期刊
MICROCHIMICA ACTA
卷 186, 期 7, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-019-3543-1
关键词
Hot spot; Network; Pesticides; Food safety; Teaanalysis; Nanotechnology
资金
- National Natural Science Foundation of China [81472001]
- Tongjiang Scholars Program of Quanzhou City, Natural Science Foundation of Fujian Province [2015 J05030]
- Quanzhou City Science & Technology Program of China [2017G023]
The authors describe a three-dimensional (3D) flexible interconnected porous nanocomposite membrane for use in surfaceenhanced Raman scattering (SERS). It was obtained via in -situ deposition of gold nanoparticles (AuNPs, ca. 10 nm) on eggshell membranes (ESM). The AuNP/ ESMnanocomposites were used as a SERS substrate for detection of the pesticide thiabendazole (TBZ) with prominent Raman bands at 1180, 1280, and 1580 cm-1. The abundant Bhot spots<^> are generated by the closely arranged AuNPs in the 3D geometry of the ESM networks. This makes the SERS substrate highly sensitive because of remarkable signal amplification. The substrates were applied to the rapid detection of TBZ in Oolong tea. The limit of detection for TBZ is 0.1 ppm.
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