Open AccessFabrication process and characterization of AgNPs/PVA/cellulose as a SERS platform for in-situ detection of residual pesticides in fruit
Author(s) -
Huong Nguyen Thi,
Dai Hai Nguyen,
Minh Thanh Vu,
Huynh Nhu Tran,
Linh Phuong Pham Tran,
Ngoc-Tram Nguyen-Thi,
Ngoc Thuy Trang Le,
Nguyen Le Minh Tri
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab7e6c
Subject(s) - silver nanoparticle , materials science , cellulose , polyvinyl alcohol , raman scattering , scanning electron microscope , detection limit , raman spectroscopy , analytical chemistry (journal) , nanoparticle , nanotechnology , chemical engineering , chemistry , chromatography , optics , composite material , organic chemistry , physics , engineering
In this work, AgNPs/PVA/Cellulose was used as a substrate material for surface Raman scattering enhancement. Silver nanoparticles (AgNPs) was synthesized by Lee and Meisel’s method with the average particles size of 15.4 nm. Then, this silver colloid was made a homogenous coating on polyvinyl alcohol and cellulose film and structural characteristics of this material were determined using Scanning Electron Microscopy (SEM). The findings demonstrated that the Raman shifts of the pesticide will be identified by the SERS method at 1660 cm −1 , 2234 cm −1 (strong intensity), and at 3077 cm −1 , 1033 cm −1 , 1457 cm −1 (medium intensity) when using the excited laser with wavelength of 532 nm. Under excited laser, the limit of chlorfenapyr detection is 1 ppm (mg l −1 ), allowing determination of chlorfenapyr residue in food. Potential applications identified food samples containing chlorfenapyr residue for rapid detection, low cost, non-destructive nature and minimal sample preparation.