Toward low-cost and sustainable SERS substrate: novel ultrasensitive AMS5 nanoflowers

Shengjie Xiong; Jia Li; Maobin Wei; Donglai Han; Jihui Lang; Huilian Liu; Jinghai Yang; Yang Liu; Ming Gao

doi:10.1039/d2dt03655j

Toward low-cost and sustainable SERS substrate: novel ultrasensitive AMS₅ nanoflowers

Dalton Trans. 2023 Feb 21;52(8):2317-2325. doi: 10.1039/d2dt03655j.

Authors

Shengjie Xiong^{1

2

3}, Jia Li^{1

2

3}, Maobin Wei^{1

2

3}, Donglai Han⁴, Jihui Lang^{1

2

3}, Huilian Liu^{1

2

3}, Jinghai Yang^{1

2

3}, Yang Liu^{1

2

3}, Ming Gao^{1

2

3}

Affiliations

¹ Key Laboratory of Functional Materials Physics and Chemistry (Ministry of Education), College of Physics, Jilin Normal University, Changchun 130103, P. R. China. [email protected].
² National Demonstration Centre for Experimental Physics Education, Jilin Normal University, Siping 136000, P. R. China.
³ Key Laboratory of Preparation and Application of Environmental Friendly Materials, Jilin Normal University, Ministry of Education, Changchun 130103, P. R. China.
⁴ School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P.R. China.

PMID: 36723110
DOI: 10.1039/d2dt03655j

Abstract

Surface-enhanced Raman scattering (SERS) is an analytical technique for the rapid detection of low-concentration analytes. However, the lack of uniform, stable, and recyclable substrate limits its wide applications. Here, Ag-doped MoS₂ (AMS_x) was prepared by the hydrothermal method. Band structures, LSV, and EIS characteristics confirmed that Ag doping can reduce the indirect band gap and increase the charge transfer between substrates and molecules. As a SERS substrate, AMS_x displays excellent reproducibility, stability, and recyclability, which is beneficial for the application of the SERS substrate. Meanwhile, AMS_x has excellent sensitivity with an enhancement factor of 4.07 × 10⁶, comparable to that of precious metals. In addition, AMS_x exhibits ultrahigh sensitivity in sensing bilirubin and Bisphenol A (BPA); the corresponding detection limit of both is 10^-9 M, also better than that of previously reported semiconductors. This work provided a novel idea to synthesize low-cost ultrasensitive SERS substrates and the strategy of improving metal-chalcogenide semiconductor sensing.