Key Laboratory of Food Nutrition and Functional Food of Hainan Province, School of Food Science and Engineering, Hainan University, Haikou, 570228, Hainan, China.
School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, 999077, Hong Kong, China.
Mikrochim Acta. 2024 Mar 28;191(4):222. doi: 10.1007/s00604-024-06292-6.
A lightweight, portable, low-cost, and accessible cotton swab was employed as surface enhanced Raman spectroscopy (SERS) matrix template. The silver nanoflowers were in situ grown on the surface of cotton swabs to form three-dimensional Ag nanoflower@cotton swabs (AgNF@CS) SERS substrate with high-density and multi-level hot spots. The SERS performance of AgNFs@CS substrates with various reaction time was systematically studied. The optimal AgNF-120@CS SERS substrate exhibits superior detection sensitivity of 10 M for methylene blue, good signal reproducibility, high enhancement factor of 1.4 × 10, and excellent storage stability (over 30 days). Moreover, the AgNF-120@CS SERS substrate also exhibits prominent detection sensitivity of 10 M for food colorant of carmine. Besides, the portable AgNF-120@CS SERS substrate is also capable of detecting food colorant residues on irregular food surfaces.
一种轻便、便携、低成本且易于获取的棉签被用作表面增强拉曼光谱 (SERS) 基质模板。银纳米花原位生长在棉签表面，形成具有高密度和多层次热点的三维 Ag 纳米花@棉签 (AgNF@CS) SERS 基底。系统研究了不同反应时间的 AgNFs@CS 基底的 SERS 性能。最佳的 AgNF-120@CS SERS 基底对亚甲蓝表现出优异的检测灵敏度，为 10M，具有良好的信号重现性、1.4×10 的高增强因子和出色的存储稳定性（超过 30 天）。此外，AgNF-120@CS SERS 基底对食用色素胭脂红也表现出突出的 10M 检测灵敏度。此外，便携式 AgNF-120@CS SERS 基底还能够检测不规则食物表面上的食用色素残留。
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