期刊
ELECTROCHIMICA ACTA
卷 157, 期 -, 页码 8-14出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.01.073
关键词
Quantum Dots; Electrochemiluminescence; Biosensor; Cholesterol
资金
- European Union 7th Framework programme, Marie Curie Reintegration Grant [PIRG-2010-268236]
This contribution examines the application of near infra-red (NIR) quantum dot (QD) containing films for cholesterol detection. Water-soluble, 2-(dimethylamino) ethanthiol (DAET) protected 800 nm CdSeTe/ZnS core-shell QDs were prepared and incorporated into a chitosan film. The NIR electrogenerated chemiluminescence (ECL) of the QD/chitosan films upon reaction with H2O2 co-reactant (produced as a by-product of cholesterol oxidase-catalysed oxidation of cholesterol) gave a strong ECL signal at -1.35V vs. Ag/AgCl. The sensor displayed a linear response over the clinically relevant range (0.25 <= [cholesterol] <= 5 mM) allowing the rapid detection of cholesterol and providing a platform for future development. Significantly, this NIR emission has been shown to exhibit excellent penetrability through biological samples, and will likely be at the forefront of development in the biosensing and imaging fields for the foreseeable future. (C) 2015 Elsevier Ltd. All rights reserved.
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