| 不同粒径金纳米微粒对荧光素钠的猝灭效应研究 |
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| 引用本文： | 郭艳丽,阎宏涛,裴若会.不同粒径金纳米微粒对荧光素钠的猝灭效应研究[J].光谱学与光谱分析,2008,28(2):380-383. |
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| 作者姓名： | 郭艳丽 阎宏涛 裴若会 |
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| 作者单位： | 西北大学化学系，陕西 西安 710069 |
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| 摘 要： | 采用柠檬酸盐合成法制备了不同粒径的金纳米微粒，用吸收光谱和透射电镜对金纳米微粒进行了表征。研究了不同粒径金纳米微粒与荧光素钠分子的相互作用。发现金纳米微粒对荧光素钠具有荧光猝灭效应, 并且其荧光猝灭程度与金纳米微粒的粒径大小有关。随着金纳米微粒粒径的减小，荧光猝灭程度增大。探讨了金纳米微粒对荧光素钠荧光猝灭的机理，表明该荧光猝灭为动态猝灭。
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| 关 键 词： | 金纳米微粒 荧光素钠 荧光猝灭 猝灭机理 |
| 文章编号： | 1000-0593（2008）02-0380-04 |
| 收稿时间： | 2006-10-08 |
| 修稿时间： | 2007-01-09 |
Quenching Effect of Gold Nanoparticles for Fluorescein Sodium |
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| GUO Yan-li,YAN Hong-tao,PEI Ruo-hui.Quenching Effect of Gold Nanoparticles for Fluorescein Sodium[J].Spectroscopy and Spectral Analysis,2008,28(2):380-383. |
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| Authors: | GUO Yan-li YAN Hong-tao PEI Ruo-hui |
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| Institution: | Department of Chemistry, Northwest University, Xi’an 710069, China |
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| Abstract: | The spectroscopic characteristic of interaction of fluorescein sodium and gold nanoparticles with different sizes was investigated via UV-Vis and fluorescence spectrophotometry.It was shown that fluorescein sodium adsorbed respectively onto the different sized gold nanoparticle surface suffers different extent of quenching of their fluorescence.The quenching efficiency is different for different sized gold nanoparticles.It was found that smaller gold nanoparticles are more efficient quenchers due to their larger surface areas.The quenching mechanism was discussed.It was a dynamic quenching. |
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| Keywords: | Gold nanoparticles Fluorescein sodium Fluorescence quenching Quenching mechanism |
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