Annealing Temperature-Dependent Surface-Enhanced Raman spectroscopy on MoS2-Covered silver nanoparticle array

Muhua Li; Yanqi Liu; Xuan Liu; Yongzhi Zhang; Tiying Zhu; Chao Feng; Yan Zhao

doi:10.1016/j.saa.2022.121159

Annealing Temperature-Dependent Surface-Enhanced Raman spectroscopy on MoS₂-Covered silver nanoparticle array

Spectrochim Acta A Mol Biomol Spectrosc. 2022 Jul 5:275:121159. doi: 10.1016/j.saa.2022.121159. Epub 2022 Mar 15.

Authors

Muhua Li¹, Yanqi Liu¹, Xuan Liu², Yongzhi Zhang¹, Tiying Zhu¹, Chao Feng³, Yan Zhao⁴

Affiliations

¹ Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
² Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Key Laboratory of Trans-scale Laser Manufacturing Technology (Beijing University of Technology), Ministry of Education, Beijing 100124, China; Beijing Engineering Research Center of Laser Technology, Beijing University of Technology, Beijing 100124, China; Beijing Colleges and Universities Engineering Research Center of Advanced Laser Manufacturing, Beijing 100124, China.
³ Faculty of Science, Beijing University of Technology, Beijing 100124, China.
⁴ Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Key Laboratory of Trans-scale Laser Manufacturing Technology (Beijing University of Technology), Ministry of Education, Beijing 100124, China; Beijing Engineering Research Center of Laser Technology, Beijing University of Technology, Beijing 100124, China; Beijing Colleges and Universities Engineering Research Center of Advanced Laser Manufacturing, Beijing 100124, China. Electronic address: zhaoyan@bjut.edu.cn.

PMID: 35306305
DOI: 10.1016/j.saa.2022.121159

Abstract

Surface-enhanced Raman spectroscopy (SERS) is an ultra-sensitive analytical tool that can effectively detect and identify molecules by their unique vibrational fingerprints. Development of SERS substrates with good stability, high sensitivity and reproducibility is still a big challenge in practical applications. Recently, 2D materials/metallic hybrid SERS substrates provide a new prospect to improve the SERS performance. Here, we obtain a monolayer MoS₂ covered silver nanoparticle (AgNP) array as a high-performance SERS substrate. Annealing temperature-dependent SERS signals on the hybrid substrate have been explored. The optimum SERS performance was obtained at 290 ℃ (the detection limit of 10^-13 M for Rhodamine 6G and the corresponding SERS enhancement factor of 8.3 × 10⁹), which is attributed to the better contact between AgNPs and MoS₂ and the uniform AgNPs with appropriate particle sizes. The prepared MoS₂/AgNPs hybrid substrates also have been utilized to detect various molecules, which demonstrates a great potential for applications in food safety and biochemical environmental detection.

Keywords: 2D materials; Annealing temperature; SERS; Silver nanoparticle array.

MeSH terms

Metal Nanoparticles* / chemistry
Molybdenum
Reproducibility of Results
Silver* / chemistry
Spectrum Analysis, Raman / methods
Temperature

Substances

Silver
Molybdenum