表面等离子共振
材料科学
拉曼散射
拉曼光谱
辐照
基质(水族馆)
激光器
共振(粒子物理)
分析化学(期刊)
薄膜
等离子体子
表面等离子体子
纳米颗粒
光电子学
化学
光学
纳米技术
原子物理学
地质学
物理
核物理学
色谱法
海洋学
作者
Jiawei Wang,Qiankun Huang,Wenjie Zhao,Weijian Zeng,Qiaoyi Yan,Mouxin Wang,Ruijin Hong,Chunxian Tao,Qi Wang,Hui Lin,Zhaoxia Han,Dawei Zhang
出处
期刊:Vacuum
[Elsevier]
日期:2023-12-01
卷期号:218: 112632-112632
被引量:1
标识
DOI:10.1016/j.vacuum.2023.112632
摘要
A series of defective MoO2-x/Mo films were prepared by laser modification. Oxygen vacancy defects were introduced to improve the charge transfer efficiency between the probe molecules and the substrate. The formation of nanoparticles on the surface of the laser-treated samples promoted the localized surface plasmon resonance properties, which ultimately induced the enhancement of the local electric field on the sample surface. The dual mechanisms of chemical and electromagnetic enhancement together determine the Raman scattering signal intensity. The as-treated MoO2-x/Mo thin films show good uniformity and reproducibility in surface-enhanced Raman spectroscopy measurements, with detection limits and enhancement factors of 10−9 mol/L and 2.68 × 105 for the dye methylene blue, respectively.The results of the finite-difference-time-domain simulations are in good agreement with the experimental results.
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