液相剥离自组装法制备AgNPs/MoS<sub>2</sub>复合SERS基底及其性能

doi:10.11896/cldb.24040049

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Abstract Two-dimensional nanomaterials have demonstrated significant application potential in the field of surface-enhanced Raman scattering (SERS) because of their atomic thickness, tunable band gap, and high specific surface area. Metal nanoparticles can be added to 2D materials to greatly improve their SERS performance. This work presents a straightforward preparation process for composite materials made of AgNPs and MoS₂, combining the advantages of AgNPs’ strong conductivity, good light transmittance, and bending flexibility, the method utilizes natural molybdenum disulfide powder to achieve one-step liquid-phase exfoliation and in-situ synthesis of AgNPs. The single factor analysis method was used to determine the influence range of the mass ratio of silver nitrate to molybdenum disulfide, mechanical stirring speed, and ultrasonic duration, and then the response surface analysis method was used to design and optimize the experimental conditions. When the mass ratio of silver nitrate to molybdenum disulfide is 5∶1, the mechanical stirring speed is 1 000 r/min, and the ultrasonic duration is 3 h, the prepared SERS substrate shows high sensitivity and good linear relationship when detecting low concentrations of malachite green, the enhancement factor reaches 4 orders of magnitude.

Key words： surface-enhanced Raman spectroscopy sensing (SERS) molybdenum disulfide substrate malachite green

Published: 25 August 2024 Online: 2024-09-10

CLC number:	TB34
	TB333

Fund:National Key R&D Program of China (2020YFA0710202), the National Natural Science Foundation of China (U1662130), Shanxi Province Science Foundation for Youths (202203021212300) and the Taiyuan University of Science and Technology Scientific Research Initial Funding (20212064).

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	ZHOU Dan
	LIU Yiming
	WANG Zhigang
	YIN Jianzhong
	XU Qinqin

Cite this article:

ZHOU Dan,LIU Yiming,WANG Zhigang, et al. Preparation and Performance of AgNPs/MoS₂ Composite SERS Substrate via Liquid Phase Exfoliation[J]. Materials Reports, 2024, 38(16): 24040049-7.

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http://www.mater-rep.com/EN/10.11896/cldb.24040049 OR http://www.mater-rep.com/EN/Y2024/V38/I16/24040049

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