Manganese modified CdTe/CdS quantum dots as a highly selective probe to detect trace copper element in beer samples
Manganese modified CdTe/CdS quantum dots as a highly selective probe to detect trace copper element in beer samples
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锰修饰的 CdTe/CdS 量子点作为高选择性探针检测啤酒样品中的痕量铜元素
DOI：
10.1039/c2ay05794h
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发表时间：
2012-05
影响因子：
3.1
通讯作者：
Hu Qin
中科院分区：
文献类型：
--
作者：
Cai Zheng;Yang Jing;Li Lei;Hu Qin
This paper describes the investigation of manganese modified CdTe/CdS quantum dots as a fluorescence probe for trace copper detection. Manganese modified CdTe/CdS quantum dots were prepared in aqueous solution and were characterized by ultraviolet-visible absorbance, fluorescence spectra, transmission electron microscopy and X-ray diffraction. The as-synthesized manganese modified CdTe/CdS QDs presented a high photoluminescence quantum yield of 84%. The functionalized nanoparticles were used as a fluorescence probe for Cu2+. The interference study demonstrated that the normal foreign ions, such as Na+, Mg2+, Al3+et al., had very low interference for the detection of Cu2+, and the calibration plot of F0/F versus concentration of Cu2+ was linear in the range of 5.0 × 10−9 to 5.0 × 10−7 mol L−1 with a correlation coefficient of 0.9991. The ultrasensitive fluorescence probe built was directly applied to the detection of trace copper element in beer samples with satisfactory results.
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