• 主题
高级搜索  >
历史搜索 清空历史
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
【24h】

Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

机译：以Ag纳米颗粒为SERS底物的生物支架阵列可直接检测婴儿配方食品中的三聚氰胺

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

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 ～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 × 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：三维（3D）等离子体激元结构已作为高性能表面增强拉曼散射（SERS）衬底进行了深入研究。在这里，我们演示了一种3D仿生SERS衬底，该衬底是通过使用激光分子束外延将银纳米颗粒（Ag NP）沉积在蝉翼的生物支架阵列上而制备的。这种沉积方法可以在几丁质纳米柱的表面上提供大量平均直径约为10 nm的纳米颗粒和低于10 nm的纳米间隙，从而产生高密度的热点。制备的3D Ag /蝉SERS底物对罗丹明6G的检出限（LOD）低至10〜（？7）M，1.09×10〜（5）的高增强因子和6.8％的出色信号均匀性。而且，婴儿配方食品中三聚氰胺的分子指纹可以用低至10 mg L〜（？1）的LOD直接提取，而无需进行功能修饰。所制备的SERS活性底物由于其低成本，高通量和良好的检测性能，可广泛用于食品安全和环境监测等应用中。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号