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首页> 外文期刊>RSC Advances >Controllable synthesis of AgNWs@PDA@AgNPs core shell nanocobs based on a mussel-inspired polydopamine for highly sensitive SERS detection
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Controllable synthesis of AgNWs@PDA@AgNPs core shell nanocobs based on a mussel-inspired polydopamine for highly sensitive SERS detection

机译：基于贻贝的聚二胺，可控合成Agnws @ PDA @ Agnps核心壳纳米虫，用于高敏感的SERS检测

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摘要

In this work, a series of AgNWs@PDA@AgNPs core-shell nanocobs based on a mussel-inspired polydopamine (PDA) were controllably synthesized and achieve highly sensitive SERS detection. Owing to the existence of abundant catechol and amine functional groups, PDA molecules could assemble a functional layer on the surface of silver nanowires (AgNWs) and exhibit exceptional adhesion performance. More importantly, silver nanoparticles (AgNPs) with controlled coverage and size were achieved on the surface of the PDA layer by in situ reduction of silver ions into AgNPs with catechol functional groups, forming AgNWs@PDA@AgNPs core-shell nanocobs. By regulating synergistical effect between the AgNWs and AgNPs, the AgNWs@PDA@AgNPs core-shell nanocobs demonstrated a highly sensitive and stable SERS response to Rhodamine 6G (R6G) molecules, and a low limit of detection down to 10(-12) M. Furthermore, the AgNWs@PDA@AgNPs core-shell nanocobs showed an excellent reproducibility and superior stability as a SERS substrate to achieve trace detection. This strategy would have great potential to fabricate multifarious SERS-active substrates that make it possible to detect single molecules and singles cell in chemical and biological fields.
机译：在这项工作中，基于贻贝鼓励的聚稗胺（PDA）的一系列AgNWS @ PDA @ AgNPS核 - 壳纳米虫可被控制合成，实现高度敏感的SERs检测。由于具有丰富的儿茶酚和胺官能团，PDA分子可以在银纳米线（AgNWS）的表面上组装功能层并表现出卓越的粘合性能。更重要的是，通过将银离子的表面降低到具有儿茶酚官能团的AgNP中，在PDA层的表面上实现了具有受控覆盖和尺寸的银纳米颗粒（AgNP），形成AgnWS @ PDA核心 - 壳纳米菌。通过调节AGNW和AGNP之间的协同效应，AGNWS @ PDA @ AGNPS核心壳纳米虫表现出对罗丹明6G（R6G）分子的高度敏感和稳定的SERs，以及低于10（-12）米的检测下限。此外，AgNWS @ PDA @ AgNPS核心 - 壳纳米虫表显示出优异的再现性和优异的稳定性，作为SERS基板以实现痕量检测。该策略将具有巨大的潜力来制造多种SERS-活性底物，这使得可以检测化学和生物领域的单分子和单打细胞。

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  • 来源
    《RSC Advances》 |2018年第48期|共10页
  • 作者

    Zhang Zhiliang; Si Tiantian; Liu Jun; Han Kehui; Zhou Guowei;

  • 作者单位

    Qilu Univ Technol State Key Lab Biobased Mat &

    Green Papermaking Shandong Acad Sci Jinan 250353 Shandong Peoples R China;

    Qilu Univ Technol Sch Chem &

    Pharmaceut Engn Shandong Acad Sci Jinan 250353 Shandong Peoples R China;

    Qilu Univ Technol State Key Lab Biobased Mat &

    Green Papermaking Shandong Acad Sci Jinan 250353 Shandong Peoples R China;

    Qilu Univ Technol Sch Chem &

    Pharmaceut Engn Shandong Acad Sci Jinan 250353 Shandong Peoples R China;

    Qilu Univ Technol Sch Chem &

    Pharmaceut Engn Shandong Acad Sci Jinan 250353 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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