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silver nanocubes monolayers as a SERS substrate for quantitative analysis

Chinese Chemical Letters 2021年第4期32卷 1497-1501页

作者： Ziang Zhou Xiuhui Bai Peishen Li Changzheng Wang Ming Guo Yang Zhang Peiren Ding Shaowei Chen Yunyun Wu Qiang Wang Laboratory for Micro-sized Functional Materials College of Elementary Education and Department of ChemistryCapital Normal UniversityBeijing 100048China School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China College of Chemistry Beijing Normal UniversityBeijing 100875China Department of Chemistry and Biochemistry University of CaliforniaSanta CruzUnited States

Surface-enhanced Raman scattering(SERS)is a powerful spectroscopic tool in quantitative analysis of molecules,where the substrate plays a critical role in determining the detection ***,a silver nanocubes/polyelectrolyte/gold film sandwich structure was prepared as a reproducible,highperformance SERS substrate by the wate r/oil inte rfacial assembly *** addition to the hot spots on the nanocubes surface,the edge-to-edge interspace of the Ag nanocubes led to marked enhancement of the SERS intensity,with a limit of detection of 10~(11)mol/L and limit of quantitation of 10~(10)mol/L for crystal *** rhodamine 6 G and crystal violet were co-adsorbed on the Ag nanocube surfaces,the characteristic SERS peaks of the two molecules remained well resolved and separated,and the peak intensities varied with the respective concentration,which could be exploited for concurrent detection of dual *** from this work indicate that organized ensembles of Ag nanocubes can serve as effective SERS substrate can for sensitive analysis for complex molecular systems.

关键词： silver nanocube Surface enhanced raman scattering Quantitative analysis Rhodamine 6G Crystal violet

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