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首页> 外文期刊>RSC Advances >Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula
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Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

机译：Biosc形阵列用Ag纳米粒子作为SERS基板装饰，用于直接检测婴儿配方中的三聚氰胺

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摘要

Three-dimensional (3D) plasmonic structures have been intensively investigated as high performance surface enhanced Raman scattering (SERS) substrates. Here, we demonstrate a 3D biomimetic SERS substrate prepared by deposition of silver nanoparticles (Ag NPs) on the bioscaffold arrays of cicada wings using laser molecular beam epitaxy. This deposition method can offer a large number of nanoparticles with average diameter of similar to 10 nm and nanogaps of sub-10 nm on the surface of chitin nanopillars to generate a high density of hotspots. The prepared 3D Ag/cicada SERS substrate shows a limit of detection (LOD) for Rhodamine 6G as low as 10(-7) M, high enhancement factor of 1.09 x 10(5), and excellent signal uniformity of 6.8%. Moreover, the molecular fingerprints of melamine in infant formula can be directly extracted with an LOD as low as 10 mg L-1, without the need for functional modification. The prepared SERS-active substrate, due to its low cost, high-throughput, and good detection performance, can be widely used in applications such as food safety and environmental monitoring.
机译：已经强烈地研究了三维（3D）等离子体结构作为高性能表面增强的拉曼散射（SERS）基板。这里，我们使用激光分子束外延沉积在蝉翼的BioscaffOld阵列上沉积银纳米粒子（Ag nps）制备的3D生物摩擦菌属衬底。该沉积方法可以提供大量纳米颗粒，其平均直径与甲蛋白纳米盖的表面上的亚-10nm的10nm和纳米重组相似，以产生高密度的热点。制备的3D AG / CICADA SERS基板显示了罗丹明6g的检测（LOD）极限，低至10（-7）m，高增强因子为1.09×10（5），并且优异的信号均匀性为6.8％。此外，婴儿配方中三聚氰胺的分子指纹可以用低至10mg L-1的含量直接提取，而无需功能改性。由于其低成本，高通量和良好的检测性能，制备的SERS-活性基材可广泛用于食品安全和环境监测等应用中。

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  • 来源
    《RSC Advances》 |2019年第38期|共6页
  • 作者

    Zhao Nan; Li Hefu; Tian Cunwei; Xie Yanru; Feng Zhenbao; Wang Zongliang; Yan Xunling; Wang Wenjun; Yu Huishan;

  • 作者单位

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

    Liaocheng Univ Sch Phys Sci &

    Informat Technol Shandong Key Lab Opt Commun Sci &

    Technol Liaocheng 252059 Shandong Peoples R China;

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  • 正文语种 eng
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