期刊
MICROCHEMICAL JOURNAL
卷 170, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2021.106662
关键词
Absorbent cotton; In-situ growth; SERS; Pesticide residue; Food
资金
- Science Research Project of Education Department of Liaoning Province of China [L2019011]
- talent scientific research fund of LSHU [2017XJJ-037]
A simple method for fabricating plasmonic absorbent cotton fibers dyeing with Ag NPs was reported. The Ag NPs were densely immobilized on the cotton surface, providing additional enhancement sensitivity in SERS sensing. The plasmonic cotton-Ag SERS substrate showed multiplex sensing capability for identifying pesticides from their mixture.
We report on a simple method for fabricating plasmonic absorbent cotton fibers conformally dyeing with Ag NPs to be used as surface-enhanced Raman scattering (SERS) substrates. The Ag NPs were integrated on the surface of cotton by a process in which Ag-NP seeds were immobilized on cotton via electroless deposition. Scanning electron microscope, transmission electron microscopy imaging as well as elemental mapping analysis provided evidence that the Ag NPs were densely immobilized on the surface of cotton. By controlling the amount of AgNO3 in growth media, the optimal SERS absorbent cotton-Ag was obtained by using 20 mM of AgNO3. The high absorbency of cotton could enrich the analyte concentration within 3 min, which brings additional enhancement sensitivity in SERS sensing. In addition, the mechanical flexibility of plasmonic cotton-Ag SERS substrate makes it suitable for swiping the SERS substrate on the surface of apple, the limit of detection of thiram from apple was lower than 0.1 ppm. Finally, the multiplex sensing capability of the plasmonic cotton was demonstrated by identifying pesticides from their mixture.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据