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Shell-switchable SERS blocking strategy for quantitative copper ion detection using single-particle SERS probes

delete2026-04-08
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PRE
AI
L
Longteng Liang
Y
Yingqing Zhu
A
Anran Wang
L
Lixia Li
N
Ning Feng *
刘
刘玉芳 (Yufang Liu) *
DOI:10.1039/D6AN00174Bdelete
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摘要

摘要

En 中文
铜离子(Cu2+)的准确检测对环境保护和人类健康至关重要。在本工作中,我们开发了一种基于单颗粒表面增强拉曼散射(SERS)探针的壳层可切换SERS阻断策略用于Cu2+定量。在检测中,带有隐藏标签的单双层拉曼增强金纳米结构被用作单颗粒SERS探针。Au壳层作为开关,通过Cu2+诱导的氧化蚀刻进行调制,实现了拉曼强度的可控调节。基于此原理,通过将SERS强度变化(ΔI)与浓度相关联实现了Cu2+定量,检测范围为10−7–10−3 M,检测限(LOD)为33.8 nM。该开发的传感策略对Cu2+表现出卓越的灵敏度和对各种干扰金属离子的高选择性。此外,它已成功应用于实际水样中的Cu2+检测,证明了其可靠性和实际应用性。另外,该系统可进一步扩展以执行化学逻辑运算,突显其在智能传感应用中的潜力。
Keyword:
Copper ions
SERS probes
Shell-switchable strategy
Quantitative detection
Single-particle sensing

期刊

A
Analyst
IF:
3.3
论文数:
1.6W
被引数:
3.3W

机构

H
henan normal university
学者数:
1.1W
论文数: 6.2K
被引数: 6
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