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Plasmonics

pp 1–8 | Cite as

Au@MoS2@Au Hierarchical Nanostructures for High-Sensitivity and Recyclable SERS Device

  • Shaohui Guo
  • Xingang Ren
  • Xuanhua LiEmail author
Original Article
  • 21 Downloads

Abstract

The surface-enhanced Raman scattering (SERS) is widely used in chemical analysis and environmental monitoring. Herein, the Au@MoS2@Au three core–shell hierarchical architecture is designed and synthesized through a hydrothermal method and spray process for a high-sensitivity Raman sensor. The enhanced Raman signals achieved in the hierarchical nanostructure are attributed to the two aspects. One is the local electromagnetic field from Au nanoparticles (NPs), including the surface satellites Au NPs and the core Au NPs, and the other is the chemical enhancement from MoS2 nanosheets. As a result, a detection limit of the probe molecule (RhB) as low as 10−10 M is obtained via using this hierarchical Raman substrate. In addition, the hierarchical Au@MoS2@Au Raman substrate can be recycled utilized because of MoS2 photocatalytic ability. The unique Au@MoS2@Au three core–shell nanostructure shows momentous potential to realize a SERS substrate with high-sensitivity and recyclable property.

Keywords

Surface-enhanced Raman scattering Au MoS2 Core-shell 

Notes

Funding Information

This research is financially supported by the Basic Research Fund for Free Exploration in Shenzhen (Grant nos. JCYJ20170815161437298, JCYJ20180306171402878), the National Natural Science Foundation of China (51571166, 21603175), the project of Shaanxi Young Stars in Science and Technology (2017KJXX-18), and the Fundamental Research Funds for the Central Universities (3102019ghxm003, 3102019JC005). We thank the members from the Analytical and Testing Center of Northwestern Polytechnical University for the help on TEM characterization.

Supplementary material

11468_2019_1090_MOESM1_ESM.docx (389 kb)
ESM 1 (DOCX 388 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Research & Development Institute of Northwestern Polytechnical University in ShenzhenShenzhenChina
  2. 2.Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU)Xi’anChina
  3. 3.Key Laboratory of Intelligent Computing & Signal Processing, Ministry of EducationAnhui UniversityHefeiChina

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