ZnSe quantum dots based fluorescence sensors for Cu2+ ions

被引：46

作者：

Wu, Dudu ^{[1
]}

Chen, Zhi ^{[2
]}

Huang, Guobin ^{[3
]}

Liu, Xinguang ^{[3
]}

机构：

[1] Guangdong Med Coll, Sch Pharm, Dongguan 523808, Peoples R China

[2] Guangdong Med Coll, Ctr Anal, Dongguan 523808, Peoples R China

[3] Guangdong Med Coll, Guangdong Prov Key Lab Med Mol Diagnost, Inst Aging Res, Dongguan 523808, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2014年 / 205卷

基金：

中国国家自然科学基金;

关键词：

ZnSe quantum dots; Fluorescence intensity; Probe; Copper analysis; CADMIUM; NANOCRYSTALS; COPPER; PHOTOLUMINESCENCE; SEAWATER; NANOPARTICLES; LEAD; PH;

D O I：

10.1016/j.sna.2013.10.020

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Water soluble ZnSe quantum dots (QDs) modified by mercaptoacetic acid (MAA) were used as selective copper ions probes by fluorescence spectroscopic technique. The results showed that the fluorescence of the water-soluble ZnSe QDs could be quenched only by Cu2+ in physiological buffer solution. The optimum fluorescence intensity was found to be at pH 7.0 with a temperature of 25 degrees C. Under these optimum conditions, the detection limit of Cu2+ ions was 4.70 x 10(-7) mol L-1. The effect of foreign ions on the fluorescence intensity of ZnSe QDs was also studied and foreign ions showed low interference response in detecting of Cu2+ ions. Moreover, the quenching was discussed to be a static quenching procedure, which was proved by quenching rate constant K-q (2.29 x 10(13) L mol(-1) s(-1)). (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：72 / 78

页数：7

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