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Analytical Letters Volume 39, 2006 - Issue 6
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Luminescense Spectroscopy

Development of Novel Quantum Dots as Fluorescent Sensors for Application in Highly Sensitive Spectrofluorimetric Determination of Cu2+

Yan Lai School of Chemistry and Environment, South China Normal University, Guangzhou, China
,
Ying Yu School of Chemistry and Environment, South China Normal University, Guangzhou, ChinaCorrespondence[email protected]
,
Ping Zhong School of Chemistry and Environment, South China Normal University, Guangzhou, China
,
Jianzhong Wu School of Chemistry and Environment, South China Normal University, Guangzhou, China
,
Zhaoyang Long Center for Disease Control and Prevention of Guangdong Province, Guangzhou, China
&
Chunsui Liang Center for Disease Control and Prevention of Guangdong Province, Guangzhou, China
Pages 1201-1209 | Received 13 Nov 2005, Accepted 19 Jan 2006, Published online: 25 Oct 2011
 
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Abstract

Quantum dots (QDs), semiconductor particles that have all three dimensions confined to the nanometer length scale are a good choice for the detection of heavy metals in aqueous media. In this study, novel CdSe/CdS QDs modified by mercaptoethanol were synthesized for Cu2+ detection, which shows high selectivity and sensitivity towards Cu2+ in the presence of other biological metallic ions. The detection mainly depends on the binding of Cu2+ onto the surface of QDs resulting in a chemical displacement of Cd2+. The subsequent formation of CuSe, and its application in hair and tea samples was also performed successfully.

Acknowledgments

The present work was supported by the Natural Science Foundation of Guangdong Province (No. 04010369).

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Related Research Data

Luminescent Sensing with Quantum Dots
Source: Springer Science and Business Media LLC
Organically Modified Quantum Dots in Chemical and Biochemical Analysis
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