PVP-mediated galvanic replacement growth of AgNPs on copper foil for SERS sensing

Micro & nano letters

article

Hui Xiang Wu¹  Ming Cong Rong¹  Yi Ma²  Shan Duo Chen³ 

[1] School of Chemistry and Chemical Engineering/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University;College of Bioengineering, Sichuan University of Science and Technology;College of Life Science, Guangzhou University

关键词: nanocomposites;    biosensors;    nanofabrication;    scanning electron microscopy;    silver;    nanosensors;    chemical sensors;    nanoparticles;    X-ray diffraction;    surface enhanced Raman scattering;    optical sensors;    high Raman signal enhancement factor;    AgNP-based SERS sensor;    copper foil;    cost-effective silver nanoparticles;    surface-enhanced Raman scattering;    galvanic displacement reaction;    optimised AgNO3 concentration;    PVP-mediated galvanic replacement growth;    polyvinyl pyrrolidone;    scanning electron microscopy;    X-ray diffraction;    detection limit;    Rhodamine 6G;    methyl parathion-spiked lake water samples;    environmental protection;    temperature 293.0 K to 298.0 K;    Ag;   

DOI  :  10.1049/mnl.2020.0148

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Herein, the authors present a simple and cost-effective silver nanoparticles (AgNPs)-based surface-enhanced Raman scattering (SERS) sensor based on galvanic displacement reaction using AgNO 3 and copper foil as precursors. With the mediation of polyvinyl pyrrolidone (PVP), AgNPs grow in-situ on the surface of copper foil at room temperature. AgNPs-based SERS sensor was prepared with optimised AgNO 3 concentration of 50 mM, the mass ratio of AgNO 3 to PVP of 2:1 and characterised using scanning electron microscopy and X-ray diffraction. As-fabricated SERS sensor exhibited a high Raman signal enhancement factor of 3.5 × 10 5 in the detection of Rhodamine 6G (R6G). Furthermore, a decent linear relationship for methyl parathion sensing was obtained in the range from 1 × 10 −6 to 1 × 10 −4 M, with an actual detection limit of 1 × 10 −6 M. Recoveries of methyl parathion-spiked lake water samples ranging from 93.64 to 106.16% were obtained, suggesting the feasibility of the SERS sensor. These features demonstrated that the AgNPs-based SERS sensor can potentially be used in sensing a trace amount of chemicals in surface water for environmental protection.

【 授权许可】

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