Highly sensitive SERS detection of melamine based on 3D Ag@porous silicon photonic crystal

被引：8
作者：
Li, Wei [1 ,2 ]
Dai, Shijie [1 ]
Li, Xiang [3 ]
Li, Qianjin [1 ]
Li, Jianlin [1 ]
机构：
[1] Nanjing Normal Univ, Sch Food Sci & Pharmaceut Engn, Nanjing 210023, Peoples R China
[2] Jinan Univ, Affiliated Hosp 1, Med Imaging Ctr, Guangzhou 510630, Guangdong, Peoples R China
[3] Shaanxi Univ Sci & Technol, Sch Food Sci & Engn, Xian 710016, Shaanxi, Peoples R China
来源：
TALANTA | 2024年 / 280卷
基金：
中国国家自然科学基金;
关键词：
SERS detection; Melamine; Porous silicon photonic crystal; 3D SERS substrate; Food safety; ENHANCED RAMAN-SCATTERING; MILK; SUBSTRATE;
D O I：
10.1016/j.talanta.2024.126789
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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 x 10(8). The 3D SERS detection platform showed a wide linear detection range of 10(-4)similar to 10 mg L-1 and a low limit of detection of 0.1 mu g L-1 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.
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页数：7
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