多原子物种在均匀和非均匀表面上的多层吸附
Multilayer Adsorption of Polyatomic Species on Homogeneous and Heterogeneous Surfaces
摘要：
在这项工作中，我们研究了多原子物种在均匀和非均匀二元表面上的多层吸附。通过与蒙特卡罗模拟的比较，得到了一个新的近似解析等温线。然后，我们使用著名的Brunauer-Emmet-Teller（BET）方法来分析这些等温线，并估计单层体积，$v_\mathrm{m}$。结果表明，以这种方式获得的$v_\mathrm{m}$的值强烈地依赖于吸附物的尺寸和表面形貌。在所有情况下，我们发现，BET方程的使用导致低估了真正的单层容量。
英文摘要：
In this work we study the multilayer adsorption of polyatomic species on homogeneous and heterogeneous bivariate surfaces. A new approximate analytic isotherm is obtained and validated by comparing with Monte Carlo simulation. Then, we use the well-known Brunauer-Emmet-Teller's (BET) approach to analyze these isotherms and to estimate the monolayer volume, $v_\mathrm{m}$. The results show that the value of the $v_\mathrm{m}$ obtained in this way depends strongly on adsorbate size and surface topography. In all cases, we find that the use of the BET equation leads to an underestimate of the true monolayer capacity.
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