摘要Herein,a reusable and portable surface-enhanced Raman spectroscopy(SERS)sandpaper was successfully synthesized for the sensitive detection of S-fenvalerate in foods.Commercial sandpapers were decorated with Ag@SiO2@Au nanoarrays via a liquid-liquid interface self-assembly method.The capacity of sandpaper to float directly on the cyclohexane-water interface allows nanoarrays to be formed directly on it,thereby minimizing stacking issues typically associated with nanoarray assemblies and significantly enhancing the sensitivity of S-fenvalerate detection.Moreover,the SERS sandpaper was reusable and portable due to its strong adhesion of the nanoarrays.Under optimized testing conditions,the developed SERS sandpaper method was capable of detecting S-fenvalerate,demonstrating a strong linear response within a concentration range of 10-7-103 μmol/L,with a limit of detection of 1.92 × 10-8 μmol/L.The analysis of spiked food samples containing S-fenvalerate using the developed SERS sandpaper afforded excellent recoveries(92.2％-109.7％).Additionally,the SERS sandpaper was successfully applied to quantify S-fenvalerate in real food samples,with results consistent with analyses conducted using gas chromatography.