Study of the interaction between CdSe/ZnS core-shell quantum dots and bovine serum albumin by spectroscopic techniques

被引：59
|
作者：
Dzagli, Milohum Mikesokpo [1 ,2 ,3 ]
Canpean, Valentin [1 ,2 ]
Iosin, Monica [1 ,2 ]
Mohou, Messanh Agbeko [3 ]
Astilean, Simion [1 ,2 ]
机构：
[1] Univ Babes Bolyai, Fac Phys, Cluj Napoca 400271, Romania
[2] Nanobiophoton Ctr, Inst Interdisciplinary Expt Res Bionanosci, Cluj Napoca 400271, Romania
[3] Univ Lome, Lab Phys Composants Semicond, Lome, Togo
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2010年 / 215卷 / 01期
关键词：
Quantum dots; Bovine serum albumin; Quenching; Fluorescence; Biosensing; GOLD NANOPARTICLES; TEMPERATURE; PHOTOLUMINESCENCE; STOICHIOMETRY; BINDING; CELLS;
D O I：
10.1016/j.jphotochem.2010.08.008
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：
In this work we studied the interaction between CdSe/ZnS core-shell quantum dots (QDs) and bovine serum albumin (BSA) protein, and the temperature effects on the structural and spectroscopic properties of both, individual QDs and protein and their bioconjugates (QDs@BSA), by fluorescence and UV-vis spectroscopy. The recorded UV-vis data and the calculated rate of BSA fluorescence quenching by the QDs demonstrated that the interaction between them leads to the formation of QDs@BSA complex. Moreover we show that, compared to the monotonically decrease of the non-conjugated QDs fluorescence intensity, the temperature dependence of the QDs@BSA emission has a much more complex behavior, highly sensitive to the conformational changes of the protein. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：118 / 122
页数：5
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