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3D hierarchical Ag nanostructures formed on poly(acrylic acid) brushes grafted graphene oxide as promising SERS substrates

机译:在聚(丙烯酸)上形成的3D层次Ag纳米结构刷涂接枝的石墨烯氧化物作为承诺的SERS基材

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摘要

In this study, in situ generation of Ag nanostructures with various morphology on poly(acrylic acid) (PAA) brushes grafted onto graphene oxide (GO), for use as substrates for surface-enhanced Raman scattering (SERS), is demonstrated. The overall synthetic strategy involves the loading of Ag precursor ions ((Ag+ and [Ag(NH3)(2)](+)) onto PAA brush-grafted GO, followed by their in situ reduction to Ag nanostructures of various morphology using a reducing agent (NaBH4 or ascorbic acid). Novel 3D hierarchical flowerlike Ag nanostructures were obtained by using AgNO3 as precursor and ascorbic acid as reducing agent. Using 4-aminothiophenol as probe molecules, the as-prepared hierarchical Ag nanostructures exhibited excellent SERS performance, providing enhancement factors of similar to 10(7).
机译:在本研究中,原位产生具有各种形态的Ag纳米结构,在覆盖石墨烯(GO)上的聚(丙烯酸)(PAA)刷上,用作表面增强拉曼散射(SERS)的基板。 整体合成策略涉及将Ag前体离子的加载((Ag +和[Ag(NH 3)(2)](+))加入Paa刷草移植物上,然后使用还原的各种形态的Ag纳米结构进行原位还原 代理(NaBH4或抗坏血酸)。通过使用AgNO3作为前体和抗坏血酸作为还原剂获得新的3D层次花型Ag纳米结构。使用4-氨基噻吩醇作为探针分子,所制备的等级Ag纳米结构表现出优异的SERS性能,提供增强 类似于10(7)的因素。

著录项

  • 来源
    《Nanotechnology》 |2018年第11期|共9页
  • 作者单位

    Ningbo Univ Fac Mat Sci &

    Chem Engn Dept Polymer Sci &

    Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Fac Mat Sci &

    Chem Engn Dept Polymer Sci &

    Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Fac Mat Sci &

    Chem Engn Dept Polymer Sci &

    Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Fac Mat Sci &

    Chem Engn Dept Polymer Sci &

    Engn Ningbo 315211 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Div Polymer &

    Composite Mat Ningbo 315201 Zhejiang Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    graphene oxide; polymer brushes; flowerlike Ag; SERS;

    机译:石墨烯氧化物;聚合物刷;花卉ag;sers;

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