SERS detection of thiram using a 3D sea cucumber-like composite flexible porous substrate,Analyst

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SERS detection of thiram using a 3D sea cucumber-like composite flexible porous substrate
Analyst ( IF 3.6 ) Pub Date : 2024-08-13 , DOI: 10.1039/d4an00610k
Yimeng Shi _{1,

2} , Yan Zhu _{2,

3} , Jiaojiao Sun ₂ , Huancai Yin _{1,

2} , Jian Yin _{1,

2}

Affiliation

Nowadays, trace detection of thiram is in urgent demand due to its widespread application in agriculture and significant harmful effects on public health. In this work, a three-dimensional (3D) sea cucumber-like flexible porous surface-enhanced Raman scattering (SERS) substrate composed of a poly(vinylidene fluoride) (PVDF) membrane, ZnO nanorods, gold films, and Ag nanoparticles (Ag/Au/ZnO/P) has been established for the highly sensitive detection of thiram. The substrate takes advantage of the 3D morphology of the Ag/Au/ZnO system on a flexible porous PVDF membrane to produce abundant plasmonic hot spots. Meanwhile, the employment of an AgNPs/Au shell system combined the benefits of both gold and silver metals, thus guaranteeing stable and sensitive detection. With 4-mercaptobenzoic acid (4-MBA) as a probe molecule, the Ag/Au/ZnO/P substrate exhibited excellent linear detection in the range of 10⁻¹¹–10⁻⁵ M, with a correlation coefficient (R²) of 0.99 and an enhancement cofactor of 7.09 × 10⁷. The substrate exhibited excellent uniformity with a related standard deviation (RSD) value of 3.82% and demonstrated high stability during a 15 d-storage test. In addition, the substrate could detect thiram in an aqueous solution at concentrations as low as 10⁻¹⁰ M with excellent selectivity. Meanwhile, thiram on the surface of apple peel could be easily detected by the Ag/Au/ZnO/P substrate with the “paste-and-peel” method in less than 10 s, and the detection limit could be as low as 0.48 ng cm⁻². Overall, the remarkable performance of the Ag/Au/ZnO/P SERS substrate demonstrated its great potential for the environmental monitoring of thiram.

中文翻译：

使用 3D 类海参复合柔性多孔基质进行福美双的 SERS 检测

由于福美双在农业中的广泛应用以及对公众健康的严重危害，目前对福美双的痕量检测需求迫切。在这项工作中，三维（3D）海参状柔性多孔表面增强拉曼散射（SERS）基底由聚偏二氟乙烯（PVDF）膜、ZnO纳米棒、金膜和银纳米颗粒（Ag）组成。 /Au/ZnO/P) 已建立用于福美双的高灵敏度检测。该基底利用柔性多孔 PVDF 膜上 Ag/Au/ZnO 系统的 3D 形态来产生丰富的等离子体热点。同时，AgNPs/Au壳系统的采用结合了金和银金属的优点，从而保证了检测的稳定和灵敏。以4-巯基苯甲酸（4-MBA）为探针分子，Ag/Au/ZnO/P底物在10 ^-11 –10 ^-5 M范围内表现出优异的线性检测，相关系数（ R ² ）为0.99 和增强辅助因子 7.09 × 10 ⁷ 。该基材表现出优异的均匀性，相关标准偏差 (RSD) 值为 3.82%，并在 15 d 储存测试中表现出高稳定性。此外，该底物可以以优异的选择性检测水溶液中浓度低至10 ^-10 M的福美双。同时，Ag/Au/ZnO/P基体采用“粘贴-剥离”法可在不到10 s的时间内轻松检测出苹果皮表面的福美双，检测限可低至0.48 ng厘米^-2 。总体而言，Ag/Au/ZnO/P SERS 基底的卓越性能证明了其在福美双环境监测方面的巨大潜力。

更新日期：2024-08-13

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