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Controllable synthesis and characterization of highly fluorescent silver nanoparticles

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Abstract

Highly fluorescent silver nanoparticles (AgFNPs) have been prepared by microemulsion method and the sizes of AgFNPs were controlled by altering the molar ratio (ω) of water-to-surfactant in the water-in-oil microemulsion. The results were shown that the AgFNPs sizes increased with incremental molar ratio (ω) of water-to-surfactant. The AgFNPs have been characterized by transmission electron microscopy, dynamic light scattering, fluorescence and absorption spectroscopy, and fluorescence lifetime study. Study of the spectral characteristics was shown that the absorbance of AgFNPs increased significantly with the ω, and linear relationship between absorbance and the size of AgFNPs was observed. The increase of AgFNPs size caused a red shift of maximum absorption wavelength in the UV–Vis spectra, and the relationship between maximum absorption wavelength and AgFNPs size appeared linear dependence. The maximum fluorescence emission wavelength did not shift with the change of particles size, but the emission intensity increases with the ω. The results were shown that the other factors to affect the fluorescence properties of AgFNPs were the surface properties and microstructure, except the AgFNPs size. These surface properties depend upon the stabilizing agent, reactant concentration, and solvents and so on.

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Acknowledgments

This research is financially supported by the National High-Tech Research and Development Plan of China (“863” plan, No. 2011AA06A107), the National Nature Science Foundation of China (21273073 and 21073063), and the Fundamental Research Funds for the Central Universities, China (No. WK0913002).

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Authors and Affiliations

  1. School of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210046, China

    Jun Lin Li, Xue Qing An & Yin Yan Zhu

  2. School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

    Xue Qing An

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  1. Jun Lin Li
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  2. Xue Qing An
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Correspondence to Xue Qing An.

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Li, J.L., An, X.Q. & Zhu, Y.Y. Controllable synthesis and characterization of highly fluorescent silver nanoparticles. J Nanopart Res 14, 1325 (2012). https://doi.org/10.1007/s11051-012-1325-3

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  • DOI: https://doi.org/10.1007/s11051-012-1325-3

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