Abstract This study aimed at improving the sensing properties of polymer-based gas sensors by controlling the surface adsorption. For this purpose, a polymer was produced as a Langmuir–Blodgett (LB) thin film chemical gas sensor element. The polymer material used was characterized by FTIR, 1 H and 13 C NMR analyses. All LB thin film layers were characterized by UV–Vis spectroscopy, scanning electron microscopy (SEM), quartz crystal microbalance (QCM) and atomic force microscopy (AFM) techniques. The polymeric chemical sensor was exposed to four different harmful organic vapours using QCM. The diffusion coefficients were calculated for each organic vapour using the short time approximation of the Fick’s second diffusion law. The results showed that the response of the polymeric LB films to the harmful vapours was large, fast and reversible and the diffusion coefficients were found to increase in the order dichloromethane, chloroform, benzene and toluene at room temperature. Graphic abstract

中文翻译：

---

通过主客体原理改进基于聚合物的气体传感器的传感特性

摘要 本研究旨在通过控制表面吸附来提高聚合物基气体传感器的传感性能。为此，生产了一种聚合物作为 Langmuir-Blodgett (LB) 薄膜化学气体传感器元件。使用的聚合物材料通过 FTIR、 1 H 和 13 C NMR 分析表征。所有 LB 薄膜层均通过 UV-Vis 光谱、扫描电子显微镜 (SEM)、石英晶体微量天平 (QCM) 和原子力显微镜 (AFM) 技术进行表征。使用 QCM 将聚合物化学传感器暴露于四种不同的有害有机蒸气中。使用菲克第二扩散定律的短时间近似计算每种有机蒸气的扩散系数。结果表明聚合物LB薄膜对有害蒸汽的响应大，快速且可逆，并且发现扩散系数在室温下按二氯甲烷、氯仿、苯和甲苯的顺序增加。图形摘要