期刊
FOOD CHEMISTRY
卷 402, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.134433
关键词
Surface -enhanced Raman spectroscopy; Au@Ag core-shell nanoflowers; Electrochemical deposition; Thiram
An innovative bimetallic gold-silver core-shell nanoflowers (Au@Ag-CSNFs) SERS substrate with good reproducibility and ultra-low detection limit has been successfully synthesized and demonstrated for potential application in food settings.
An innovative bimetallic gold-silver core-shell nanoflowers (Au@Ag-CSNFs) SERS substrate has been synthesized by a facile electrochemical reduction process on an indium tin oxide (ITO) glass with a total fabrication time of 3 min. The proposed Au@Ag-CSNFs SERS substrate has been distributed evenly with numerous interstices and cavities between each branch, suggesting potential target trap sites and hot spots. The Au@Ag-CSNFs administered good reproducibility of SERS signals collected from 140 random spots with a relative standard deviation and an enhancement factor of 13.62 % and 0.9 x 107, respectively. The substrate was further extended for the label-free SERS sensing of thiram residues with an ultra-low detection limit of 7.088 x 10-8 mol/L. The designed probe was further subjected to thiram determination in real milk and juice samples with satisfactory recoveries (91.76-109.40 %). The rapidly synthesized Au@Ag-CSNFs substrate can be extended for SERS sensing in a variety of hazards in food settings.
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