Abstract
A novel recyclable flexible SERS substrate with a hierarchical structure was fabricated by growing ZnO nanorods (ZnO NRs) on three-dimensional (3D) ordered cotton fabrics through a chemical hydrothermal method and depositing Ag nanoparticles (Ag NPs) on coral-like ZnO NRs. The Ag/ZnO/cotton fabrics (AZCF) exhibit superior SERS signals with a detection limit of 4-aminothiophenol (PATP) down to 10−10 M and an excellent uniformity (relative standard deviation lowered to less than 20 %). It also can achieve photocatalytic degradation of different substances, such as rhodamine 6G (R6 G), PATP and thiram. Furthermore, this SERS substrate was successfully applied to the in-situ detection of thiram on the surface of apple, and the detection limit is low to 5 mg/kg. Therefore, our studies not only constructed a promising SERS substrate with super sensitivity, good reproducibility and excellent stability for molecular detection, but also suggest a potential method for the actually in-situ detection of pesticide residues.
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Acknowledgements
This work was supported by the Important Research and Development Plan Project of Hebei Province [grant number 19211203D] and the Technology Innovation Center of Hebei for fiber material [grant number SG2020022].
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Recyclable flexible SERS substrate with coral-like nano Ag/ZnO structure used for in-situ detection of pesticides on fruits
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Zhang, S., Liu, A., Wang, J. et al. Recyclable SERS Substrate with Coral-like Nano Ag/ZnO Structure Based on Cotton Fabric Used for In-situ Detection of Pesticides. Fibers Polym 23, 636–643 (2022). https://doi.org/10.1007/s12221-022-3350-x
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DOI: https://doi.org/10.1007/s12221-022-3350-x