Open AccessPVP‐mediated galvanic replacement growth of AgNPs on copper foil for SERS sensing
Author(s) -
Xiang Wu Hui,
Cong Rong Ming,
Ma Yi,
Duo Chen Shan
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0148
Subject(s) - silver nanoparticle , materials science , copper , detection limit , foil method , rhodamine 6g , raman scattering , galvanic cell , linear range , analytical chemistry (journal) , nuclear chemistry , scanning electron microscope , nanotechnology , nanoparticle , chemical engineering , raman spectroscopy , chemistry , metallurgy , chromatography , composite material , optics , organic chemistry , molecule , physics , engineering
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.