Seed-mediated growth of flexible Ag NFs with high activity and their application for SERS detection of thiram in tomato juice

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI:10.1016/j.colsurfa.2025.137224

Li Sun , Zheng Ye , Yuan Zhi , Hua Zhang , Binlin Dou , Yuejin Shan , Jian Chen

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引用次数: 0

Abstract

In this study, a prospective strategy on seed-mediated growth in vacuum is provided and used to prepare flexible silver nanofilms (AC_0–3 NFs) with high purity, crystallinity and SERS performance. Noteworthy, AC₂ NFs surface is uniformly covered with silver nanoparticles (Ag NPs), following the appearance of numerous nano-gaps between Ag NPs. Through the finite-difference time-domain (FDTD) simulation, it is found that the ultra-small nano-gaps less than 5 nm can generate abundant “hot spots” to amplify the Raman signal. Therefore, the above AC₂ NFs as SERS substrates exhibit superior activity for the SERS detection of thiram in tomato juice, with the limit of detection (LOD) of 10⁻¹⁵ M and the enhancement factor (EF) of 3.7 × 10¹¹. Meanwhile, AC₂ NFs show outstanding reproducibility and stability during the SERS detection. Additionally, the calibration curve is established, by which the thiram (10⁻⁷ to 10⁻¹⁵ M) can be quantitatively detected. Clearly, the as-prepared flexible AC₂ NFs have great potential in the SERS detection and analysis.

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高活性柔性Ag NFs种子介导生长及其在番茄汁中硫胺SERS检测中的应用

本研究提供了一种在真空中种子介导生长的前瞻性策略，并用于制备具有高纯度、高结晶度和高SERS性能的柔性银纳米膜（AC0-3 NFs）。值得注意的是，ac2nfs表面均匀覆盖着银纳米颗粒（Ag NPs），在银纳米颗粒之间出现了许多纳米间隙。通过时域有限差分（FDTD）仿真，发现小于5 nm的超小纳米间隙可以产生丰富的“热点”来放大拉曼信号。因此，上述AC2 NFs作为SERS底物对番茄汁中硫胺的SERS检测具有较好的活性，检测限（LOD）为10−15 M，增强因子（EF）为3.7 × 1011。同时，AC2 NFs在SERS检测中表现出良好的再现性和稳定性。此外，建立了校准曲线，通过该曲线可以定量检测10−7 ~ 10−15 M的浓度。可见，制备的柔性ac2nfs在SERS检测和分析中具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.