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

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 AgNO3 and copper foil as precursors. With the mediation of polyvinyl pyrrolidone (PVP), AgNPs grow in-situ on the s...

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Bibliographic Details
Published in:Micro & nano letters 2020-08, Vol.15 (9), p.590-594
Main Authors: Xiang Wu, Hui, Cong Rong, Ming, Ma, Yi, Duo Chen, Shan
Format: Article
Language:English
Subjects:
AgNP‐based SERS sensor
biosensors
chemical sensors
Copper
copper foil
cost‐effective silver nanoparticles
Detection
detection limit
Environmental protection
galvanic displacement reaction
high Raman signal enhancement factor
Metal foils
Methyl parathion
methyl parathion‐spiked lake water samples
nanocomposites
nanofabrication
Nanoparticles
nanosensors
optical sensors
optimised AgNO3 concentration
polyvinyl pyrrolidone
PVP‐mediated galvanic replacement growth
Raman spectra
Rhodamine 6G
Room temperature
scanning electron microscopy
Sensors
silver
Silver nitrate
surface enhanced Raman scattering
Surface water
temperature 293.0 K to 298.0 K
Water sampling
X‐ray diffraction
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Summary: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 AgNO3 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 AgNO3 concentration of 50 mM, the mass ratio of AgNO3 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 × 105 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.
ISSN:1750-0443
1750-0443
DOI:10.1049/mnl.2020.0148