期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 17, 期 33, 页码 21149-21157出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp04904g
关键词
-
资金
- National Basic Research Program of China [2013CB934304]
- National Natural Science Foundation of China [11175204]
A new type of surface-enhanced Raman scattering (SERS) substrate consisting of beta-cyclodextrin (beta-CD) coated SiO2@Au@Ag nanoparticles (SiO2@Au@Ag@CD NPs) has been achieved. Our protocol was a simplified approach as the fabrication and modification of the silver shell were realized in a single-step reaction by taking advantage of beta-CD as both the reducing and stabilizing agents. The as-synthesized SiO2@Au@Ag@CD NPs were uniform in size and demonstrated high SERS activity and reproducibility. The substrates consisting of the SiO2@Au@Ag@CD NPs were employed for SERS detection of polychlorinated biphenyls (PCBs) including PCB-3, PCB-29 and PCB-77. The SERS detection sensitivity was significantly improved due to enrichment of more PCB molecules captured by beta-CD on the substrate surface, as confirmed by the appearance of the new Raman bands which are attributed to the complexes between beta-CD and PCBs according to the theoretical simulation. Therefore, this work presents a novel approach to the fabrication of effective SERS substrates that can be employed for rapid determination of trace amounts of PCBs in the environment with high detection sensitivity and recognition selectivity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据