Sensitive Hg (II) ion detection by fluorescent multilayer films fabricated with quantum dots
Sensitive Hg (II) ion detection by fluorescent multilayer films fabricated with quantum dots
复制标题
利用量子点制造的荧光多层膜进行灵敏的 Hg (II) 离子检测
DOI:
10.1016/j.snb.2009.03.012
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发表时间:
2009-06
期刊:
影响因子:
--
通讯作者:
Xingguang Su
中科院分区:
文献类型:
--
作者:
Yan Wang;Nan Lou;Qiang Ma;Xingguang Su
Stable, monodisperse CdTe quantum dots (QDs) capped with mercaptosuccinic acid were prepared facilely in aqueous medium, which were deposited on the quartz slides to form multilayer films by electrostatic interactions with poly(dimethyldiallyl ammonium chloride) (PDDA). The PDDA/QDs multilayer films are easily fabricated and show high photostability. The fluorescence of the multilayer films could be quenched effectively by Hg (II) ions without obvious shift in maximum photoluminescence emission wavelength, which can be used for the detection of Hg (II) ions. The electron transfer process between the capping ligands and Hg (II) ions should be mainly responsible for the remarkable quenching effect of Hg (II) ions. Under optimal conditions, the quenched fluorescence intensities of multilayer films are perfectly described by modified Stern–Volmer equation with the concentration of Hg (II) ions ranging from 0.01μM to 1μM.
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影响因子:
7.4
作者:
Chen, YF;Rosenzweig, Z
通讯作者:
Rosenzweig, Z
影响因子:
4.2
作者:
Liang, JG;Ai, XP;Pang, DW
通讯作者:
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DOI:
10.1039/b801963k
发表时间:
2008-06
期刊:
The Analyst
影响因子:
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作者:
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通讯作者:
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15
作者:
Hennrich, G;Sonnenschein, H;Resch-Genger, U
通讯作者:
Resch-Genger, U
影响因子:
3.9
作者:
Isarov, AV;Chrysochoos, J
通讯作者:
Chrysochoos, J