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灵敏和稳定的NCF/GO/Au@Ag SERS基质用于检测多环芳的痕迹

Lili Kong¹, Xinna Yu², Qifang Sun³

¹School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China.

|June 27, 2025

概括

一种新的纳米纤维素/石墨烯氧化物/金银 (NCF/GO/Au@Ag) 纳米复合基底提供了对多环芳 (PAH) 的高度敏感和稳定的检测. 这种SERS基底实现了PAHs的低检测极限,保护环境和人类健康.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
分析化学分析化学

背景情况:

多环芳 (PAH) 对生态系统和人类健康构成重大风险.
对PAHs的敏感和稳定的检测方法对于环境监测和风险评估至关重要.

研究的目的:

开发一种高性能表面增强拉曼光谱 (SERS) 基板,用于敏感且稳定地检测PAHs.
为了研究纳米纤维素 (NCF),石墨烯氧化物 (GO) 和SERS基质中的Au@Ag核心纳米棒的协同效应.

主要方法:

制造NCF/GO/Au@Ag纳米复合材料的SERS基板.
使用Au@Ag纳米棒的局部表面等离子体共振 (LSPR) 和从GO的界面电荷转移.
采用有限元模拟和实验研究来优化基质性能.
评估PAH检测的基质灵敏度,稳定性和可重复性.

主要成果:

该NCF/GO/Au@Ag基质表现出双等离子共振,与785nm激发最佳匹配,达到5.21 × 10^5.5的增强因子.
通过界面电荷转移,GO集成使拉曼信号增加了1.68倍.
加入NCF显著改善了纳米粒子分散,并将信号相对标准偏差 (RSD) 从36.88%降至4.29%.
基质达到PAHs的低检测极限10μg/L.

结论:

开发的NCF/GO/Au@Ag纳米复合材料SERS基质在检测PAH方面表现出极高的灵敏度和可重复性.
NCF,GO和Au@Ag纳米棒的协同组合为PAHs的环境监测提供了一个有希望的平台.
这种先进的SERS基板为保护生态系统和人类健康免受PAH污染提供了宝贵的工具.

关键词:

转移费用转移费用转移费用转移费用局部化的表面等离子体共振 (LSPR)纳米纤维素 (NCF) 的使用多环芳 (PAHs) 是一种多环芳.表面增强的拉曼光谱 (SERS)

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