光谱学与光谱分析 |
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Effects of Silver Nanoparticles on Fluorescent Properties of Fluorescein |
WANG Yue-hui,ZHOU Ji*,WANG Ting |
State Key Lab of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China |
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Abstract The effects of silver nanoparticles on the fluorescent properties of the fluorescein in aqueous solution were investigated in the present paper. The fluorescein-coated silver nanoparticles form Fln-Ag complexes,leading to a net-like structure among silver nanoparticles. The fluorescent intensity of the fluorescein was enhanced due to the energy transfer from silver nanoparticles to fluorescein owing to the local field enhancement brought by the surface plasmon resonance of silver nanoparticles. Furthermore,with the increase in silver nanoparticle concentrations the fluorescence enhancement efficiency has a maximum. The larger-size silver nanoparticles have a maximum enhancement efficiency in the lower concentration region. The energy transfer between the fluorescein and silver nanoparticles depends on the local field enhancement around the fluorescein,the nonradiative energy transfer,the silver nanoparticles concentration and size.
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Received: 2006-05-26
Accepted: 2006-08-28
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Corresponding Authors:
ZHOU Ji
E-mail: zhouji@mail.tsinghua.edu.cn
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Cite this article: |
WANG Yue-hui,ZHOU Ji,WANG Ting. Effects of Silver Nanoparticles on Fluorescent Properties of Fluorescein[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(08): 1555-1559.
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https://www.gpxygpfx.com/EN/Y2007/V27/I08/1555 |
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