Energy-level-related response of cathodic electrogenerated- chemiluminescence of self-assembled CdSe/ZnS quantum dot films

Bao, L, Sun, L, Zhang, Z, Jiang, P, Wise, F, Abruna, H and Pang, D 2011, 'Energy-level-related response of cathodic electrogenerated- chemiluminescence of self-assembled CdSe/ZnS quantum dot films', Journal of Physical Chemistry C, vol. 115, no. 38, pp. 18822-18828.


Document type: Journal Article
Collection: Journal Articles

Title Energy-level-related response of cathodic electrogenerated- chemiluminescence of self-assembled CdSe/ZnS quantum dot films
Author(s) Bao, L
Sun, L
Zhang, Z
Jiang, P
Wise, F
Abruna, H
Pang, D
Year 2011
Journal name Journal of Physical Chemistry C
Volume number 115
Issue number 38
Start page 18822
End page 18828
Total pages 7
Publisher American Chemical Society
Abstract A strategy for construction of a solid-state electrogenerated chemiluminescence (ECL) sensor based on a self-assembled film of core/shell structural CdSe/ZnS quantum dots (QDs) is presented in this work for the first time. The surface coverage of CdSe/ZnS QDs is about 2.2 × 10 12 NPs/cm 2 , which is on the level of a submonolayer. This self-assembled CdSe/ZnS QD film has shown a strong and efficient cathodic ECL with peroxydisulfate and hydroperoxide as coreactants in aqueous solution. The quenching effect with hydroperoxide as the coreactant reveals an energy-level-related mechanism for the QD ECL processes. The energy levels of QDs and coreactants determine ECL responses. This insight provides a universal guide to select proper coreactants for the QD ECL sensors. In addition, the self-assembled CdSe/ZnS QD ECL sensor has the potential to detect energy-level-related analytes, such as dopamine.
Subject Electroanalytical Chemistry
Nanomaterials
Keyword(s) Aqueous-Solution
Anodic Electrochemiluminescence
Semiconductor Nanocrystals
Covalent Modification
Sensing Application
Carbon Electrodes
CDS Nanoparticles
Electrochemistry
DNA
Coreactant
DOI - identifier 10.1021/jp205419z
Copyright notice © 2011 American Chemical Society.
ISSN 1932-7447
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