材料科学
石墨烯
基质(水族馆)
拉曼散射
拉曼光谱
等离子体子
表面等离子共振
图层(电子)
罗丹明B
复合数
光电子学
纳米技术
贵金属
半导体
化学工程
金属
光催化
复合材料
光学
纳米颗粒
催化作用
工程类
化学
冶金
生物化学
地质学
物理
海洋学
作者
Linyu Mei,Z. N. Wang,Yan Niu,Wen Deng,Yu Shao
出处
期刊:Optics Express
[The Optical Society]
日期:2023-08-22
卷期号:31 (18): 29768-29768
被引量:1
摘要
Graphene(G)-noble metal-ZnO hybrid systems were developed as highly sensitive and recyclable surface enhanced Raman scattering (SERS) platforms, in which ultrathin graphene of varying thickness was embedded between two metallic layers on top of a ZnO layer. Due to the multi-dimensional plasmonic coupling effect, the Au/G/Ag@ZnO multilayer structure possessed ultrahigh sensitivity with the detection limit of Rhodamine 6 G (R6G) as low as 1.0×10 −13 mol/L and a high enhancement factor of 5.68×10 7 . Both experimental and simulation results showed that graphene films could significantly regulate the interlayer plasmon resonance coupling strength, and single-layer graphene had the best interlayer regulation effect. Additionally, the SERS substrate structure prepared through physical methods exhibited high uniformity, the graphene component of the substrate possessed excellent molecular enrichment ability and silver oxidation inhibition characteristics, resulting in a substrate with high stability and exceptional reproducibility. The signal change was less than 15%. Simultaneously, due to the excellent photocatalytic performance of the low-cost and wide-band-gap semiconductor material ZnO, the SERS substrate exhibited exceptional reusability. Even after five cycles of adsorption-desorption, the SERS performance remained stable and maintained a reliable detection limit. The study introduced a novel approach to creating multilayer composite SERS substrates that exhibited exceptional performance, offering a new analytical tool with high sensitivity, stability, and reusability.
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