A gold-silver alloy nanostars/polyvinyl chloride flexible surface-enhanced Raman scattering (SERS) substrate was fabricated, which has the advantages of high transparency, strong flexibility, and remarkable SERS enhancement performance.During the fabrication process of composite substrate, the addition amount of polyvinyl chloride (PVC) was optimized to obtain a flexible PVC substrate first.Meanwhile, the volume ratio of chloroauric acid/silver nitrate was optimized to prepare the anisotropic gold-silver alloy nanostars (Au@Ag NSs) with distinctive shape and significant SERS enhanced effect.Then, 4-mercaptobenzoic acid, a Raman signal molecule, was detected by Raman spectrometer to determine its SERS intensity on the composite substrate, and the optimal concentration of the Au@Ag NSs solution was determined, which further verified the good SERS effect, reproducibility, and stability of the substrate.Finally, it was successfully applied to the detection of chlorpyrifos residue on apple surface.
SONG Zhiyi
,
CUI Lang
,
PAN Yue
,
LOU Qinqing
,
WANG Shuting
,
WANG Zhouping
,
MA Xiaoyuan
. Fabrication of gold-silver alloy nanostars/polyvinyl chloride flexible surface-enhanced Raman scattering substrate and its detection for chlorpyrifos[J]. Food and Fermentation Industries, 2024
, 50(14)
: 321
-327
.
DOI: 10.13995/j.cnki.11-1802/ts.037180
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