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- Title
Monolayer ZnS@Ag Nanospheres SERS Substrate for Highly Sensitive Dye Molecules Detection.
- Authors
Li, Chenyan; Yang, Chengxiang; Li, Weijun; Cheng, Mingming; Liu, Yingkai
- Abstract
Surface-enhanced Raman scattering (SERS) substrates with low cost, high sensitivity and good reproducibility are still challenging in practical application. Herein, we propose a facile method to prepare monolayer ZnS@Ag nanospheres (NSs) by sputtering Ag nanoparticles (NPs) on the surfaces of the monolayer ZnS NSs produced by self-assembly. The monolayer ZnS@Ag NSs have rough surface and nanoscale gaps, which can produce large SERS effect. The dye molecules, Rhodamine 6G (R6G) and Rhodamine B (RhB), were used as probe to evaluate the SERS performance on the monolayer ZnS@Ag NSs. It was found that the monolayer ZnS@Ag NSs showed the high SERS sensitivity in the detection of R6G and RhB, the limit of detection (LOD) down to 9.12×10−13 M and 8.55×10−11 M, respectively. The corresponding enhancement factors (EF) are 3.01×108 and 8.2×106, respectively. Furthermore, the ordered structure makes the monolayer ZnS@Ag NSs substrate with high signal reproducibility and stability, and the relative standard deviation (RSD) values are less than 15%. Therefore, the monolayer ZnS@Ag NSs is a candidate for detecting organic dyes in the environment. Monolayer ZnS@Ag NSs were prepared by sputtering silver nanoparticles on the surfaces of the monolayer ZnS NSs produced by dip-coating method. Raman signals of R6G and RhB were enhanced by the SERS-active substrates, made of monolayer ZnS@Ag NSs. The monolayer ZnS@Ag NSs with significant SERS effective could be widely used in practical application for routine SERS analysis and food additives monitoring.
- Subjects
SERS spectroscopy; MONOMOLECULAR films; RAMAN scattering; SILVER nanoparticles; FOOD chemistry; MOLECULES
- Publication
NANO, 2020, Vol 15, Issue 9, pN.PAG
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292020501222