Stable, small, and water-soluble Cu-doped ZnS quantum dots prepared via femtosecond laser ablation

被引：28

作者：

Zheng, Jinju ^{[1
,2
]}

Zheng, Zhuhong ^{[1
]}

Gong, Weiwei ^{[1
,2
]}

Hu, Xuebing ^{[1
,2
]}

Gao, Wei ^{[1
,2
]}

Ren, Xinguang ^{[1
]}

Zhao, Haifeng ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 10004, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 465卷 / 4-6期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.cplett.2008.10.014

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：

Cu-doped ZnS (ZnS:Cu) quantum dots were prepared in de-ionized water by femtosecond laser ablation of a bulk ZnS: Cu target. The obtained quantum dots exhibit good colloidal stability and water solubility, showing narrow and symmetric Cu-related emission, which is analogous to the well-known blue emission from bulk ZnS: Cu. The mean size of the quantum dots varies from 2.1 to 4.0 nm by changing the laser fluence, resulting in a redshift of the emission peak from 375 to 400 nm. The experimental results demonstrate that femtosecond laser ablation is an effective method for preparing doped quantum dots. (C) 2008 Published by Elsevier B.V.

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收藏

页码：275 / 278

页数：4

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