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arXiv 0802.2226cond-mat.stat-mech
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吸附-脱附动力学:一个经典问题的评述

Adsorption-Desorption Kinetics: A Review of a Classical Problem

S. Manzi, R. E. Belardinelli, G. Costanza, V. D. Pereyra

摘要:

本文在格子气模型的框架下分析了吸附-脱附动力学。我们已经证明,代表跃迁几率的系数必须仔细选择,即使它们满足细致平衡的原则,否则由动力学引起的观测量呈现反常行为。我们已经证明,当吸附$A_i$和解吸$D_i$系数通过参数$γ$线性相关时,存在导致动力学中不良行为的横向相互作用值$V$。我们已经给出了$V$和$γ$允许值的相图,得出的结论是,细致平衡并不能保证从速率方程获得的观测值的正确物理行为,如吸附等温线,粘附系数和热脱附光谱。或者,我们已经介绍了一个描述的吸附-解吸过程的基础上,一个简单的,但一致的精力充沛的论点,导致一个正确的行为的观测没有物理上的不一致。

英文摘要:

In this work we have analyzed the adsorption-desorption kinetics in the framework of the lattice gas model. We have shown that the coefficients representing the transition probabilities must be carefully chosen even when they fulfill the principle of detailed balance, otherwise the observables arising from the kinetics present anomalous behavior. We have demonstrated that when the adsorption $A_i$ and desorption $D_i$ coefficients are linearly related through a parameter $γ$, there are values of lateral interaction, $V$, that lead to bad behavior in the kinetics. We have shown a phase diagram for the allowed values of $V$ and $γ$, concluding that detailed balance does not guarantee a correct physical behavior of the observables obtained from the rate equations like adsorption isotherms, sticking coefficients and thermal desorption spectra. Alternatively, we have introduced a description of the adsorption-desorption processes based in a simple but consistent energetic argument that leads to a correct behavior of the observables without physical inconsistencies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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