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首页> 外文期刊>RSC Advances >Synthesis and anisotropic self-assembly of Ag nanoparticles immobilized by the Pluronic F127 triblock copolymer for colorimetric detection of H2O2
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Synthesis and anisotropic self-assembly of Ag nanoparticles immobilized by the Pluronic F127 triblock copolymer for colorimetric detection of H2O2

机译：用Pluronic F127三嵌段共聚物固定的Ag纳米颗粒的合成和各向异性自组装用于比色性检测H2O2

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摘要

With dopamine as a reducing and sticking agent, triblock copolymer poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO), Pluronic F127, was employed to immobilize and stabilize silver nanoparticles (Ag NPs) by the chemical reduction of silver nitrate, AgNO3. Thus, a ternary system comprising Ag NPs, dopamine and F127, i.e. a Ag@DA@F127 system was constructed. In this ternary system, Ag NPs were anisotropically self-assembled and uniformly dispersed in network-like F127 micelles. As evidenced the dispersion stability of Ag NPs in this system was significantly enhanced compared to the Ag@DA and Ag@NaBH4@F127 system, which in turn resulted in a more sensitive and quantitative detection of H2O2. Further investigation demonstrated that the Ag@DA@F127 system exhibited a UV-vis absorption band at similar to 405 nm and the intensity of this absorption band dramatically decreased linearly over the concentration range of 0.1-100 mu M H2O2 (r(2) = 0.99056), deriving a detection limit of 33 nM, which was superior to recent reports. Apart from its excellent performance in H2O2 detection, this Ag@DA@F127 system has other benefits including facile and simple, being environmentally friendly, and especially the formation of a specific network-like structure to fully disperse Ag NPs, which makes it practical in H2O2 detection.
机译：用多巴胺作为还原和粘附剂，使用三嵌段共聚物聚（环氧乙烷） - 聚（环氧丙烷） - 聚（环氧丙烷）（PEO-PPO-PEO），Pluronic F127，以固定和稳定银纳米颗粒（Ag NPS ）通过硝酸银的化学还原，AgNO3。因此，构建了包含Ag NPS，多巴胺和F127的三元系统，即AG @ DA @F127系统。在该三元系统中，AG NPS是各向异性的自组装，并均匀地分散在网络状F127胶束中。如证明，与AG @ DA和AG @ Nabh4 @ F127系统相比，该系统中Ag NP的分散稳定性显着提高，这反过来导致H2O2的更灵敏和定量检测。进一步的研究表明，AG @ DA @ F127系统在类似于405nm的UV-Vis吸收带中，并且该吸收带的强度在0.1-100μmH2O2（R（2）=的浓度范围内直线地降低（R（2）= 0.99056），衍生33nm的检测限，近期报告优于最近的报道。除了在H2O2检测方面的优异性能外，该AG @Da @F127系统还具有其他优点，包括轻巧，简单，环境友好，尤其是形成特定网络状结构，以完全分散AG NPS，这使得它变得实用H2O2检测。

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  • 来源
    《RSC Advances》 |2015年第118期|共10页
  • 作者

    Wu Cong; Xia Guangmei; Sun Jing; Song Rui;

  • 作者单位

    Univ Chinese Acad Sci Coll Chem &

    Chem Engn Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Chem Beijing Natl Lab Mol Sci Key Lab Engn Plast Beijing 100190 Peoples R China;

    Chinese Acad Sci Shanghai Inst Microsyst &

    Informat Technol Shanghai 200050 Peoples R China;

    Univ Chinese Acad Sci Coll Chem &

    Chem Engn Beijing 100049 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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