期刊
JOURNAL OF LUMINESCENCE
卷 142, 期 -, 页码 167-172出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2013.04.008
关键词
ZnSe/GSH Quantum dots; Microwave-assisted synthesis; Bovine serum albumin; Spectroscopic methods
类别
资金
- National High-Tech Research and Development Program of China (863 Program) [2007AA06Z418]
- National Natural Science Foundation of China [20777058, 20977070, 51001068]
- Youth Talent project of Science and Technology Research Program of Hubei Provincial Department of Education of China [Q20131105]
- Wuhan University of Science and Technology Foundation of China [z00980]
Stable, water-soluble and biologically compatible ZnSe quantum dots (QDs) with L-glutathione (GSH) as a capping agent were synthesized in aqueous medium by microwave irradiation. The GSH/Zn/Se molar ratios, reaction temperature, time and pH are the crucial factors for properties of QDs. Fluorescence (FL) spectra, absorption spectra, transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and Fourier transform infrared (FTIR) spectra studies showed that the optical properties of QDs were strong, shape of QDs was similar to spherical and the particle size was about 2-3 nm. The 42% quantum yield (QY) of QDs can be achieved without any post-preparative treatment. The interaction of QDs bioconjugated to bovine serum albumin (BSA) was also studied by absorption and FL spectra experiments. With addition of QDs, the FL intensity of BSA was largely quenched, which can be explained by static mechanism. The results suggested the QDs-BSA binding reaction was a static quenching. (C) 2013 Elsevier B.V. All rights reserved.
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