SERS substrate based on large-scale self-assembled Au nanobipyramid@Ag nanorod multifunctional paper-based materials for practical and reliable quantitative SERS detection

IF 3.8 2区化学 Q1 BIOCHEMICAL RESEARCH METHODS

Analytical and Bioanalytical Chemistry Pub Date : 2025-03-22 DOI:10.1007/s00216-025-05830-2

Longlong Luan, Xiang Zhang, Pan Li, Weiping Xu

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引用次数: 0

Abstract

Pesticides and fungicides in foods pose a significant threat to human health. The design and development of a new and efficient sensing platform for the quantitative detection of contaminants in the food industry have become an urgent problem for food security and environmental protection. Here, we report a simple and reliable large self-assembled Au nanobipyramid@Ag nanorod (Au NBPs@Ag NRs) SERS multifunctional paper-based substrate for rapid and sensitive quantitative detection of contaminants in real samples. Moreover, 4-mercaptobenzoic acid (4-MBA) was uniformly distributed on the surface of the Au NBPs@Ag NRs as an internal standard through liquid–liquid interface self-assembly. The effective correction of the fluctuations in the SERS signal and the large number of nanogaps contributed to the increase in the number of SERS “hot spots,” enabling the sensor to have excellent SERS performance. The results showed that the Au NBPs@Ag NRs/4-MBA SERS multifunctional paper-based substrate had excellent sensitivity and reproducibility for the detection of crystal violet (CV) probe molecules. In particular, the SERS sensor is used for the quantitative detection of malachite green (MG) in pond water and thiram (THR) on apple surfaces, and the detection limit was as low as 0.012 ppm and 0.0044 ppm. Therefore, the Au NBPs@Ag NRs/4-MBA SERS-active paper-based substrate is highly efficient and versatile and can be used for reliable sensor analysis of actual sample pollutants.

Graphical Abstract

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基于大规模自组装金nanobipyramid@Ag纳米棒多功能纸基材料的SERS衬底用于实用可靠的定量SERS检测。

食品中的农药和杀菌剂对人类健康构成重大威胁。设计和开发一种新型、高效的食品工业污染物定量检测传感平台，已成为食品安全和环境保护亟待解决的问题。在这里，我们报告了一种简单可靠的大型自组装金nanobipyramid@Ag纳米棒（Au NBPs@Ag NRs） SERS多功能纸基基材，用于快速灵敏地定量检测实际样品中的污染物。4-巯基苯甲酸（4-MBA）通过液-液界面自组装，作为内标均匀分布在Au NBPs@Ag nr表面。对SERS信号波动的有效修正和大量的纳米间隙使得SERS“热点”数量增加，使传感器具有优异的SERS性能。结果表明，Au NBPs@Ag NRs/4-MBA SERS多功能纸基底物对结晶紫（CV）探针分子的检测具有良好的灵敏度和重现性。特别是将SERS传感器用于池塘水中孔雀石绿（MG）和苹果表面硫胺（THR）的定量检测，检出限低至0.012 ppm和0.0044 ppm。因此，Au NBPs@Ag NRs/4-MBA sers活性纸基衬底具有高效率和多用途性，可用于实际样品污染物的可靠传感器分析。

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来源期刊

Analytical and Bioanalytical Chemistry 化学-分析化学

CiteScore

8.00

自引率

4.70%

发文量

638

审稿时长

2.1 months

期刊介绍： Analytical and Bioanalytical Chemistry’s mission is the rapid publication of excellent and high-impact research articles on fundamental and applied topics of analytical and bioanalytical measurement science. Its scope is broad, and ranges from novel measurement platforms and their characterization to multidisciplinary approaches that effectively address important scientific problems. The Editors encourage submissions presenting innovative analytical research in concept, instrumentation, methods, and/or applications, including: mass spectrometry, spectroscopy, and electroanalysis; advanced separations; analytical strategies in “-omics” and imaging, bioanalysis, and sampling; miniaturized devices, medical diagnostics, sensors; analytical characterization of nano- and biomaterials; chemometrics and advanced data analysis.