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薄膜基荧光传感因灵敏度高、可采集信号丰富、实时检测性好和易于器件化等优点备受人们关注,特别是随着微纳米加工、集成制造和物联网技术的发展应用,薄膜基荧光传感器研究已经成为传感器研究的一个重要领域,呈现出广阔的发展前景。 结合课题组工作,本文简要讨论了基于小分子化合物的薄膜基荧光气体传感器在隐藏爆炸物、毒品、挥发性有机污染物检测/监测,重大疾病早期诊断等领域的应用探索。 在此基础上,指出了薄膜基荧光传感器发展面临的问题,评述了薄膜基荧光传感器研究和应用的前景。 相似文献
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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。 相似文献
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荧光信号对环境变化的敏感程度主要取决于其产生本源。一般而言,聚集诱导激基缔合物荧光对其所处微环境变化异常敏感,因而引起了荧光传感器研究领域学者的高度关注。除此之外,荧光传感器的传感性能还与其所采用的荧光物种的类型和传感元素的结构密切相关。基于这些认识,本文概括介绍了笔者实验室多年来以聚集诱导激基缔合物荧光为基础的荧光传感器研究进展,特别是以芘为例,系统介绍了该类传感器在液相或气相中的检测应用,其中部分传感器已经实现了仪器化。同时,还介绍了由本课题组提出的用于理解荧光薄膜传感器传感机理和指导新型传感薄膜设计的"二维溶液模型"。最后,展望了荧光传感器研究和应用前景,指出了此类研究面临的主要挑战。 相似文献
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《化学通报》2014,(4)
荧光信号对环境变化的敏感程度主要取决于其产生本源。一般而言,聚集诱导激基缔合物荧光对其所处微环境变化异常敏感,因而引起了荧光传感器研究领域学者的高度关注。除此之外,荧光传感器的传感性能还与其所采用的荧光物种的类型和传感元素的结构密切相关。基于这些认识,本文概括介绍了笔者实验室多年来以聚集诱导激基缔合物荧光为基础的荧光传感器研究进展,特别是以芘为例,系统介绍了该类传感器在液相或气相中的检测应用,其中部分传感器已经实现了仪器化。同时,还介绍了由本课题组提出的用于理解荧光薄膜传感器传感机理和指导新型传感薄膜设计的"二维溶液模型"。最后,展望了荧光传感器研究和应用前景,指出了此类研究面临的主要挑战。 相似文献
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《催化学报》2016,(8)
采用简便的旋涂过程和一步水热法在压电基片上制备了Ga掺杂的ZnO纳米薄膜(GZO).在水热处理过程中,通过添加不同的聚合物可形成纳米盘和纳米花状形貌的薄膜.采用场发射扫描电镜(Fe-SEM)、X射线衍射(XRD)和Raman光谱表征了样品的形貌、微结构和组成.XRD和FE-SEM结果证明,在AlN/Si压电基片上形成的纳米盘、纳米棒和纳米花状GZO均为纤维锌矿相.采用浸渍法进一步在所制GZO样品上固定了绿色的荧光蛋白质(GFP).运用原子力显微镜和荧光光谱分析了GFP与GZO表面结合的性质,考察了其用于传感器和生物成像技术的可行性.痕量GFP的固定使该材料产生荧光响应,表明其用于紫外光传感器时具有较好活性. 相似文献
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传感器阵列是基于对动物嗅觉系统的认识发展起来的一种有力的分子识别手段,其由一系列传感单元组成,通过各传感单元对样品响应后产生的特征图谱实现对特定物质的识别检测,尤其对混合样品的鉴定具有突出优势。其中,荧光传感器阵列由于具有灵敏度高、无需参照体系、输出信号丰富、能够成像等优点,已成为近年来传感器阵列发展的重点。本综述根据荧光传感单元形式的不同,分别介绍了溶液型、颗粒型、薄膜型荧光传感器阵列的发展情况,并重点阐述了荧光传感器阵列的设计方法、传感机理及其在对金属离子、有机化合物和生物分子识别中的应用。 相似文献
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随着国际恐怖袭击事件的增多,痕量爆炸物的识别技术研究越来越为重要.本文以作者在该领域的研究为例,综述了基于一维有机纳米材料、荧光金属配位聚合物(金属-有机框架化合物)和聚噻咯的荧光猝灭技术,在痕量爆炸物识别上的应用.同时介绍了酞菁薄膜和苝亚酰胺纳米线制备的电子传感器分别对过氧化物和硝基类爆炸物有灵敏的响应. 相似文献
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The unique photophysical properties of the Ln(III) series has led to significant research efforts being directed towards their application in sensors. However, for “real-life” applications, these sensors should ideally be immobilised onto surfaces without loss of function. The Langmuir-Blodgett (LB) technique offers a promising method in which to achieve such immobilisation. This mini-review focuses on synthetic strategies for film formation, the effect that film formation has on the physical properties of the Ln(III) amphiphile, and concludes with examples of Ln(III) LB films being used as sensors. 相似文献
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Flexible strain sensors based on conductive fillers and flexible polymers possessed significant advantages in human motion detection. Preparing a strain sensing layer with high electrical conductivity and excellent mechanical property under high content of conductive filler contributed to the stability of flexible strain sensors. In this study, MWCNTs/PDMS composite film was prepared by the organic solvent method. The microstructure, electrical conductivity, mechanical property, and piezoresistive characteristics of the composite film at different MWCNTs contents were characterized and discussed. When the mass fraction of MWCNTs in the composite film was 5%, the composite film exhibited a high electrical conductivity of 9.56 S/m while maintaining ideal mechanical properties, and the film thickness was just about 180 μm. The relationship between electrical signals and film strain was performed. The piezoresistive characteristic results demonstrated that the prepared composite film could be used as flexible strain sensor for human motion detection. The prepared thin MWCNTs/PDMS composite film in this paper illustrated high conductive and desired flexibility, and was an alternative material for human motion detection. 相似文献
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《Sensors and Actuators》1988,13(1):11-27
Transport phenomena in an amorphous silicon film deposited by a glow discharge technique have been reviewed, and many interesting applications of this material in sensors are considered. A large Seebeck effect is observed in the highly-conductive amorphous silicon film and a thermopile power sensor has been developed using this film. The large elastoresistance effect observed in the film has been investigated for possible use in strain sensors, touch sensors and real-time correlators. The light-related phenomena and their sensor applications have also been briefly reviewed. 相似文献
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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(52):16737-16741
The utility of electronically conductive metal–organic frameworks (EC‐MOFs) in high‐performance devices has been limited to date by a lack of high‐quality thin film. The controllable thin‐film fabrication of an EC‐MOF, Cu3(HHTP)2, (HHTP=2,3,6,7,10,11‐hexahydroxytriphenylene), by a spray layer‐by‐layer liquid‐phase epitaxial method is reported. The Cu3(HHTP)2 thin film can not only be precisely prepared with thickness increment of about 2 nm per growing cycle, but also shows a smooth surface, good crystallinity, and high orientation. The chemiresistor gas sensor based on this high‐quality thin film is one of the best room‐temperature sensors for NH3 among all reported sensors based on various materials. 相似文献
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本文采用溶剂挥发法制备了掺杂香豆素151的具有介孔结构的透明二氧化硅薄膜, 并对其荧光发光特性进行了研究. 相似文献
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TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜氢敏性能的研究 总被引:7,自引:0,他引:7
将PtO-Pt纳米粒子膜与TiO2,SnO2纳米粒子膜复合,利用PtO-Pt纳米粒子膜作 为插入电极和催化剂,设计并研制出一类新型双层结构复合膜气体传感器。采用 TEM和SEM对薄膜的显微结构进行了表征,对空气中4.0H2的氢敏性能研究表明: 200℃时,TiO2/PtO-Pt复合膜对氢气的灵敏度为70%,而TiO2纳米粒子膜无响应。 100℃时,SnO2/PtO-Pt复合膜的灵敏度为92%,同样条件下,SnO2纳米粒子膜的灵 敏度仅为4%。说明PtO-Pt纳米粒子膜的催化作用能够显著提高TiO2和SnO2的膜氢 敏性能。另外,TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜均对空气中H2有很高的选 择性。 相似文献
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Bismuth Film Voltammetric Sensor on Pyrolyzed Photoresist/Alumina Support for Determination of Heavy Metals 下载免费PDF全文
Voltammetric sensors based on bismuth film electrodes are an attractive alternative to other sensors for application in electroanalysis of heavy metals. Bismuth film electrodes can be formed by a similar method on the same substrates as mercury. These systems were used most frequently for simultaneous determination of heavy metals such as Pb, Cd and Zn by anodic stripping voltammetry. Our voltammetric sensor was fabricated on an alumina substrate. A photoresist film prepared by pyrolysis of positive photoresist S‐1813 SP15 on the alumina substrate was used as an electrode support for bismuth film deposition. The influence of the Nafion membrane on the measurement sensitivity of the sensor and mechanical stability of the bismuth film were investigated. The sensor was successfully applied for determination of Pb, Cd and Zn in an aqueous solution in the concentration range of 0.2 to 10 µg L?1 by square wave anodic stripping voltammetry on an in‐situ formed bismuth film electrode with Nafion‐coating. Parameters of the sensor such as sensitivity, linearity, detection limit, repeatability and life‐time were evaluated. In the best case, the detection limits were estimated as 0.07, 0.11 and 0.63 µg L?1 for Pb, Cd and Zn, respectively. Finally, the applicability of the sensor was tested in analysis of Pb, Cd and Zn in real samples of tap and river water using the method of standard additions. 相似文献
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YINJi-qiu LIXiao-zhou ZHOUChi ZHANGYi-hua 《高等学校化学研究》2005,21(1):44-47
A kind of luminous bacterial sensors that can quickly detect the acute toxicity of environmental pollutants were developed. The method is based on the detection of the cellular light of bright luminous bacillus by means of fixing cells so as to detect acute toxicity of luminous bacillus. The bacterial sensor is composed of immobilized film of photobacterium phosphoreum. These bacterial films are sensitive to detecting the toxicolds, which are difficult or even impossible to be measured by traditionaL analyticaL chemistry methods. The films should be stored at 4℃ and the stability of the sensors exceeds 1 month with no measurable deterioration of the signal. These results demonstrate that the immobilized film of P. phosphreum can be used to develop the on-line environmental contamination monitor. 相似文献