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Colorimetric Sensor Based on Self-Assembled Polydiacetylene/Graphene-Stacked Composite Film for Vapor-Phase Volatile Organic Compounds

机译：基于自组装聚二乙炔/石墨烯复合膜的比色传感器对气相挥发性有机物的影响

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摘要

A portable litmus-type chemosensor is developed for the effective detection of environmentally hazardous volatile organic compounds (VOCs) using polydiacetylene (PDA) and graphene stacked within a composite film. The graphene is exploited as a transparent and efficient supporter for the highly ordered PDA monolayer. This colorimetric sensor exhibits a sensitive response to low concentrations of VOCs (～0.01%), including tetrahydrofuran (THF), chloroform (CHCI_3), methanol (CH_3OH), and dimethylformamide (DMF). The color change that is caused by relatively high concentrations of VOCs can be perceived by the naked eye, and it is noteworthy that a logarithmic relationship is observed between the chromatic response and the VOC concentration in the range of ～0.01%-10%. The structural conformation changes of the PDA molecules, caused by interactions with VOCs, are directly observed by scanning tunneling microscopy (STM), which reveals the intrinsic mechanism of the chromatic variety at the molecular level.
机译：开发了一种便携式石蕊型化学传感器，可使用堆叠在复合膜中的聚二乙炔（PDA）和石墨烯来有效检测对环境有害的挥发性有机化合物（VOC）。石墨烯被用作高度有序的PDA单层的透明高效载体。该比色传感器对低浓度的VOC（〜0.01％）表现出敏感的响应，包括四氢呋喃（THF），氯仿（CHCI_3），甲醇（CH_3OH）和二甲基甲酰胺（DMF）。肉眼可以看到由较高浓度的VOC引起的颜色变化，值得注意的是，色度响应与VOC浓度在〜0.01％-10％的范围内观察到对数关系。 PDA分子的结构构象变化是由于与VOC相互作用而引起的，可通过扫描隧道显微镜（STM）直接观察到，这揭示了分子水平上色变的内在机理。

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  • 来源
    《Advanced Functional Materials》 |2013年第48期|6044-6050|共7页
  • 作者

    Xiaona Wang; Xiuling Sun; Ping An Hu; Jia Zhang; Lifeng Wang; Wei Feng; Shengbin Lei; Bin Yang; Wenwu Cao;

  • 作者单位

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China,Department of Material Physics and Chemistry Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China,Department of Material Physics and Chemistry Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China,Department of Material Physics and Chemistry Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China,Department of Material Physics and Chemistry Harbin Institute of Technology Harbin, 150080, China;

    Key Lab of Microsystem and Microstructure of the Ministry of Education Harbin Institute of Technology Harbin, 150080, China;

    Condensed Matter Science and Technology Institute Harbin Institute of Technology Harbin, 150080, China;

    Condensed Matter Science and Technology Institute Harbin Institute of Technology Harbin, 150080, China;

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