Self-floating, self-water-supplying, recyclable cellulose SERS platform with Au@Ag nanocubes for food contaminant detection

IF 5.2 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchemical Journal Pub Date : 2026-04-01 Epub Date: 2026-02-14 DOI:10.1016/j.microc.2026.117378

Haoran Zhang , Guoqiang Fang , Siqingaowa Han , Jingkun Yuan , Bing Zhang , Wenhao Li , Jiheng Zhang , Wuliji Hasi

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Abstract

This study developed a self-floating, self-water-supplying cellulose-based surface-enhanced Raman scattering sensing platform with excellent recyclability (FWCSERS). The platform utilized gold-core@silver-shell nanocubes (Au@Ag NCs) as the active substrate, which were modified onto a hydrophilic cellulose filter membrane and fixed on a polystyrene foam float. By leveraging the capillary force of the cellulose membrane to spontaneously transport the test solution to the detection area, real-time analysis was achieved without external pumping. Using crystal violet as a model molecule, the platform's performance was validated, demonstrating a detection limit (LOD) as low as 10⁻⁹ M, good stability, and an analytical enhancement factor (AEF) of 2.22 × 10⁵. The platform also enabled quantitative detection of thiram and rhodamine B over a wide concentration range (10⁻⁹ M to 10⁻⁵ M). It exhibited excellent applicability in practical samples, including lake water, bean sprout extract, and chili powder solution. Furthermore, the substrate could be regenerated for reuse via immersion in pure water after detection. This work provides an efficient and low-cost on-site detection solution for monitoring food and environmental pollutants.

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含有Au@Ag纳米立方体的自漂浮、自供水、可回收纤维素SERS平台用于食品污染物检测

本研究开发了一种自漂浮、自供水的纤维素基表面增强拉曼散射传感平台，具有良好的可回收性（FWCSERS）。该平台利用gold-core@silver-shell纳米立方（Au@Ag NCs）作为活性底物，将其修饰为亲水性纤维素过滤膜，并固定在聚苯乙烯泡沫浮子上。通过利用纤维素膜的毛细力自发地将测试溶液输送到检测区域，无需外部泵送即可实现实时分析。以结晶紫为模型分子，验证了该平台的性能，检测限（LOD）低至10−9 M，稳定性好，分析增强因子（AEF）为2.22 × 105。该平台还可以在宽浓度范围（10−9 M至10−5 M）内定量检测西拉姆和罗丹明B。在湖水、豆芽提取物、辣椒粉溶液等实际样品中均表现出良好的适用性。此外，检测后的底物可以通过浸泡在纯水中再生再利用。本工作为食品和环境污染物监测提供了一种高效、低成本的现场检测解决方案。

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来源期刊

Microchemical Journal 化学-分析化学

CiteScore

8.70

自引率

8.30%

发文量

1131

审稿时长

1.9 months

期刊介绍： The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field. Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.