Abstract Highly active Fe₃O₄/GO/Au composite nanomaterial was fabricated as substrate of surface enhanced Raman spectroscopy (SERS) and applied for pesticide residue detection. The three-layer of multifunctional Fe₃O₄/GO/Au nanoparticles(NPs) was designed by facile method, with high hot spots, and was characterized by various techniques, including Ultraviolet spectrophotometry(UV), X-ray diffraction (XRD), infrared absorption spectrometer(IR), and transmission electron microscopy(TEM). The performance of Fe₃O₄/GO/Au was evaluated by Raman spectroscopy with R6G as probe molecule to verify its enhancement effect. It exhibited strong Raman signal with 10⁻ ⁶M of R6G. Furthermore, the presence of Fe₃O₄/GO/Au nanohybrid enabled the SERS-based method to detect mancozeb, and showed a excellent linear relationship in the range of 0.25-25 ppm. Therefore, the proposed SERS approach holds promise as an auxiliary technique for screening contaminated agricultural products, environment sample and food in the future.
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Wu et al. (2024) studied this question.
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