材料科学
拉曼光谱
基质(水族馆)
拉曼散射
银纳米粒子
紫外线
辐照
纳米棒
罗丹明6G
分析化学(期刊)
光电子学
纳米技术
纳米颗粒
光学
分子
化学
色谱法
有机化学
核物理学
地质学
物理
海洋学
作者
Ning Sun,Zhenyin Lv,Yong Zhu,Jie Zhang
摘要
We report a low-cost fabrication strategy to prepare a large-area carbon fiber cloth (CFC) coated by Ag nanoparticles (AgNPs) as a flexible surface-enhanced Raman scattering substrate. AgNPs were deposited on a hydrophilized CFC by ultraviolet (UV) irradiation of AgNO 3 solution, named UV-AgNPs@CFC. The UV irradiation duration and AgNO 3 solution concentration can affect the AgNPs structure. SERS property is investigated using rhodamine 6 G (R6G) and crystal violet (CV) as standard analytes and the detection concentration level is down to 10 −10 mol/L. The analytical enhancement factor can reach 1.22 × 10 9 . Also, the substrate has remarkable stability and uniformity; the relative standard deviation (RSD) of the characteristic peak calculated at 611cm −1 is 14.4%. Additionally, the UV-AgNPs@CFC substrate can detect two different molecules simultaneously. Our flexible SERS substrate enables efficient molecular extraction and Raman measurements on the curved surface of apples. The detection concentration level for CV is down to 10 −5 mol/L. Moreover, the electric field distribution of the hybrid structure is simulated by the finite difference time domain and COMSOL Multiphysics software, and the maximal electric field intensity is 25.7 V/m. Meanwhile, we deposited AgNPs on the TiO 2 nanorods-modified CFC (TiO 2 -CFC) by UV irradiation. A reusable self-cleaning UV-AgNPs@TiO 2 -CFC substrate was fabricated.
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