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In situ decoration of plasmonic silver nanoparticles on poly(vinylidene fluoride) membrane for versatile SERS detection

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Abstract

A new strategy based on a polymer sol was proposed for the in situ fabrication of a poly(vinylidene fluoride) (PVDF) membrane decorated with silver nanoparticles (AgNPs) for application in surface enhanced Raman scattering (SERS). The reduction of Ag(I) in a PVDF sol and the phase inversion of the PVDF membrane were performed simultaneously during the formation of the AgNPs/PVDF membrane. The plasmon resonance features of the AgNPs provide the AgNPs@PVDF membrane with the potential for use as a SERS substrate with negligible background interference following Raman laser excitation. Meanwhile, the properties of the high-viscosity polymer can reduce the diffusion of Ag(I) and prevent the agglomeration of Ag nanoparticles, which potentially contributes to the high SERS activity of the AgNPs@PVDF membrane. The effect of the Ag(I) concentration on the size and distribution of the AgNPs on the membrane surface and the corresponding SERS activity have been investigated. The AgNPs/PVDF membrane decorated with 2.5 wt% Ag presents a high SERS activity and good reproducibility. It also has a sensitive SERS response for 4-NTP molecules with an enhancement factor of 2 × 106 and a low detection concentration of 1 × 10−10 mol L−1. Moreover, the portable and easily-prepared AgNPs@PVDF membrane has potential for the direct detection of Cd(II) owing to the concentration-dependent Raman response.

Graphical abstract: In situ decoration of plasmonic silver nanoparticles on poly(vinylidene fluoride) membrane for versatile SERS detection

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Publication details

The article was received on 24 Jan 2019, accepted on 02 Apr 2019 and first published on 03 Apr 2019


Article type: Paper
DOI: 10.1039/C9NJ00439D
Citation: New J. Chem., 2019, Advance Article

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    In situ decoration of plasmonic silver nanoparticles on poly(vinylidene fluoride) membrane for versatile SERS detection

    R. Liu, J. Tang, H. Yang, W. Jin, M. Liu, S. Liu and J. Hu, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ00439D

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