Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China.
Nanoscale. 2013 Jul 7;5(13):5887-95. doi: 10.1039/c3nr01273e. Epub 2013 May 22.
Ag-coated sea-urchin-like Fe3O4@C core-shell particles can be synthesized by a facile one-step solvothermal method, followed by deposition of high-density Ag nanoparticles onto the carbon surface through an in situ growth process, respectively. The as-synthesized Ag-coated Fe3O4@C particles can be used as a surface-enhanced Raman scattering (SERS) substrate holding reproducible properties under an external magnetic force. The magnetic function of the particles allows concentrating the composite particles into small spatial regions, which can be exploited to decrease the amount of material per analysis while improving its SERS detection limit. In contrast to the traditional SERS substrates, the present Fe3O4@C@Ag particles hold the advantages of enrichment of organic pollutants for improving SERS detection limit and recycled utilization.
Ag 包覆的海胆状 Fe3O4@C 核壳粒子可以通过简便的一步溶剂热法合成，然后通过原位生长过程将高密度 Ag 纳米粒子沉积在碳表面上。所合成的 Ag 包覆的 Fe3O4@C 粒子可用作表面增强拉曼散射 (SERS) 基底，在外磁场下具有可重复的性质。该粒子的磁性功能允许将复合粒子集中到小的空间区域，这可以用来减少每次分析的材料量，同时提高其 SERS 检测极限。与传统的 SERS 基底相比，本研究中的 Fe3O4@C@Ag 粒子具有富集有机污染物以提高 SERS 检测极限和可回收利用的优点。
