Capacitive chemosensors are commonly found in two configurations: parallel-plate (PP) and interdigitated electrode (IDE) based on different sensing layers. Metal organic frameworks (MOFs) can play an important role as a dielectric layer of the capacitors because of their insulating properties. However, to date there are few reports on MOFs which were used as a key component of a capacitive sensors. In the limited reports on using MOFs in capacitive sensors, PP configuration was mostly considered. Within the class of MOFs, Cu-BTC (copper:1, 3, 5-benzenetricarboxylate) is a well-studied structure. Although the structure of Cu-BTC has high porosity and large surface area which can improve the sensitivity of IDE capacitive sensors, there are no reports on using this kind of MOF for this purpose. This article is developed in the following order: first, the Cu-BTC nanoparticle is synthesised to make a Cu-BTC sensing layer. The dried Cu-BTC layer is characterized by infrared (IR) spectroscopy, X-ray diff ;raction (XRD) analysis, scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) analysis. These characterization methods confirm the identity of the synthesized material, the nanoscale size of the particles, its VOCs stability and the rigidity of its structure. Secondly, for the first time, Cu-BTC nanoparticles are introduced as a sensing layer in IDE capacitive gas sensors. In order to reduce fabrication costs and time of the conducting elements in IDE configuration, a simple, fast and cost-effective method is introduced which does not need any equipment and pre-treatment for better adhesion. Third, to have a comparative investigation between the sensing performance of IDE and PP capacitive sensors, their performance in detection of some VOCs vapours is examined. Subsequently, the selectivity, recovery time, reproducibility, repeatability and reversibility, sensitivity and limit of detection (LOD) of the IDE and PP capacitive sensors are studied for detection of some VOCs such as acetone, toluene and dichloromethane with different dielectric constants. All experiments were carried out at different concentrations (250–1500 ppm) of VOCs in ambient conditions (atmospheric pressure, 25 ℃ and 10% relative humidity).

电容式化学传感器通常有两种配置：基于不同传感层的平行板（PP）和叉指电极（IDE）。金属有机骨架（MOF）由于其绝缘特性，可以作为电容器的介电层发挥重要作用。但是，迄今为止，关于MOF用作电容式传感器的关键组件的报道很少。在有关在电容式传感器中使用MOF的有限报告中，主要考虑了PP配置。在MOF类别中，Cu-BTC（铜：1、3、5-苯三羧酸酯）是一种经过充分研究的结构。尽管Cu-BTC的结构具有较高的孔隙率和较大的表面积，可以提高IDE电容式传感器的灵敏度，但尚未有为此目的使用这种MOF的报道。本文按以下顺序开发：首先，合成Cu-BTC纳米颗粒以制备Cu-BTC感测层。干燥的Cu-BTC层的特征在于红外（IR）光谱，X射线衍射（XRD）分析，扫描电子显微镜（SEM）和Brunauer-Emmett-Teller（BET）分析。这些表征方法证实了合成材料的身份，颗粒的纳米级尺寸，其VOC的稳定性以及其结构的刚性。其次，首次将Cu-BTC纳米颗粒引入IDE电容式气体传感器中作为传感层。为了减少IDE配置中的导电元件的制造成本和时间，引入了一种简单，快速且具有成本效益的方法，该方法不需要任何设备和预处理即可获得更好的附着力。第三，为了对IDE和PP电容式传感器的感测性能进行比较研究，检查了它们在检测某些VOC蒸气中的性能。随后，研究了IDE和PP电容式传感器的选择性，恢复时间，重现性，可重复性和可逆性，灵敏度和检测极限（LOD），以检测具有不同介电常数的某些VOC，例如丙酮，甲苯和二氯甲烷。所有实验均在环境条件（大气压，25℃和10％相对湿度）下以不同浓度（250-1500 ppm）的VOC进行。研究了IDE和PP电容式传感器的灵敏度和检测限（LOD），以检测具有不同介电常数的某些VOC，例如丙酮，甲苯和二氯甲烷。所有实验均在环境条件（大气压，25℃和10％相对湿度）下以不同浓度（250-1500 ppm）的VOC进行。研究了IDE和PP电容式传感器的灵敏度和检测限（LOD），以检测具有不同介电常数的某些VOC，例如丙酮，甲苯和二氯甲烷。所有实验均在环境条件（大气压，25℃和10％相对湿度）下以不同浓度（250-1500 ppm）的VOC进行。