ZnO nanoparticles on MoS2 microflowers for ultrasensitive SERS detection of bisphenol A


A heterojunction microcomposite was synthesized that consists of ZnO nanoparticles (ZnO NPs) anchored on MoS2 microflowers (MoS2 MFs). The material is shown to enable trace level detection of the pollutant bisphenol A (BPA). The microcomposite was characterized by XRD, XPS, SEM and TEM. In addition, coupling reaction between phenolic estrogens and Pauly’s reagents was adopted to greatly enhance the SERS signal. BPA display a characteristic Raman band at 1592 cm−1 which can be used for its selective detection. The assay is highly sensitive and has a 1 nM detection limit which is the lowest among the reported semiconductor substrates.

MoS2/ZnO MCs SERS substrate broke through the application barrier of semiconductor composite materials in SERS substrates. It also sheds light on a deeper understanding of the charge-transfer based enhancement mechanism.

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This work is supported by the National Natural Science Foundation of China (No. 61675090, 61575080, 61705020 and 21676115); National Youth Program Foundation of China (No. 61405072, 21546013, 61704065, 61705078 and 51609100); Program for the development of Science and Technology Jilin province (Grant Numbers 20160101287JC and 20150519024JH); and Technology of Education Department of Jilin Province (Grant Number JJKH20170374KJ).

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Correspondence to Ming Gao.

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Quan, Y., Yao, J., Yang, S. et al. ZnO nanoparticles on MoS2 microflowers for ultrasensitive SERS detection of bisphenol A. Microchim Acta 186, 593 (2019). https://doi.org/10.1007/s00604-019-3702-4

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  • MoS2/ZnO MCs
  • MoS2 MFs
  • SERS
  • Enhancement mechanism