Organic films were widely found on indoor impermeable surfaces exposed to gaseous organic compounds, but few studies have addressed the film growth details on different indoor substrates. In this study, we observed the topography evolution of phthalic acid ester (PAE) organic films on three impermeable substrates: polished glass (G-P), mirror-polished stainless steel (SS-M) and drawn stainless steel (SS-D). PAE organic films were preferentially formed upon the flat surface with sparse inherent nano-peaks of substrate G-P and in valleys of substrate SS-M and SS-D. Surface uniformity of substrates and viscosity of PAE molecules were inferred as critical parameters determining the surface average adhesion forces. We obtained the partition coefficients of DEP, DnBP, BBP and DEHP on substrate G-P, SS-M and SS-D by fitting the initial monolayer adsorption process. Organic films continuously grew instead of reaching adsorption equilibrium after long-term PAE exposure, indicating that multilayer adsorption may occur. The organic film growth rates in saturated gas-phase PAE concentrations were quantified as about one-tenth of the results in previous studies where substrates were simultaneously exposed to multiple pollutants. To sum up, the results outline PAE adsorption details on impermeable materials and provide a reference for better estimation on PAE exposure assessment.

有机薄膜广泛存在于暴露于气态有机化合物的室内不透水表面上，但很少有研究涉及不同室内基材上的薄膜生长细节。在这项研究中，我们观察了邻苯二甲酸酯 (PAE) 有机薄膜在三种不透水基材上的形貌演变：抛光玻璃 (GP)、镜面抛光不锈钢 (SS-M) 和拉制不锈钢 (SS-D)。PAE有机薄膜优先形成在基板GP的固有纳米峰稀疏的平坦表面上以及基板SS-M和SS-D的谷中。基材的表面均匀性和 PAE 分子的粘度被推断为决定表面平均粘附力的关键参数。我们得到了 DEP、DnBP、BBP 和 DEHP 在底物 GP 上的分配系数，SS-M 和 SS-D 通过拟合初始单层吸附过程。有机膜在长期暴露于PAE后持续生长而不是达到吸附平衡，表明可能发生多层吸附。饱和气相 PAE 浓度下的有机膜生长速率被量化为先前研究中基质同时暴露于多种污染物的结果的十分之一。综上所述，结果概述了不透水材料上 PAE 的吸附细节，并为更好地估计 PAE 暴露评估提供了参考。饱和气相 PAE 浓度下的有机膜生长速率被量化为先前研究中基质同时暴露于多种污染物的结果的十分之一。综上所述，结果概述了不透水材料上 PAE 的吸附细节，并为更好地估计 PAE 暴露评估提供了参考。饱和气相 PAE 浓度下的有机膜生长速率被量化为先前研究中基质同时暴露于多种污染物的结果的十分之一。综上所述，结果概述了不透水材料上 PAE 的吸附细节，并为更好地估计 PAE 暴露评估提供了参考。