Synthesis and optical properties of water soluble CdSe/CdS quantum dots for biological applications

被引：31

作者：

Chu, Viet Ha ^{[1
]}

Lien Nghiem, Thi Ha ^{[2
]}

Le, Tien Ha ^{[3
]}

Vu, Dinh Lam ^{[4
]}

Tran, Hong Nhung ^{[2
]}

Lien Vu, Thi Kim ^{[1
]}

机构：

[1] Thai Nguyen University of Education, 20 Luong Ngoc Quyen, Thai Nguyen

[2] Institute of Physics, Vietnam Academic of Science and Technology, 10 Dao Tan, Hanoi

[3] Thai Nguyen University of Science, Quyet Thang, Thai Nguyen

[4] Institute of Material Science, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi

来源：

Advances in Natural Sciences: Nanoscience and Nanotechnology | 2012年 / 3卷 / 02期

关键词：

Aqueous solution; Bioapplication; CdSe/CdS quantum dots; PH values; Photoluminescence; Water soluble;

D O I：

10.1088/2043-6262/3/2/025017

中图分类号：

学科分类号：

摘要：

Water soluble CdSe/CdS quantum dots (QDs) have been synthesized directly in aqueous solution with sodium citrate as surfactant agent. The QDs are mono-dispersed in water and have strong luminescent emission intensity under excitation of ultraviolet light. The emission maxima of the QDs can be tuned in a wider range from 555 to 615 nm in water by changing synthesis conditions. The result of the synthesis of water-soluble CdSe and CdSe/CdS QDs shows the high quality of the QDs with the quite narrow luminescence emission band and photostability. The results show the strongest intensity of photoluminescence emission in media with pH value at about from 8-8.5, which are pH physiological environments. The luminescence intensity increases when the QDs are coated with a polyethylene glycol (PEG) or bovine serum albumin (BSA) protein layer, the lifetime also increases. © 2012 Vietnam Academy of Science & Technology.

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