Aqueous synthesis of Cu-doped ZnSe quantum dots

作者：Xue Gao; Chao Wang; Lu Niu; Su Xingguang^*

来源：Journal of Luminescence, 2011, 131(7): 1300-1304.

DOI：10.1016/j.jlumin.2011.03.012

• Cu:ZnSe d-dots
• Growth-doping
• Aqueous synthesis

In this paper, we described a simple growth-doping approach for aqueous synthesis of Cu-doped ZnSe quantum dots (Cu:ZnSe d-dots) with mercaptopropionic acid as stabilizer. The influences of the ratios of precursors and the concentration of Cu dopant ions on Cu:ZnSe d-dots synthesis were studied in detail in this study. The Cu dopant ions had significant influence on the optical properties of ZnSe d-dots. The bandgap emission of ZnSe was effectively restrained through Cu doping. The prolonged reflux facilitates the doping of Cu, which led to the red-shift of the emission of Cu:ZnSe d-dots from 465 to 495 nm. The stable Cu:ZnSe d-dots with high quality can be obtained under optimal conditions. As compared with cadmium-based nanocrystals synthesized in aqueous solution, Cu:ZnSe d-dots have much lower toxicity, indicating that they can be applied as outstanding fluorescent labels for biological assays, imaging of cells and tissues, even in vivo investigations.

• 出版日期2011-7
• 单位吉林大学