薄膜基荧光气体传感器中的涂层化学  

Adlayer Chemistry on Film-based Fluorescent Gas Sensors

作　　者：刘太宏[1] 苗荣 彭浩南 刘静[1] 丁立平[1] 房喻[1] Taihong Liu;Rong Miao;Haonan Peng;Jing Liu;Liping Ding;Yu Fang(Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education,School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119,P.R.China)

机构地区：[1]陕西师范大学化学化工学院,应用表面与胶体化学教育部重点实验室,西安710119

出　　处：《物理化学学报》2020年第10期17-28,共12页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(21527802,21673133,201820102005);高等学校学科创新引智计划(B14041);长江学者与创新团队发展计划(IRT-14R33);陕西省自然科学基础研究计划(2019JM-404);中央高校基本科研业务费专项(GK201803024);陕西高校青年创新团队资助项目。

摘　　要：近年来,高性能薄膜基气体传感器的研制备受关注,所涉及的涂层化学已经成为物理化学学科发展的一个热点。传感因分析物与敏感层(涂层)物质相互作用引起薄膜特定静态及动态物理量变化而实现,因此,薄膜传感性能势必受到敏感层物质种类和敏感层微纳结构等因素影响。就薄膜基荧光传感而言,荧光敏感物质的结构和性质对薄膜传感性能起着至关重要的作用。同时,因毛细凝结、色谱效应、尺寸效应、分子间相互作用等因素的存在,敏感层微观结构也极大地影响着薄膜的传感性能。本文结合课题组近期研究工作,简要讨论薄膜基荧光气体传感器研究中的涂层化学基本问题,以及相关薄膜基荧光传感器在隐藏爆炸物、毒品、挥发性有机污染物检测/监测等方面的应用探索。最后,文章展望了薄膜基荧光气体传感器的发展前景和所面临的主要挑战。Adlayer chemistry has been a significant subject of interest in physical chemistry over the past decades.Considerable attention has been paid to the development of high-performance film-based gas sensors,and tremendous progress has been achieved.Among the different analytical techniques,fluorescence provides a highly sensitive and selective method for detecting a wide variety of analytes.Film-based fluorescent sensors have emerged as one of the most promising candidates for chemical sensing and are being further developed into portable devices.Theoretically,relative signal changes including static and dynamic characteristics are significantly used to determine the sensing process;these characteristics are associated with surface absorption,the interaction between the analytes and sensing adlayer,as well as desorption kinetics in the absence and presence of the targeted gaseous analytes.As revealed earlier,there are a number of factors that determine the sensing behavior of a film,and the most important factors have been identified.Firstly,the suitability of the employed sensing fluorophore,which is important as it ultimately determines the effectiveness of a sensing process.Secondly,the structure of the fluorescent adlayer of the film;this is another important factor as it significantly determines the efficiency of mass transfer,which is necessary for efficient and reversible sensing.Finally,the chemical nature and surface structure of the substrate as these could affect the sensing performance of the film via the screening or enriching of analyte molecules.However,in situ,online,fast,and sensitive detection and discrimination of toxic and hazardous species via vapor sampling is a challenge that will persist for many years.By using the simultaneous interaction of multiple analytes with different sensing materials,the sensor array-based approach can recognize the overall change in the composition of complex mixtures,rather than just identifying their specific elements.The data-rich outputs of array-based sensing m

关 键 词：涂层 薄膜基传感器 荧光 气体传感 构效关系 传感器阵列 

分 类 号：O647[理学—物理化学]