Abstract
Surface-enhanced Raman scattering (SERS) is widely employed because it offers quick, microscopic, and traceless detection. This study used high-voltage and low-voltage ultrasonic oscillation to embed gold-silver nanoparticles (Au-Ag NPs) into the pores of chemically modified ultrathin anodic alumina (AAO) films, resulting in a highly sensitive three-dimensional SERS substrate. We improved the substrate’s stability and Raman activity by adjusting the particle alloy ratio. For the substrate in this alloy ratio, the Raman signal of probe molecules (Rh6G) adsorbed on the substrate surface is enhanced. the enhancement factor (EF) was as high as 1.40 × 107, the relative standard deviation (RSD) of 10.6%, and the concentration of Rh6G shows a linear relationship with Raman intensity, with a linear correlation coefficient of 0.961. In addition, we evaluated the substrate’s detection effect on thiram molecules. It has been proven that this structure has good practicality and high sensitivity as a Raman enhanced substrate.
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Funding
This work was financially supported by the National Science Foundation of China (12274341, 12004304), the Shaanxi Province Natural Science Foundation of China (2022JZ-05), the Shaanxi Provincial Research Plan for Young Scientific and Technological New Stars (2021KJXX-45), and the Key R & D project of Shaanxi Province (2022SF-333).
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Jun Dong put forward ideas, design the experiment and revised the manuscript; Chenlu Li and Yan Wang performed the experiment and wrote the main manuscript text; Yi Cao and Yimeng Fan help to perform the experiment; Qingyan Han, Wei Gao, and Jianxia Qi help to revised the manuscript; and Yongkai Wang performed the simulation work.
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Dong, J., Li, C., Wang, Y. et al. Assembly Nanoparticle Arrays Decorated with Ultrathin AAO Nanopores for Highly Sensitive SERS Substrate. Plasmonics 19, 777–784 (2024). https://doi.org/10.1007/s11468-023-02004-7
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DOI: https://doi.org/10.1007/s11468-023-02004-7