Abstract
Silver nanoplates were prepared in a dual reduction system with NaBH4 and sodium citrate both as reducing agents. And then the as-prepared nanoplates could be growing up through multistage growth methodology. The average edge length of Ag nanoplates can be tailored from 40 nm to 260 nm without changing their shape, crystallinity, and the average thickness. Furthermore, the effectiveness of these silver nanoplates as substrates prepared by the silanization self-assembly method toward surface-enhanced Raman scattering (SERS) detection was evaluated by using 4-aminothiophenol (4-ATP) and rhodamine 6G (R6G) as probe molecules. It was found that the enhancement ability of the silver nanoplates film is remarkable lower than that of the spherical silver nanoparticle film. The reason is attributed to the electromagnetic mechanism and chemical mechanism. This work will be of great significance in understanding the SERS enhancement mechanism and in the fabrication of nanoparticle films for biosensing.
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Acknowledgements
The work was supported by the State Key Development Program for Basic Research of China (Grant No. 9140C6805021008), the Science and Technology Development Foundation of Chinese Academy of Engineering Physics (Grant No. 2010B0401055), and the Open-End Fund for the Valuable and Precision Instruments of Central South University.
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Yi, Z., Xu, X., Wu, X. et al. Silver nanoplates: controlled preparation, self-assembly, and applications in surface-enhanced Raman scattering. Appl. Phys. A 110, 335–342 (2013). https://doi.org/10.1007/s00339-012-7256-0
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DOI: https://doi.org/10.1007/s00339-012-7256-0