利用 Au@Ag 纳米海胆纸尖基底的超灵敏表面增强拉曼散射传感六价铬

IF 4.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Communications Pub Date : 2024-10-01 DOI:10.1039/d4cc04136d

Ronghui Xu , Lu Tan , Wei Xu , Li Xiao , Yingping Zheng , Ying Li , Yongbing Lou

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引用次数: 0

摘要

合成了甲巯咪唑功能化的双金属 Au@Ag 纳米海胆（Au@Ag NSUs），并将其与纸尖相结合，作为超灵敏六价铬检测的高效表面增强拉曼散射（SERS）基底。甲巯咪唑与六价铬之间的氧化还原反应确保了六价铬定量分析的可靠性。根据重力效应，当液滴不断滴落在纸的尖端时，纳米粒子在尖端的前端实现富集，从而进一步提高了检测灵敏度。该传感器的检测限低至 0.956 ng L-1，在超标六价铬检测方面表现出色。此外，该 SERS 传感器还成功应用于实际水样（如湖水和自来水）中六价铬的检测，表明其在环境监测中具有广泛的应用潜力。这项研究不仅为检测六价铬提供了一种高效可靠的新方法，还展示了纸质 SERS 传感器在实际应用中的巨大前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ultrasensitive surface-enhanced Raman scattering sensing of Cr(vi) with a Au@Ag nano-sea urchin paper-tip substrate†

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Ultrasensitive surface-enhanced Raman scattering sensing of Cr(vi) with a Au@Ag nano-sea urchin paper-tip substrate†

Bimetallic Au@Ag nano-sea urchins (Au@Ag NSUs) functionalized with methimazole were synthesized and combined with paper tips as efficient surface-enhanced Raman scattering (SERS) substrates for ultrasensitive Cr(vi) detection. The redox reaction between methimazole and Cr(vi) ensured the reliability of quantitative Cr(vi) analysis. When droplets were continuously dropped on the tip of the paper, based on the gravity effect, the nanoparticles achieved enrichment at the front end of the tip, which further improved the sensitivity of detection. The detection limit is as low as 0.956 ng L⁻¹, demonstrating its excellent performance in ultrarace Cr(vi) detection. Additionally, the SERS sensor was successfully applied to the detection of Cr(vi) in real water samples, such as lake water and tap water, indicating its wide application potential in environmental monitoring. This study not only provides an efficient and reliable new method for detecting Cr(vi) but also shows the great prospect of paper-based SERS sensors in practical applications.

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来源期刊

Chemical Communications 化学-化学综合

CiteScore

8.60

自引率

4.10%

发文量

2705

审稿时长

1.4 months

期刊介绍： ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.