffusion coefficient increases with the increase in surface coverage until a critical surface coverage, beyond which the diffusion coefficient decreases. Moreover, for low surface coverages, the longer n-tetradecane molecule moves faster compared to the shorter n-octane molecule and for high surface coverages, the n-octane molecule moves faster. We develop a new theory to understand the surface diffusion of n-alkanes and show that D similar to r(2)cc/N(P)t(R). (C) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据