Interaction of water-soluble thiol capped CdTe quantum dots and bovine serum albumin

被引：125
作者：
Idowu, Mopelola [1 ]
Lamprecht, Emmanuel [1 ]
Nyokong, Tebello [1 ]
机构：
[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2008年 / 198卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
quantum dots; bovine serum albumin; cysteine; thioglycolic acid; mercaptopropionic acid; cadmium tellurium;
D O I：
10.1016/j.jphotochem.2008.02.008
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：
Luminescent water-soluble CdTe quantum dots (QDs) capped with different thiol carboxylic acids were synthesized in aqueous medium and then cross linked to bovine serum albumin (BSA) with 1-ethyl-3-(3 -dimethylaminopropyl) carbodiimide hydrochloride (EDC). Enhancement Of fluorescence emission intensity occurred for QDs in the presence of bovine serum albumin (BSA, mixed or linked) signifying inhibition of non-radiative recombination of the surface vacancies. Fluorescence studies reveal a positive deviation behaviour suggesting the occurrence of static and dynamic mechanisms of quenching together which was accounted for by the modified Stern-Volmer equation. (c) 2008 Elsevier B.V. All rights reserved.
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收藏
页码：7 / 12
页数：6
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