Energy-Level-Related Response of Cathodic Electrogenerated-Chemiluminescence of Self-Assembled CdSe/ZnS Quantum Dot Films

被引：45

作者：

Bao, Lei ^{[1
,2
,3
]}

Sun, Liangfeng ^{[4
,5
]}

Zhang, Zhi-Ling ^{[2
,3
]}

Jiang, Peng ^{[2
,3
]}

Wise, Frank W. ^{[4
]}

Abruna, Hector D. ^{[1
]}

Pang, Dai-Wen ^{[2
,3
]}

机构：

[1] Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

[2] Wuhan Univ, Coll Chem & Mol Sci,Minist Educ, Res Ctr Nanobiol & Nanomed MOE Innovat Platform 9, State Key Lab Virol,Key Lab Analyt Chem Biol & Me, Wuhan 430072, Peoples R China

[3] Wuhan Univ, Wuhan Inst Biotechnol, Wuhan 430072, Peoples R China

[4] Cornell Univ, Sch Appl & Engn Phys, Ctr Nanoscale Syst, Ithaca, NY 14853 USA

[5] Bowling Green State Univ, Dept Phys & Astron, Bowling Green, OH 43403 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 38期

基金：

中国国家自然科学基金;

关键词：

AQUEOUS-SOLUTION; ANODIC ELECTROCHEMILUMINESCENCE; SEMICONDUCTOR NANOCRYSTALS; COVALENT MODIFICATION; SENSING APPLICATION; CARBON ELECTRODES; CDS NANOPARTICLES; ELECTROCHEMISTRY; DNA; COREACTANT;

D O I：

10.1021/jp205419z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 x 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.

引用

页码：18822 / 18828

页数：7

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