Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 207, Issue -, Pages 552-555Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.10.112
Keywords
Near-infrared electrochemiluminescence; Anodic; CdTe/CdS core(small)/shell(thick) quantum dots; Cu2+; Quenching effect
Funding
- National Natural Science Foundation of China [21405139]
- Zhejiang University of Technology [101010629]
- Hubei Education Department [Q20122701]
- Huanggang Normal University [2013031803]
Ask authors/readers for more resources
Anodic near-infrared electrochemiluminescence (NECL) from 3-mercaptopropionic acid (MPA)-capped CdTe/CdS core(small)/shell(thick) quantum dots (QDs) without any co-reactants were studied in aqueous solution for the first time. A stable and intensive anodic NECL emission at +1.32 V with an onset potential of +0.84 V was observed in pH 7.4 PBS at an indium tin oxide electrode, which results from the annihilation process between the oxidation products of QDs and the produced QDs anions. Various influencing factors, such as pH, electrolyte, scan rates and electrode materials on the NECL were investigated. Based on the selective quenching by Cu2+ to the NECL emission from the QDs, a simple and sensitive method for the determination of Cu2+ was developed. Moreover, as a practical application, the proposed method was used to monitor Cu2+ level in lake water and milk with satisfactory results obtained. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available