基于三维银@多孔硅光子晶体的三聚氰胺高灵敏度表面增强拉曼散射检测
Highly sensitive SERS detection of melamine based on 3D Ag@porous silicon photonic crystal.
作者信息
Li Wei, Dai Shijie, Li Xiang, Li Qianjin, Li Jianlin
机构信息
School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China; Medical Imaging Center, the First Affiliated Hospital, Jinan University, Guangdong, 510630, China.
School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China.
出版信息
Talanta. 2024 Dec 1;280:126789. doi: 10.1016/j.talanta.2024.126789. Epub 2024 Aug 29.
The stability, reproducibility and engineering of SERS substrate faces a great challenge in melamine SERS assay. In this work, a simple, highly sensitive, stable and cost-efficient SERS detection platform for melamine was established based on its Raman fingerprints spectrum. The Ag@ porous silicon photonic crystal (Ag@PPC) was prepared as the 3D SERS substrate by electrochemical etching and magnetron sputter technology. The main influence factors for the preparation of SERS substrate were investigated in detail. The analytical enhancement factor of the 3D SERS substrate can reach to 2.6 × 10. The 3D SERS detection platform showed a wide linear detection range of 10∼10 mg L and a low limit of detection of 0.1 μg L for melamine. Moreover, such detection platform showed good stability, high reproducibility and high recovery rates for melamine. The 3D Ag@PPC SERS substrate can be easily prepared and engineered, displaying a great potential application in food safety field.
在三聚氰胺表面增强拉曼光谱（SERS）检测中，SERS 基底的稳定性、重现性和可加工性面临巨大挑战。在本工作中，基于三聚氰胺的拉曼指纹光谱，建立了一种简单、高灵敏、稳定且经济高效的三聚氰胺 SERS 检测平台。采用电化学刻蚀和磁控溅射技术制备了 Ag@多孔硅光子晶体（Ag@PPC）作为三维 SERS 基底。详细研究了 SERS 基底制备的主要影响因素。该三维 SERS 基底的分析增强因子可达 2.6×10。该三维 SERS 检测平台对三聚氰胺的线性检测范围宽，为 10∼10 mg L，检测限低至 0.1 μg L。此外，该检测平台对三聚氰胺表现出良好的稳定性、高重现性和高回收率。三维 Ag@PPC SERS 基底易于制备和加工，在食品安全领域显示出巨大的潜在应用价值。
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